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.github/workflows/cabal.ymldeleted−64
since splitsnapshots
unifiedsplit
@@ -1,64 +0,0 @@
1−# modified from https://github.com/jgm/pandoc/blob/master/.github/workflows/ci.yml
2−name: Cabal CI
3−
4−on:
5− push:
6− branches:
7− - '**'
8− paths-ignore: []
9− pull_request:
10− paths-ignore: []
11−
12−jobs:
13− linux:
14−
15− runs-on: ubuntu-20.04
16− strategy:
17− fail-fast: false
18− matrix:
19− versions:
20− - ghc: '8.8.4'
21− cabal: '3.4'
22− - ghc: '8.10.4'
23− cabal: '3.4'
24− steps:
25− - uses: actions/checkout@v2
26−
27− # need to install older cabal/ghc versions from ppa repository
28−
29− - name: Install recent cabal/ghc
30− uses: actions/setup-haskell@v1.1.3
31− with:
32− ghc-version: ${{ matrix.versions.ghc }}
33− cabal-version: ${{ matrix.versions.cabal }}
34−
35− # declare/restore cached things
36− # caching doesn't work for scheduled runs yet
37− # https://github.com/actions/cache/issues/63
38−
39− - name: Cache cabal global package db
40− id: cabal-global
41− uses: actions/cache@v2
42− with:
43− path: |
44− ~/.cabal
45− key: ${{ runner.os }}-${{ matrix.versions.ghc }}-${{ matrix.versions.cabal }}-cabal-global-${{ hashFiles('cabal.project') }}
46−
47− - name: Cache cabal work
48− id: cabal-local
49− uses: actions/cache@v2
50− with:
51− path: |
52− dist-newstyle
53− key: ${{ runner.os }}-${{ matrix.versions.ghc }}-${{ matrix.versions.cabal }}-cabal-local
54−
55− - name: Install dependencies
56− run: |
57− cabal update
58− cabal build all --dependencies-only --enable-tests --disable-optimization
59− - name: Build
60− run: |
61− cabal build all --enable-tests --disable-optimization 2>&1 | tee build.log
62− - name: Test
63− run: |
64− cabal test all --disable-optimization
.github/workflows/ci.yml+3−6
@@ -1,4 +1,4 @@
1−name: Stack CI
1+name: CI
2
2
3# Trigger the workflow on push or pull request, but only for the master branch
3# Trigger the workflow on push or pull request, but only for the master branch
4on:
4on:
@@ -12,14 +12,13 @@ jobs:
12 strategy:
12 strategy:
13 matrix:
13 matrix:
14 stack: ["2.3.3"]
14 stack: ["2.3.3"]
15− ghc: ["8.10.4"]
15+ ghc: ["8.8.3"]
16 os: [ubuntu-latest]
16 os: [ubuntu-latest]
17 steps:
17 steps:
18 - uses: actions/checkout@v2
18 - uses: actions/checkout@v2
19 if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
19 if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
20
20
21− - uses: actions/setup-haskell@v1.1.4
21+ - uses: actions/setup-haskell@v1.1
22− if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
23 name: Setup Haskell Stack
22 name: Setup Haskell Stack
24 with:
23 with:
25 ghc-version: ${{ matrix.ghc }}
24 ghc-version: ${{ matrix.ghc }}
@@ -27,13 +26,11 @@ jobs:
27 enable-stack: true
26 enable-stack: true
28
27
29 - uses: actions/cache@v1
28 - uses: actions/cache@v1
30− if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
31 name: Cache ~/.stack
29 name: Cache ~/.stack
32 with:
30 with:
33 path: ~/.stack
31 path: ~/.stack
34 key: ${{ runner.os }}-${{ matrix.ghc }}-stack
32 key: ${{ runner.os }}-${{ matrix.ghc }}-stack
35
33
36 - name: Test
34 - name: Test
37− if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
38 run: |
35 run: |
39 stack test
36 stack test
EXAMPLE.mddeleted−143
@@ -1,143 +0,0 @@
1−# Example
2−
3−Our api under test:
4−
5−``` haskell
6−-- Obligatory fancy-types pragma tax
7−{-# LANGUAGE DataKinds #-}
8−{-# LANGUAGE TypeOperators #-}
9−{-# LANGUAGE DerivingStrategies #-}
10−{-# LANGUAGE StandaloneDeriving #-}
11−{-# LANGUAGE DerivingVia #-}
12−{-# LANGUAGE TypeApplications #-}
13−{-# LANGUAGE DeriveGeneric #-}
14−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
15−{-# LANGUAGE RecordWildCards #-}
16−{-# LANGUAGE ScopedTypeVariables #-}
17−{-# LANGUAGE TypeApplications #-}
18−
19−import qualified Roboservant.Server as RS
20−import qualified Roboservant.Client as RC
21−import Servant.Client(ClientEnv, baseUrlPort, parseBaseUrl, mkClientEnv)
22−import Network.HTTP.Client (newManager, defaultManagerSettings)
23−import Roboservant.Types
24−import Test.Hspec
25−import Servant
26−import GHC.Generics
27−import Data.Typeable
28−import Data.Hashable
29−import Data.Maybe(isNothing, isJust)
30−import qualified Network.Wai.Handler.Warp as Warp
31−import Data.Aeson(FromJSON,ToJSON)
32−
33−newtype A = A Int
34− deriving (Generic, Eq, Show, Typeable)
35− deriving newtype (Hashable, FromHttpApiData, ToHttpApiData)
36−
37−instance FromJSON A
38−instance ToJSON A
39−
40−newtype B = B Int
41− deriving (Generic, Eq, Show, Typeable)
42− deriving newtype (Hashable, FromHttpApiData, ToHttpApiData)
43−
44−instance FromJSON B
45−instance ToJSON B
46−
47−type Api =
48− "item" :> Get '[JSON] A
49− :<|> "itemAdd" :> Capture "one" B :> Capture "two" B :> Get '[JSON] B
50− :<|> "item" :> Capture "itemId" B :> Get '[JSON] ()
51−
52−server :: Handler A -> Server Api
53−server introduce = introduce :<|> combine :<|> eliminate
54− where
55− combine (B i) (B j) = pure $ B (i + j)
56− eliminate (B i)
57− | i > 10 = error "give up, eleven is way too big and probably not even real"
58− | otherwise = pure ()
59−```
60−
61−We have a "good" server, that never generates anything other than a 0. This means repeated application of
62−the combination/addition rule can never bring us to the dangerous state of numbers larger than 10.
63−
64−``` haskell
65−goodServer, badServer :: Server Api
66−goodServer = server (pure $ A 0)
67−badServer = server (pure $ A 1)
68−```
69−
70−In the test file, we first define the tests: the faulty server should fail and the good server should pass.
71−
72−```haskell
73−main :: IO ()
74−main = hspec spec
75−
76−spec :: Spec
77−spec = describe "example" $ do
78− it "good server should not fail" $ do
79− RS.fuzz @Api goodServer config
80− >>= (`shouldSatisfy` isNothing)
81− it "bad server should fail" $ do
82− RS.fuzz @Api badServer config
83− >>= (`shouldSatisfy` isJust)
84−```
85−
86−The previous test just picked apart the server and ran functions manually: sometimes, we want to test via
87−an honest-to-goodness network port, like so:
88−
89−```haskell
90− around (withServer (serve (Proxy :: Proxy Api) badServer)) $ do
91− it "we should also be able to run the _client_ to an independent server (ignore server error messages)" $ \(clientEnv::ClientEnv) -> do
92− RC.fuzz @Api clientEnv config >>= (`shouldSatisfy` isJust)
93−```
94−
95−(we use withApplication rather than testWithApplication because we don't primarily care what the server does here:
96−we want to check what a client does when presented with a faulty server.)
97−
98−We expect to be able to cover the whole api from our starting point, so let's set the coverage to 0.99.
99−There are other tweakable things in the config, like maximum runtime, reps,
100−per-request healthchecks, seeds, and verbose logging. Have a look at
101−Roboservant.Types.Config for details.
102−
103−``` haskell
104−config :: Config
105−config = defaultConfig
106− { coverageThreshold = 0.99
107− }
108−```
109−
110−Unless we want to ship roboservant and all its dependencies to production, we also need
111−some orphan instances: because As are the only value we can get without
112−an input, we need to be able to break them down.
113−
114−``` haskell
115−deriving via (Compound A) instance Breakdown A
116−```
117−
118−if we wanted to assemble As from parts as well, we'd derive using Compound, but in this case we don't care.
119−
120−``` haskell
121−deriving via (Atom A) instance BuildFrom A
122−
123−```
124−
125−Similarly, to generate the first B from the Ints we got from inside the A, we need to be able to
126−build it up from components.
127−
128−```haskell
129−deriving via (Compound B) instance BuildFrom B
130−deriving via (Atom B) instance Breakdown B
131−```
132−
133−
134−test utilities:
135−
136−``` haskell
137−withServer :: Application -> ActionWith ClientEnv -> IO ()
138−withServer app action = Warp.withApplication (pure app) (\p -> genClientEnv p >>= action)
139− where genClientEnv port = do
140− baseUrl <- parseBaseUrl "http://localhost"
141− manager <- newManager defaultManagerSettings
142− pure $ mkClientEnv manager (baseUrl { baseUrlPort = port })
143−```
Example.lhsdeleted−1
@@ -1 +0,0 @@
1−EXAMPLE.md
Makefile+1−3
@@ -1,4 +1,2 @@
1testwatch:
1testwatch:
2− ghcid -T main -c 'stack repl roboservant:lib roboservant:test:roboservant-test --test --ghc-options=-fobject-code' --allow-eval --restart="stack.yaml" --restart="package.yaml" -W
3−pedanticwatch:
4− ghcid -c 'stack repl --test --ghc-options=-fobject-code' --allow-eval --restart="stack.yaml" --restart="package.yaml" -W
2+ ghcid -T main -c 'stack repl --test --ghc-options=-fobject-code roboservant --ghc-options="+RTS -N4"' --allow-eval --restart="stack.yaml" --restart="package.yaml" -W
README.md+23−87
@@ -2,86 +2,45 @@
2
2
3Automatically fuzz your servant apis in a contextually-aware way.
3Automatically fuzz your servant apis in a contextually-aware way.
4
4
5−[![Stack CI](https://github.com/mwotton/roboservant/actions/workflows/ci.yml/badge.svg)](https://github.com/mwotton/roboservant/actions/workflows/ci.yml)
5+![CI](https://github.com/mwotton/roboservant/workflows/CI/badge.svg)
6−[![Cabal CI](https://github.com/mwotton/roboservant/actions/workflows/cabal.yml/badge.svg)](https://github.com/mwotton/roboservant/actions/workflows/cabal.yml)
7
6
8−## example
9
7
10−see full example [here](EXAMPLE.md)
11−
12−## why?
8+# why?
13
9
14Servant gives us a lot of information about what a server can do. We
10Servant gives us a lot of information about what a server can do. We
15use this information to generate arbitrarily long request/response
11use this information to generate arbitrarily long request/response
16sessions and verify properties that should hold over them.
12sessions and verify properties that should hold over them.
17
13
18−## how?
14+# example
19−
20−In essence, ```fuzz @Api yourServer config``` will make a bunch of
21−calls to your API, and record the results in a type-indexed
22−dictionary. This means that they are now available for the
23−prerequisites of other calls, so as you proceed, more and more api
24−calls become possible.
25−
26−We explicitly do not try to come up with plausible values that haven't
27−somehow come back from the API. That's straying into QC/Hedgehog
28−territory: if you want that, come up with the values on that side, and
29−set them as seeds in the configuration.
30−
31−### what does it mean to be "available"?
32−
33−In a simple API, you may make a call and get back a `Foo`, which will
34−allow you to make another call that requires a `Foo`. In a more
35−complicated app, it's likely that you'll send a request body that
36−includes many subcomponents, and it's likely you'll get a response
37−that needs to be broken down into pieces before it's useful.
38
15
39−To cope with this, we have the typeclasses `BuildFrom` and
16+Our api under test:
40−`Breakdown`. You can write instances for them if you feel like it, and
41−indeed it's currently required for recursive datatypes if you don't
42−want the fuzzer to hang, but for the majority of your types it should
43−be sufficient to derive them generically. (Sensible instances are
44−provided for lists.)
45
17
46−There are two basic strategies here. In some cases, you want to regard
47−a type as indivisible: that's why we like newtypes, right? In this
48−case, we can derive using the `Atom` strategy.
49−
50−``` haskell
51−deriving via (Atom NewtypedKey) instance Breakdown NewtypedKey
52−deriving via (Atom NewtypedKey) instance BuildFrom NewtypedKey
53```
18```
54−
19+newtype Foo = Foo Int
55−This is saying "A can neither be built from components or broken down
20+ deriving (Generic, Eq, Show, Typeable)
56−for spare parts. Hands off!". This is a good strategy for key types,
21+ deriving newtype (FromHttpApiData, ToHttpApiData)
57−for instance.
22+
58−
23+type FooApi =
59−If instead it's a big complicated thing with lots of juicy
24+ "item" :> Get '[JSON] Foo
60−subcomponents, we want to rip it apart using Generics and feast on
25+ :<|> "itemAdd" :> Capture "one" Foo :> Capture "two" Foo :> Get '[JSON] Foo
61−its succulent headmeats:
26+ :<|> "item" :> Capture "itemId" Foo :> Get '[JSON] ()
62−
63−``` haskell
64−deriving via (Compound Payload) instance Breakdown Payload
65−deriving via (Compound Payload) instance BuildFrom Payload
66```
27```
67
28
68−### priming the pump
29+From the tests:
69
30
70−Sometimes there are values we'd like to smuggle into the API that are
31+```
71−not derivable from within the API itself: sometimes this is a warning
32+ assert "should find an error in Foo" . not
72−sign that your API is incomplete, but it can be quite reasonable to
33+ =<< checkSequential (Group "Foo" [("Foo", RS.prop_sequential @Foo.FooApi Foo.fooServer)])
73−require identifying credentials within an API and not provide a way to
34+```
74−get them. It might also be reasonable to have some sample values that
75−the user is expected to come up with.
76
35
77−For those cases, override the `seed` in the `Config` with a
36+We have a server that blows up if the value of the int in a `Foo` ever gets above 10. Note:
78−list of seed values, suitably hashed:
37+there is no generator for `Foo` types: larger `Foo`s can only be made only by combining existing
38+`Foo`s with `itemAdd`. This is an important distinction, because many APIs will return UUIDs or
39+similar as keys, which make it impossible to cover a useful section of the state space without
40+using the values returned by the API
79
41
80−``` haskell
81−defaultConfig { seed = [hashedDyn creds, hashedDyn userJwt]}
82−```
83
42
84−## why not servant-quickcheck?
43+# why not servant-quickcheck?
85
44
86[servant-quickcheck](https://hackage.haskell.org/package/servant-quickcheck)
45[servant-quickcheck](https://hackage.haskell.org/package/servant-quickcheck)
87is a great package and I've learned a lot from it. Unfortunately, as mentioned previously,
46is a great package and I've learned a lot from it. Unfortunately, as mentioned previously,
@@ -89,26 +48,3 @@ there's a lot of the state space you just can't explore without context: modern
89full of pointer-like structures, whether they're URLs or database
48full of pointer-like structures, whether they're URLs or database
90keys/uuids, and servant-quickcheck requires that you be able to generate
49keys/uuids, and servant-quickcheck requires that you be able to generate
91these without context via Arbitrary.
50these without context via Arbitrary.
92−
93−## limitations and future work
94−
95−Currently, the display of failing traces is pretty tragic, both in the
96−formatting and in its non-minimality. This is pretty ticklish:
97−arguably the right way to do this is to return a trace that we can
98−also rerun, and let quickcheck or hedgehog a level up shrink it until
99−it's satisfactorily short. In the interest of being useful earlier
100−rather than later, I'm releasing v1.0 before I crack this particular
101−nut. We do know which calls we made that led to the failing case, so
102−we would want to show that distinction in a visible way: it's possible
103−that other calls that don't have direct data dependencies were
104−important, but we definitely know we need the direct data dependencies.
105−
106−The provenance stuff is a bit underbaked. It should at least pull a
107−representation of the route chosen rather than just an integer index.
108−
109−It would also be nice to have a robust strategy for deriving recursive
110−datatypes, or at least rejecting attempts to generate them that don't
111−end in an infinite loop.
112−
113−Currently the `FlattenServer` instance for `:>` is quadratic. It would
114−be nice to fix this but I lack the art.
benchmarks/README.mddeleted−30
@@ -1,30 +0,0 @@
1−# Benchmarks
2−
3−I've noticed compilation can be a little slow on realistic apps so I set up a test.
4−
5−## components
6−
7−1. codegen
8−
9− given an integer input n, create an api with n endpoints. they should take a reasonably
10− complicated input and return a reasonably complicated output
11−
12−2. runner
13−
14− build dependencies
15− for i from 1 to 100
16− generate api with i endpoints
17− compile it, but timed
18− print (i,time)
19−
20−3. plot to see linearity/quadraticity?
21−
22−## possible gotchas
23−
24−- we usually compile these in different modules rather than together: if we don't get slow
25− compilation in one file, try out multiple files.
26−
27−## notes
28−
29−- flat profile if you don't have the call to `fuzz`
30−- no difference between deriving via Atom vs Compound, so not a Generics thing.
benchmarks/genFile.shdeleted−26
@@ -1,26 +0,0 @@
1−n=$1
2−k=$2
3−
4−cat prelude
5−echo -n "type SubApi = \"route1\" :> ReqBody '[JSON] Input :> Post '[JSON] Output"
6−for i in $(seq 2 $n); do
7− echo -n " :<|> \"route${i}\" :> "
8− echo "ReqBody '[JSON] Input :> Post '[JSON] Output"
9−done
10−
11−echo -n "server = handler "
12−
13−for i in $(seq 2 $n); do
14− echo -n ":<|> handler "
15−done
16−echo
17−echo
18−
19−echo -n "type Api = Flatten ("
20−for i in $(seq 1 $k); do
21− echo -n '"foo" :> '
22−done;
23−
24−echo "SubApi )"
25−
26−
benchmarks/preludedeleted−61
@@ -1,61 +0,0 @@
1−{-# LANGUAGE LambdaCase #-}
2−{-# LANGUAGE TypeOperators #-}
3−{-# LANGUAGE DataKinds #-}
4−{-# LANGUAGE TypeApplications #-}
5−{-# LANGUAGE DerivingVia #-}
6−{-# LANGUAGE StandaloneDeriving #-}
7−{-# LANGUAGE DeriveGeneric #-}
8−
9−
10−import Roboservant
11−import Servant
12−import Data.Hashable
13−import GHC.Generics
14−import Data.Aeson
15−import Servant.API.Flatten
16−
17−data Input = Input1 { foo :: String }
18− | Input2 { bar :: Int }
19− deriving (Generic, Eq)
20−
21−instance FromJSON Input
22−instance ToJSON Input
23−
24−
25−deriving via (Compound Input) instance Breakdown Input
26−deriving via (Compound Input) instance BuildFrom Input
27−
28−
29−-- deriving via (Atom Input) instance Breakdown Input
30−-- deriving via (Atom Input) instance BuildFrom Input
31−
32−instance Hashable Input
33−
34−
35−data Output = Output1 { ofoo :: String }
36− | Output2 { obar :: Int }
37− deriving (Generic, Eq)
38−
39−instance FromJSON Output
40−instance ToJSON Output
41−
42−instance Hashable Output
43−
44−deriving via (Compound Output) instance Breakdown Output
45−deriving via (Compound Output) instance BuildFrom Output
46−
47−-- deriving via (Atom Output) instance Breakdown Output
48−-- deriving via (Atom Output) instance BuildFrom Output
49−
50−
51−handler :: Input -> Handler Output
52−handler = pure . \case
53− Input1 foo -> Output1 foo
54− Input2 bar -> Output2 bar
55−
56−main =
57− -- fuzz @Api server defaultConfig
58− pure ()
59−
60−f = flatten (Proxy @Api)
61−
benchmarks/runTiming.shdeleted−10
@@ -1,10 +0,0 @@
1−lo=$1
2−hi=$2
3−k=$3
4−for i in $(seq $lo 5 $hi); do
5− ./genFile.sh $i $k > main.hs;
6− echo "sievedn: $i,";
7− /usr/bin/time -f "%e" stack ghc main.hs 2>&1;
8−# /usr/bin/time -f "%e" stack ghc -- -fomit-interface-pragmas main.hs 2>&1;
9−
10−done | grep -v Compiling | grep -v Linking | awk '/,$/ { printf("%s", $0); next } 1' | sed 's/sievedn: //'
benchmarks/runTimingNoisy.shdeleted−10
@@ -1,10 +0,0 @@
1−lo=$1
2−hi=$2
3−
4−for i in $(seq $lo 5 $hi); do
5− ./genFile.sh $i > main.hs;
6− echo "sievedn: $i,";
7− /usr/bin/time -f "%e" stack ghc main.hs 2>&1;
8−# /usr/bin/time -f "%e" stack ghc -- -fomit-interface-pragmas main.hs 2>&1;
9−
10−done
package.yaml+7−36
@@ -1,8 +1,9 @@
1−
2name: roboservant
1name: roboservant
3−version: 0.1.0.3
2+version: 0.1.0.2
4github: "mwotton/roboservant"
3github: "mwotton/roboservant"
5license: BSD3
4license: BSD3
5+author: "Mark Wotton, Samuel Schlesinger"
6+maintainer: "mwotton@gmail.com"
6copyright: "2020 Mark Wotton, Samuel Schlesinger"
7copyright: "2020 Mark Wotton, Samuel Schlesinger"
7synopsis: Automatic session-aware servant testing
8synopsis: Automatic session-aware servant testing
8category: Web
9category: Web
@@ -17,28 +18,16 @@ dependencies:
17
18
18- bytestring
19- bytestring
19- containers
20- containers
20−- random
21+- hedgehog
21−- hashable
22−- http-types
23−- lifted-base
24−- monad-control
25- mtl
22- mtl
26- servant # >= 0.17
23- servant # >= 0.17
27- servant-client # >= 0.17
24- servant-client # >= 0.17
28- servant-flatten
25- servant-flatten
29- servant-server # >= 0.17
26- servant-server # >= 0.17
30- string-conversions
27- string-conversions
31−- vinyl
32−- dependent-sum
33−- dependent-map
34−- unordered-containers
35−- text
36−- time
37
28
38−ghc-options:
29+ghc-options: -Wall
39−- -Wall
30+
40−- -fwrite-ide-info
41−- -hiedir=.hie
42library:
31library:
43 source-dirs: src
32 source-dirs: src
44
33
@@ -55,22 +44,4 @@ tests:
55 - aeson
44 - aeson
56 - hspec
45 - hspec
57 - hspec-core
46 - hspec-core
58− - http-api-data
59− - http-client
60− - hspec-wai
47+ - hspec-hedgehog
61− - wai
62− - warp
63− example:
64− main: Example.lhs
65− source-dirs: .
66−
67− dependencies:
68− - roboservant
69− - hspec
70− - warp
71− - http-client
72− - aeson
73− - hspec-core
74− ghc-options: -pgmL markdown-unlit
75−
76− build-tools: markdown-unlit
roboservant.cabal+11−89
@@ -1,18 +1,20 @@
1cabal-version: 1.12
1cabal-version: 1.12
2
2
3−-- This file has been generated from package.yaml by hpack version 0.35.0.
3+-- This file has been generated from package.yaml by hpack version 0.33.0.
4--
4--
5-- see: https://github.com/sol/hpack
5-- see: https://github.com/sol/hpack
6--
6--
7−-- hash: 0c0c35e1dca1d6c52e5bc61591cbd8c0da9d811b83341bbc676c5f8b93b0b20d
7+-- hash: c6f561e011d580d9e17888decc01e0d8d54c8508b04d3dfff3cfcb7f37e5f2e1
8
8
9name: roboservant
9name: roboservant
10−version: 0.1.0.3
10+version: 0.1.0.2
11synopsis: Automatic session-aware servant testing
11synopsis: Automatic session-aware servant testing
12description: Please see the README on GitHub at <https://github.com/mwotton/roboservant#readme>
12description: Please see the README on GitHub at <https://github.com/mwotton/roboservant#readme>
13category: Web
13category: Web
14homepage: https://github.com/mwotton/roboservant#readme
14homepage: https://github.com/mwotton/roboservant#readme
15bug-reports: https://github.com/mwotton/roboservant/issues
15bug-reports: https://github.com/mwotton/roboservant/issues
16+author: Mark Wotton, Samuel Schlesinger
17+maintainer: mwotton@gmail.com
16copyright: 2020 Mark Wotton, Samuel Schlesinger
18copyright: 2020 Mark Wotton, Samuel Schlesinger
17license: BSD3
19license: BSD3
18license-file: LICENSE
20license-file: LICENSE
@@ -28,131 +30,51 @@ source-repository head
28library
30library
29 exposed-modules:
31 exposed-modules:
30 Roboservant
32 Roboservant
31− Roboservant.Client
33+ Roboservant.StateMachine
32− Roboservant.Direct
33− Roboservant.Server
34 Roboservant.Types
34 Roboservant.Types
35− Roboservant.Types.Breakdown
36− Roboservant.Types.BuildFrom
37− Roboservant.Types.Config
38− Roboservant.Types.Internal
39− Roboservant.Types.Orphans
40− Roboservant.Types.ReifiedApi
41− Roboservant.Types.ReifiedApi.Server
42 other-modules:
35 other-modules:
43 Paths_roboservant
36 Paths_roboservant
44 hs-source-dirs:
37 hs-source-dirs:
45 src
38 src
46− ghc-options: -Wall -fwrite-ide-info -hiedir=.hie
39+ ghc-options: -Wall
47 build-depends:
40 build-depends:
48 base >=4.7 && <5
41 base >=4.7 && <5
49 , bytestring
42 , bytestring
50 , containers
43 , containers
51− , dependent-map
44+ , hedgehog
52− , dependent-sum
53− , hashable
54− , http-types
55− , lifted-base
56− , monad-control
57 , mtl
45 , mtl
58− , random
59 , servant
46 , servant
60 , servant-client
47 , servant-client
61 , servant-flatten
48 , servant-flatten
62 , servant-server
49 , servant-server
63 , string-conversions
50 , string-conversions
64− , text
65− , time
66− , unordered-containers
67− , vinyl
68− default-language: Haskell2010
69−
70−test-suite example
71− type: exitcode-stdio-1.0
72− main-is: Example.lhs
73− other-modules:
74− Paths_roboservant
75− hs-source-dirs:
76− ./
77− ghc-options: -Wall -fwrite-ide-info -hiedir=.hie -pgmL markdown-unlit
78− build-tool-depends:
79− markdown-unlit:markdown-unlit
80− build-depends:
81− aeson
82− , base >=4.7 && <5
83− , bytestring
84− , containers
85− , dependent-map
86− , dependent-sum
87− , hashable
88− , hspec
89− , hspec-core
90− , http-client
91− , http-types
92− , lifted-base
93− , monad-control
94− , mtl
95− , random
96− , roboservant
97− , servant
98− , servant-client
99− , servant-flatten
100− , servant-server
101− , string-conversions
102− , text
103− , time
104− , unordered-containers
105− , vinyl
106− , warp
107 default-language: Haskell2010
51 default-language: Haskell2010
108
52
109test-suite roboservant-test
53test-suite roboservant-test
110 type: exitcode-stdio-1.0
54 type: exitcode-stdio-1.0
111 main-is: Spec.hs
55 main-is: Spec.hs
112 other-modules:
56 other-modules:
113− Breakdown
114 Foo
57 Foo
115 Headers
58 Headers
116− Nested
117− Post
118− Product
119− Put
120− QueryParams
121− Seeded
122 UnsafeIO
59 UnsafeIO
123− Valid
124 Paths_roboservant
60 Paths_roboservant
125 hs-source-dirs:
61 hs-source-dirs:
126 test
62 test
127− ghc-options: -Wall -fwrite-ide-info -hiedir=.hie -threaded -rtsopts -with-rtsopts=-N
63+ ghc-options: -Wall -threaded -rtsopts -with-rtsopts=-N
128 build-depends:
64 build-depends:
129 aeson
65 aeson
130 , base >=4.7 && <5
66 , base >=4.7 && <5
131 , bytestring
67 , bytestring
132 , containers
68 , containers
133− , dependent-map
69+ , hedgehog
134− , dependent-sum
135− , hashable
136 , hspec
70 , hspec
137 , hspec-core
71 , hspec-core
138− , hspec-wai
72+ , hspec-hedgehog
139− , http-api-data
140− , http-client
141− , http-types
142− , lifted-base
143− , monad-control
144 , mtl
73 , mtl
145− , random
146 , roboservant
74 , roboservant
147 , servant
75 , servant
148 , servant-client
76 , servant-client
149 , servant-flatten
77 , servant-flatten
150 , servant-server
78 , servant-server
151 , string-conversions
79 , string-conversions
152− , text
153− , time
154− , unordered-containers
155− , vinyl
156− , wai
157− , warp
158 default-language: Haskell2010
80 default-language: Haskell2010
src/Roboservant.hs+2−7
@@ -1,8 +1,3 @@
1−module Roboservant
1+module Roboservant (module Roboservant.StateMachine) where
2− ( module Roboservant.Direct,
3− module Roboservant.Types,
4− )
5−where
6
2
7−import Roboservant.Direct
3+import Roboservant.StateMachine
8−import Roboservant.Types
src/Roboservant/Client.hsdeleted−127
@@ -1,127 +0,0 @@
1−{-# LANGUAGE RankNTypes #-}
2−{-# LANGUAGE TypeOperators #-}
3−{-# LANGUAGE NamedFieldPuns #-}
4−{-# LANGUAGE DataKinds #-}
5−{-# LANGUAGE AllowAmbiguousTypes #-}
6−{-# LANGUAGE DataKinds #-}
7−{-# LANGUAGE GADTs #-}
8−{-# LANGUAGE PolyKinds #-}
9−{-# LANGUAGE ScopedTypeVariables #-}
10−{-# LANGUAGE TypeApplications #-}
11−
12−{-# LANGUAGE UndecidableInstances #-}
13−{-# LANGUAGE TypeFamilies #-}
14−{-# LANGUAGE FlexibleContexts #-}
15−-- should all the NormalizeFunction instances be in one place?
16−{-# OPTIONS_GHC -fno-warn-orphans #-}
17−module Roboservant.Client where
18−
19−import Data.Proxy
20−import Servant.Client
21−import Roboservant.Types
22−import Roboservant(Report, fuzz')
23−import Servant
24−import Data.Bifunctor
25−import Data.List.NonEmpty (NonEmpty)
26−import Data.Dynamic (Dynamic,Typeable)
27−import qualified Data.Vinyl.Curry as V
28−import qualified Data.Text as T
29−import Control.Monad.Reader
30−import Data.Hashable
31−import Network.HTTP.Types.Status
32−
33−-- fuzz :: forall api.
34−-- (FlattenServer api, ToReifiedApi (Endpoints api)) =>
35−-- Server api ->
36−-- Config ->
37−-- IO (Maybe Report)
38−-- fuzz s = fuzz' (reifyServer s)
39−-- -- todo: how do we pull reifyServer out?
40−-- where reifyServer :: (FlattenServer api, ToReifiedApi (Endpoints api))
41−-- => Server api -> ReifiedApi
42−-- reifyServer server = toReifiedApi (flattenServer @api server) (Proxy @(Endpoints api))
43−
44−fuzz :: forall api . (ToReifiedClientApi (Endpoints api), FlattenClient api, HasClient ClientM api)
45− => ClientEnv -> Config -> IO (Maybe Report)
46−fuzz clientEnv
47− = fuzz'
48− (toReifiedClientApi
49− (flattenClient @api apiClient) (Proxy @(Endpoints api)) clientEnv)
50− where apiClient = client (Proxy @api)
51−
52−
53−
54−class ToReifiedClientApi api where
55− toReifiedClientApi :: ClientBundled api -> Proxy api -> ClientEnv -> ReifiedApi
56−
57−data ClientBundled endpoints where
58− AClientEndpoint :: Client ClientM endpoint -> ClientBundled endpoints -> ClientBundled (endpoint ': endpoints)
59− NoClientEndpoints :: ClientBundled '[]
60−
61−
62−class FlattenClient api where
63− flattenClient :: Client ClientM api -> ClientBundled (Endpoints api)
64−
65−instance
66− ( NormalizeFunction (Client ClientM endpoint)
67− , Normal (Client ClientM endpoint) ~ V.Curried (EndpointArgs endpoint) (ReaderT ClientEnv IO (Either InteractionError (NonEmpty (Dynamic,Int))))
68− , ToReifiedClientApi endpoints
69− , V.RecordCurry' (EndpointArgs endpoint)
70− , ToReifiedEndpoint endpoint) =>
71− ToReifiedClientApi (endpoint : endpoints) where
72− toReifiedClientApi (endpoint `AClientEndpoint` endpoints) _ clientEnv =
73− (0, ReifiedEndpoint
74− { reArguments = reifiedEndpointArguments @endpoint
75− , reEndpointFunc = foo (normalize endpoint)
76− }
77− )
78− : (map . first) (+1)
79− (toReifiedClientApi endpoints (Proxy @endpoints) clientEnv)
80− where
81−
82− foo :: V.Curried (EndpointArgs endpoint) (ReaderT ClientEnv IO ResultType)
83− -> V.Curried (EndpointArgs endpoint) (IO ResultType)
84− foo = mapCurried @(EndpointArgs endpoint) @(ReaderT ClientEnv IO ResultType) (`runReaderT` clientEnv)
85−
86−mapCurried :: forall ts a b. V.RecordCurry' ts => (a -> b) -> V.Curried ts a -> V.Curried ts b
87−mapCurried f g = V.rcurry' @ts $ f . V.runcurry' g
88−
89−type ResultType = Either InteractionError (NonEmpty (Dynamic,Int))
90−-- runClientM :: ClientM a -> ClientEnv -> IO (Either ServantError a)
91−
92−
93−instance (Typeable x, Hashable x, Breakdown x) => NormalizeFunction (ClientM x) where
94− type Normal (ClientM x) = ReaderT ClientEnv IO (Either InteractionError (NonEmpty (Dynamic,Int)))
95− normalize c = ReaderT $
96− fmap (bimap renderClientError breakdown) . runClientM c
97− where
98− renderClientError :: ClientError -> InteractionError
99− renderClientError err = case err of
100− FailureResponse _ Response{responseStatusCode} -> InteractionError textual (responseStatusCode == status500)
101− _ -> InteractionError textual True
102−
103− where textual = T.pack $ show err
104−instance ToReifiedClientApi '[] where
105− toReifiedClientApi NoClientEndpoints _ _ = []
106−
107−
108−instance
109− ( FlattenClient api,
110− Endpoints endpoint ~ '[endpoint]
111− ) =>
112− FlattenClient (endpoint :<|> api)
113− where
114− flattenClient (endpoint :<|> c) = endpoint `AClientEndpoint` flattenClient @api c
115−
116−instance
117− (
118− Endpoints api ~ '[api]
119− ) =>
120− FlattenClient (x :> api)
121− where
122− flattenClient c = c `AClientEndpoint` NoClientEndpoints
123−
124−
125−instance FlattenClient (Verb method statusCode contentTypes responseType)
126− where
127− flattenClient c = c `AClientEndpoint` NoClientEndpoints
src/Roboservant/Direct.hsdeleted−311
@@ -1,311 +0,0 @@
1−{-# LANGUAGE AllowAmbiguousTypes #-}
2−{-# LANGUAGE FlexibleContexts #-}
3−{-# LANGUAGE GADTs #-}
4−{-# LANGUAGE LambdaCase #-}
5−{-# LANGUAGE PolyKinds #-}
6−{-# LANGUAGE RankNTypes #-}
7−{-# LANGUAGE RecordWildCards #-}
8−{-# LANGUAGE ScopedTypeVariables #-}
9−{-# LANGUAGE TupleSections #-}
10−
11−{-# LANGUAGE TypeFamilies #-}
12−{-# LANGUAGE UndecidableInstances #-}
13−
14−module Roboservant.Direct
15− ( fuzz',
16− Config (..),
17− -- TODO come up with something smarter than exporting all this, we should
18− -- have some nice error-display functions
19− RoboservantException (..),
20− FuzzState (..),
21− FuzzOp (..),
22− FailureType (..),
23− Report (..),
24− )
25−where
26−
27−import Control.Exception.Lifted
28− ( Exception,
29− Handler (Handler),
30− SomeAsyncException,
31− SomeException,
32− catch,
33− catches,
34− handle,
35− throw,
36− )
37−import Control.Monad.State.Strict
38− ( MonadIO (..),
39− MonadState (get),
40− StateT (runStateT),
41− modify',
42− )
43−import Control.Monad.Trans.Control (MonadBaseControl)
44−import qualified Data.Dependent.Map as DM
45−import Data.Dynamic (Dynamic (..))
46−import qualified Data.IntSet as IntSet
47−import Data.List.NonEmpty (NonEmpty (..))
48−import qualified Data.List.NonEmpty as NEL
49−import Data.Maybe (mapMaybe)
50−import qualified Data.Set as Set
51−import Data.Time.Clock (UTCTime, addUTCTime, getCurrentTime)
52−import qualified Data.Vinyl as V
53−import qualified Data.Vinyl.Curry as V
54−import qualified Data.Vinyl.Functor as V
55−import GHC.Generics ((:*:) (..))
56−import Roboservant.Types
57− ( ApiOffset (..),
58− Argument (..),
59− InteractionError(..),
60− Provenance (..),
61− ReifiedApi,
62− ReifiedEndpoint (..),
63− Stash (..),
64− StashValue (..),
65− TypedF,
66− )
67−import Roboservant.Types.Config
68−
69−import System.Random (Random (randomR), StdGen, mkStdGen)
70−import qualified Type.Reflection as R
71−
72−data RoboservantException
73− = RoboservantException
74− { failureReason :: FailureType,
75− serverException :: Maybe SomeException,
76− fuzzState :: FuzzState
77− }
78− deriving (Show)
79−
80−instance Exception RoboservantException
81−
82−data FailureType
83− = ServerCrashed
84− | CheckerFailed
85− | NoPossibleMoves
86− | InsufficientCoverage Double
87− deriving (Show, Eq)
88−
89−data FuzzOp
90− = FuzzOp
91− { apiOffset :: ApiOffset,
92− provenance :: [Provenance]
93− }
94− deriving (Show, Eq)
95−
96−data FuzzState
97− = FuzzState
98− { path :: [FuzzOp],
99− stash :: Stash,
100− currentRng :: StdGen
101− }
102− deriving (Show)
103−
104−data EndpointOption
105− = forall as.
106− (V.RecordToList as, V.RMap as) =>
107− EndpointOption
108− { eoCall :: V.Curried as (IO (Either InteractionError (NonEmpty (Dynamic, Int)))),
109− eoArgs :: V.Rec (TypedF StashValue) as
110− }
111−
112−data StopReason
113− = TimedOut
114− | HitMaxIterations
115− deriving (Show, Eq)
116−
117−data Report
118− = Report
119− { textual :: String,
120− rsException :: RoboservantException
121− }
122− deriving (Show)
123−
124−
125−
126−-- fuzzClient :: Client api -> Config -> IO (Maybe Report)
127−-- fuzzClient = undefined
128−
129−
130−
131−fuzz' ::
132− ReifiedApi ->
133− Config ->
134− IO (Maybe Report)
135−fuzz' reifiedApi Config {..} = handle (pure . Just . formatException) $ do
136− let path = []
137− stash = addToStash seed mempty
138− currentRng = mkStdGen rngSeed
139− deadline :: UTCTime <- addUTCTime (realToFrac $ maxRuntime * 1000000) <$> getCurrentTime
140− (stopreason, _fs) <-
141− runStateT
142− (untilDone (maxReps, deadline) go <* (evaluateCoverage =<< get))
143− FuzzState {..}
144− logInfo $ show stopreason
145− pure Nothing
146− where
147− -- something less terrible later
148− formatException :: RoboservantException -> Report
149− formatException r@(RoboservantException failureType exception _state) =
150− Report
151− (unlines [show failureType, show exception])
152− r
153− displayDiagnostics FuzzState {..} = liftIO $
154− logInfo $ unlines $
155− ["api endpoints covered"]
156− <> (map show . Set.toList . Set.fromList $ map apiOffset path)
157− <> ["", "types in stash"]
158− <> DM.foldrWithKey (\_ v r -> (show . NEL.length . getStashValue $ v) : r) [] (getStash stash)
159− -- <> (map (show . NEL.length . getStashValue ) $ DM.assocs (getStash stash))
160− -- $ \_k v ->
161− -- (show . NEL.length $ getStashValue v))
162−
163− evaluateCoverage f@FuzzState {..}
164− | coverage > coverageThreshold = pure ()
165− | otherwise = do
166− displayDiagnostics f
167− throw $ RoboservantException (InsufficientCoverage coverage) Nothing f
168− where
169− hitRoutes = fromIntegral . Set.size . Set.fromList $ map apiOffset path
170− totalRoutes = fromIntegral routeCount
171− coverage = hitRoutes / totalRoutes
172− untilDone :: MonadIO m => (Integer, UTCTime) -> m a -> m StopReason
173− untilDone (0, _) _ = pure HitMaxIterations
174− untilDone (n, deadline) action = do
175− now <- liftIO getCurrentTime
176− if now > deadline
177− then pure TimedOut
178− else do
179− _ <- action
180− untilDone (n -1, deadline) action
181−
182− routeCount = length reifiedApi
183− elementOrFail ::
184− (MonadState FuzzState m, MonadIO m) =>
185− [a] ->
186− m a
187− elementOrFail [] = liftIO . throw . RoboservantException NoPossibleMoves Nothing =<< get
188− elementOrFail l = do
189− st <- get
190− let (index, newGen) = randomR (0, length l - 1) (currentRng st)
191− modify' $ \st' -> st' {currentRng = newGen}
192− pure (l !! index)
193− withOp ::
194− (MonadState FuzzState m, MonadIO m) =>
195− ( forall as.
196− (V.RecordToList as, V.RMap as) =>
197− FuzzOp ->
198− V.Curried as (IO (Either InteractionError (NonEmpty (Dynamic, Int)))) ->
199− V.Rec (TypedF V.Identity) as ->
200− m r
201− ) ->
202− m r
203− withOp callback = do
204− -- choose a call to make, from the endpoints with fillable arguments.
205− (offset, EndpointOption {..}) <- elementOrFail . options =<< get
206− r <-
207− V.rtraverse
208− ( \(tr :*: StashValue svs _) ->
209− elementOrFail $
210− zipWith
211− (\i xy -> V.Const i :*: tr :*: xy)
212− [0 ..]
213− (NEL.toList svs)
214− )
215− eoArgs
216− let pathSegment =
217− FuzzOp offset $
218− recordToList'
219− (\(V.Const index :*: tr :*: _) -> Provenance (R.SomeTypeRep tr) index)
220− r
221− argValues =
222− V.rmap
223− (\(_ :*: tr :*: (_, x)) -> tr :*: V.Identity x)
224− r
225− modify' (\f -> f {path = path f <> [pathSegment]})
226− callback pathSegment eoCall argValues
227− where
228− options :: FuzzState -> [(ApiOffset, EndpointOption)]
229− options FuzzState {..} =
230− mapMaybe
231− ( \(offset, ReifiedEndpoint {..}) -> do
232− args <- V.rtraverse (\(tr :*: Argument bf) -> (tr :*:) <$> bf stash) reArguments
233− pure (offset, EndpointOption reEndpointFunc args)
234− )
235− reifiedApi
236− execute ::
237− (MonadState FuzzState m, MonadIO m, V.RecordToList as, V.RMap as) =>
238− FuzzOp ->
239− V.Curried as (IO (Either InteractionError (NonEmpty (Dynamic, Int)))) ->
240− V.Rec (TypedF V.Identity) as ->
241− m ()
242− execute fuzzop func args = do
243− (liftIO . logInfo . show . (fuzzop,) . stash) =<< get
244− liftIO (V.runcurry' func argVals) >>= \case
245− Left (e::InteractionError) ->
246− if fatalError e
247− then throw e
248− else pure ()
249− Right (dyn :: NEL.NonEmpty (Dynamic, Int)) ->
250− modify'
251− ( \fs@FuzzState {..} ->
252− fs {stash = addToStash (NEL.toList dyn) stash}
253− )
254− where
255− argVals = V.rmap (\(_ :*: V.Identity x) -> V.Identity x) args
256− -- argTypes = recordToList' (\(tr :*: _) -> R.SomeTypeRep tr) args
257− go ::
258− (MonadState FuzzState m, MonadIO m, MonadBaseControl IO m) =>
259− m ()
260− go = withOp $ \op func args -> do
261− catches
262− (execute op func args)
263− [ Handler (\(e :: SomeAsyncException) -> throw e),
264− Handler
265− ( \(e :: SomeException) ->
266− throw . RoboservantException ServerCrashed (Just e) =<< get
267− )
268− ]
269− catch
270− (liftIO healthCheck)
271− (\(e :: SomeException) -> throw . RoboservantException CheckerFailed (Just e) =<< get)
272−
273−addToStash ::
274− [(Dynamic, Int)] ->
275− Stash ->
276− Stash
277−addToStash result stash =
278− foldr
279− ( \(Dynamic tr x, hashed) (Stash dict) ->
280− Stash $
281− DM.insertWith
282− renumber
283− tr
284− (StashValue (([Provenance (R.SomeTypeRep tr) 0], x) :| []) (IntSet.singleton hashed))
285− dict
286− )
287− stash
288− result
289− where
290− renumber ::
291− StashValue a ->
292− StashValue a ->
293− StashValue a
294− renumber (StashValue singleDyn singleHash) orig@(StashValue l intSet)
295− | not $ IntSet.null (singleHash `IntSet.intersection` intSet) = orig
296− | otherwise =
297− StashValue
298− ( case NEL.toList singleDyn of
299− [([Provenance tr _], dyn)] ->
300− l <> pure ([Provenance tr (length (NEL.last l) + 1)], dyn)
301− _ -> error "should be impossible"
302− )
303− (IntSet.union singleHash intSet)
304−
305−-- why isn't this in vinyl?
306−recordToList' ::
307− (V.RecordToList as, V.RMap as) =>
308− (forall x. f x -> a) ->
309− V.Rec f as ->
310− [a]
311−recordToList' f = V.recordToList . V.rmap (V.Const . f)
src/Roboservant/Server.hsdeleted−36
@@ -1,36 +0,0 @@
1−{-# LANGUAGE RankNTypes #-}
2−{-# LANGUAGE TypeApplications #-}
3−{-# LANGUAGE PolyKinds #-}
4−{-# LANGUAGE AllowAmbiguousTypes #-}
5−{-# LANGUAGE FlexibleContexts #-}
6−{-# LANGUAGE GADTs #-}
7−{-# LANGUAGE PolyKinds #-}
8−
9−{-# LANGUAGE ScopedTypeVariables #-}
10−{-# LANGUAGE TypeApplications #-}
11−{-# LANGUAGE TypeFamilies #-}
12−{-# LANGUAGE UndecidableInstances #-}
13−
14−module Roboservant.Server (fuzz, module Roboservant.Types ) where
15−
16−import Roboservant.Direct(fuzz',Report)
17−import Roboservant.Types
18− ( FlattenServer (..),
19− ReifiedApi,
20− )
21−import Roboservant.Types.ReifiedApi.Server(ToReifiedApi (..))
22−import Servant (Endpoints, Proxy (Proxy), Server)
23−import Roboservant.Types.Config
24−
25−fuzz :: forall api.
26− (FlattenServer api, ToReifiedApi (Endpoints api)) =>
27− Server api ->
28− Config ->
29− IO (Maybe Report)
30−fuzz s = fuzz' (reifyServer s)
31− -- todo: how do we pull reifyServer out?
32− where reifyServer :: (FlattenServer api, ToReifiedApi (Endpoints api))
33− => Server api -> ReifiedApi
34− reifyServer server = toReifiedApi (flattenServer @api server) (Proxy @(Endpoints api))
35−-- reifyServer server = toReifiedApi server (Proxy @(Endpoints api))
36−
src/Roboservant/StateMachine.hsnew file+142
@@ -0,0 +1,142 @@
1+{-# LANGUAGE AllowAmbiguousTypes #-}
2+{-# LANGUAGE DataKinds #-}
3+{-# LANGUAGE DerivingStrategies #-}
4+{-# LANGUAGE FlexibleContexts #-}
5+{-# LANGUAGE FlexibleInstances #-}
6+{-# LANGUAGE GADTs #-}
7+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
8+{-# LANGUAGE LambdaCase #-}
9+{-# LANGUAGE PolyKinds #-}
10+{-# LANGUAGE RecordWildCards #-}
11+{-# LANGUAGE ScopedTypeVariables #-}
12+{-# LANGUAGE StandaloneDeriving #-}
13+{-# LANGUAGE TupleSections #-}
14+{-# LANGUAGE TypeApplications #-}
15+{-# LANGUAGE TypeFamilies #-}
16+{-# LANGUAGE TypeOperators #-}
17+{-# LANGUAGE UndecidableInstances #-}
18+
19+module Roboservant.StateMachine
20+( prop_sequential
21+, prop_concurrent
22+) where
23+
24+import Control.Monad.IO.Class (MonadIO, liftIO)
25+import Data.Dynamic (Dynamic, dynApply, dynTypeRep, fromDynamic)
26+import Data.IORef (IORef, newIORef)
27+import qualified Data.List.NonEmpty as NEL
28+import qualified Data.Map.Strict as Map
29+import Data.Maybe (mapMaybe)
30+import Data.Typeable (TypeRep)
31+import GHC.IORef (readIORef)
32+import Hedgehog
33+import qualified Hedgehog.Gen as Gen
34+import qualified Hedgehog.Range as Range
35+import Servant
36+import Type.Reflection (SomeTypeRep)
37+
38+import Roboservant.Types
39+
40+callEndpoint :: (MonadGen n, MonadIO m) => ReifiedApi -> [Dynamic] -> Command n m State
41+callEndpoint staticRoutes seed =
42+ let gen :: MonadGen n => State Symbolic -> Maybe (n (Op Symbolic))
43+ gen State {..}
44+ | any null options = Nothing
45+ | otherwise = Just $ do
46+ uncurry Op <$> chooseOne options
47+ where
48+ chooseOne ::
49+ MonadGen n =>
50+ [ ( ApiOffset,
51+ [(TypeRep, [Var (Opaque (IORef Dynamic)) Symbolic])]
52+ )
53+ ] ->
54+ n
55+ ( ApiOffset,
56+ [(TypeRep, Var (Opaque (IORef Dynamic)) Symbolic)]
57+ )
58+ chooseOne opts = do
59+ (offset, args) <- Gen.element opts
60+ (offset,) <$> mapM (\(tr, argOpts) -> (tr,) <$> Gen.element argOpts) args
61+ options :: [(ApiOffset, [(TypeRep, [Var (Opaque (IORef Dynamic)) Symbolic])])]
62+ options =
63+ mapMaybe
64+ ( \(offset, argreps, _retType, _dynCall) -> (offset,) <$> do
65+ mapM (\x -> (x,) <$> fillableWith x) argreps
66+ )
67+ staticRoutes
68+ fillableWith :: TypeRep -> Maybe [Var (Opaque (IORef Dynamic)) Symbolic]
69+ fillableWith tr = NEL.toList <$> Map.lookup tr stateRefs
70+ execute ::
71+ (MonadIO m) =>
72+ Op Concrete ->
73+ m (Opaque (IORef Dynamic))
74+ execute (Preload tr v) = fmap Opaque . liftIO $ do
75+ newIORef . concrete $ v
76+ --fmap Opaque . liftIO $
77+-- _ v
78+ execute (Op (ApiOffset offset) args) = do
79+ -- traceM (show (offset, args))
80+ fmap Opaque . liftIO $ do
81+ realArgs <- mapM (\(_tr, v) -> readIORef (opaque v)) args
82+ let (_offset, _staticArgs, _ret, endpoint) = staticRoutes !! offset
83+ -- now, magic happens: we apply some dynamic arguments to a dynamic
84+ -- function and hopefully somtehing useful pops out the end.
85+ func = foldr (\arg curr -> flip dynApply arg =<< curr) (Just endpoint) realArgs
86+ let showable = map dynTypeRep (endpoint : realArgs)
87+ case func of
88+ Nothing -> error ("all screwed up: " <> maybe ("nothing: " <> show showable) (show . dynTypeRep) func)
89+ Just (f') -> do
90+ case fromDynamic f' of
91+ Nothing -> error ("all screwed up: " <> maybe ("nothing: " <> show showable) (show . dynTypeRep) func)
92+ Just f -> liftIO f >>= \case
93+ Left (serverError :: ServerError) -> error (show serverError)
94+ Right (_typeRep :: SomeTypeRep, (dyn :: Dynamic)) -> newIORef dyn
95+ in Command
96+ gen
97+ execute
98+ [ Update $ \s@State {..} op o' ->
99+ case op of
100+ Preload tr v -> s { stateRefs =
101+ Map.insertWith (<>) tr (pure o') stateRefs }
102+ (Op (ApiOffset offset) _args) ->
103+ s
104+ { stateRefs =
105+ let (_, _, tr, _) = staticRoutes !! offset
106+ in Map.insertWith
107+ (<>)
108+ tr
109+ (pure o')
110+ stateRefs
111+ }
112+ -- , Ensure (no-500 here)
113+ ]
114+
115+prop_sequential :: forall api. (FlattenServer api, ToReifiedApi (Endpoints api)) => Server api -> [Dynamic] -> PropertyT IO ()
116+prop_sequential server seed = do
117+ let reifiedApi = toReifiedApi (flattenServer @api server) (Proxy @(Endpoints api))
118+ -- refs <- Map.fromList <$> mapM (\d -> (dynTypeRep d,) <$> newIORef d) seed
119+
120+ actions <-
121+ forAll $ do
122+ Gen.sequential
123+ (Range.linear 1 100)
124+ (State mempty)
125+ [callEndpoint reifiedApi seed]
126+
127+ executeSequential (undefined) actions
128+
129+prop_concurrent :: forall api. (FlattenServer api, ToReifiedApi (Endpoints api)) => Server api -> PropertyT IO ()
130+prop_concurrent server =
131+ let reifiedApi = toReifiedApi (flattenServer @api server) (Proxy @(Endpoints api)) in
132+ let initialState = State mempty
133+ in do
134+ actions <-
135+ forAll $
136+ Gen.parallel
137+ (Range.linear 1 50)
138+ (Range.linear 1 10)
139+ initialState
140+ [callEndpoint reifiedApi []]
141+ test $
142+ executeParallel initialState actions
src/Roboservant/Types.hs+180−17
@@ -2,25 +2,188 @@
2{-# LANGUAGE DataKinds #-}
2{-# LANGUAGE DataKinds #-}
3{-# LANGUAGE DerivingStrategies #-}
3{-# LANGUAGE DerivingStrategies #-}
4{-# LANGUAGE FlexibleInstances #-}
4{-# LANGUAGE FlexibleInstances #-}
5+{-# LANGUAGE GADTs #-}
6+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
7+{-# LANGUAGE LambdaCase #-}
5{-# LANGUAGE PolyKinds #-}
8{-# LANGUAGE PolyKinds #-}
6{-# LANGUAGE ScopedTypeVariables #-}
9{-# LANGUAGE ScopedTypeVariables #-}
10+{-# LANGUAGE StandaloneDeriving #-}
11+{-# LANGUAGE TupleSections #-}
12+{-# LANGUAGE TypeApplications #-}
7{-# LANGUAGE TypeFamilies #-}
13{-# LANGUAGE TypeFamilies #-}
14+{-# LANGUAGE TypeOperators #-}
8{-# LANGUAGE UndecidableInstances #-}
15{-# LANGUAGE UndecidableInstances #-}
9
16
10−module Roboservant.Types
17+module Roboservant.Types where
11− ( module Roboservant.Types.Breakdown,
18+
12− module Roboservant.Types.BuildFrom,
19+import Control.Monad.Except (runExceptT)
13− module Roboservant.Types.ReifiedApi,
20+import Data.Dynamic (Dynamic, toDyn)
14− module Roboservant.Types.ReifiedApi.Server,
21+import Data.Function ((&))
15− module Roboservant.Types.Internal,
22+import Data.IORef (IORef)
16− module Roboservant.Types.Config,
23+import Data.List.NonEmpty (NonEmpty)
17− )
24+import Data.Map.Strict (Map)
18−where
25+import Data.Typeable (TypeRep, Typeable, typeRep)
19−
26+import GHC.TypeLits (Symbol)
20−import Roboservant.Types.Breakdown
27+import Hedgehog
21−import Roboservant.Types.BuildFrom
28+import Servant
22−import Roboservant.Types.Config
29+import Servant.API.Modifiers
23−import Roboservant.Types.Internal
30+
24−import Roboservant.Types.ReifiedApi
31+data State v
25−import Roboservant.Types.ReifiedApi.Server
32+ = State
26−import Roboservant.Types.Orphans()
33+ { stateRefs :: Map TypeRep (NonEmpty (Var (Opaque (IORef Dynamic)) v))
34+ }
35+
36+class FlattenServer api where
37+ flattenServer :: Server api -> Bundled (Endpoints api)
38+
39+instance
40+ ( Endpoints (endpoint :<|> api) ~ (endpoint ': Endpoints api),
41+ Server (endpoint :<|> api) ~ (Server endpoint :<|> Server api),
42+ FlattenServer api
43+ ) =>
44+ FlattenServer (endpoint :<|> api)
45+ where
46+ flattenServer (endpoint :<|> server) = endpoint `AnEndpoint` flattenServer @api server
47+
48+instance
49+ ( HasServer (x :> api) '[],
50+ Endpoints (x :> api) ~ '[x :> api]
51+ ) =>
52+ FlattenServer (x :> api)
53+ where
54+ flattenServer server = server `AnEndpoint` NoEndpoints
55+
56+instance
57+ ( HasServer (Verb method statusCode contentTypes responseType) '[],
58+ Endpoints (Verb method statusCode contentTypes responseType) ~ '[Verb method statusCode contentTypes responseType]
59+ ) =>
60+ FlattenServer (Verb method statusCode contentTypes responseType)
61+ where
62+ flattenServer server = server `AnEndpoint` NoEndpoints
63+
64+type ReifiedEndpoint = ([TypeRep], TypeRep, Dynamic)
65+
66+type ReifiedApi = [(ApiOffset, [TypeRep], TypeRep, Dynamic)]
67+
68+data Bundled endpoints where
69+ AnEndpoint :: Server endpoint -> Bundled endpoints -> Bundled (endpoint ': endpoints)
70+ NoEndpoints :: Bundled '[]
71+
72+class ToReifiedApi (endpoints :: [*]) where
73+ toReifiedApi :: Bundled endpoints -> Proxy endpoints -> ReifiedApi
74+
75+class ToReifiedEndpoint (endpoint :: *) where
76+ toReifiedEndpoint :: Dynamic -> Proxy endpoint -> ReifiedEndpoint
77+
78+instance ToReifiedApi '[] where
79+ toReifiedApi NoEndpoints _ = []
80+
81+instance
82+ (Typeable (Normal (ServerT endpoint Handler)), NormalizeFunction (ServerT endpoint Handler), ToReifiedEndpoint endpoint, ToReifiedApi endpoints, Typeable (ServerT endpoint Handler)) =>
83+ ToReifiedApi (endpoint : endpoints)
84+ where
85+ toReifiedApi (endpoint `AnEndpoint` endpoints) _ =
86+ withOffset (toReifiedEndpoint (toDyn (normalize endpoint)) (Proxy @endpoint))
87+ : map
88+ (\(n, x, y, z) -> (n + 1, x, y, z))
89+ (toReifiedApi endpoints (Proxy @endpoints))
90+ where
91+ withOffset (x, y, z) = (0, x, y, z)
92+
93+class NormalizeFunction m where
94+ type Normal m
95+ normalize :: m -> Normal m
96+
97+instance NormalizeFunction x => NormalizeFunction (r -> x) where
98+ type Normal (r -> x) = r -> Normal x
99+ normalize = fmap normalize
100+
101+instance Typeable x => NormalizeFunction (Handler x) where
102+ type Normal (Handler x) = IO (Either ServerError (TypeRep, Dynamic))
103+ normalize handler = (runExceptT . runHandler') handler >>= \case
104+ Left serverError -> pure (Left serverError)
105+ Right x -> pure (Right (typeRep (Proxy @x), toDyn x))
106+
107+instance
108+ Typeable responseType =>
109+ ToReifiedEndpoint (Verb method statusCode contentTypes responseType)
110+ where
111+ toReifiedEndpoint endpoint _ =
112+ ([], typeRep (Proxy @responseType), endpoint)
113+
114+instance
115+ (ToReifiedEndpoint endpoint) =>
116+ ToReifiedEndpoint ((x :: Symbol) :> endpoint)
117+ where
118+ toReifiedEndpoint endpoint _ =
119+ toReifiedEndpoint endpoint (Proxy @endpoint)
120+
121+instance
122+ (ToReifiedEndpoint endpoint) =>
123+ ToReifiedEndpoint (Description s :> endpoint)
124+ where
125+ toReifiedEndpoint endpoint _ =
126+ toReifiedEndpoint endpoint (Proxy @endpoint)
127+
128+instance
129+ (ToReifiedEndpoint endpoint) =>
130+ ToReifiedEndpoint (Summary s :> endpoint)
131+ where
132+ toReifiedEndpoint endpoint _ =
133+ toReifiedEndpoint endpoint (Proxy @endpoint)
134+
135+instance
136+ (Typeable requestType, ToReifiedEndpoint endpoint) =>
137+ ToReifiedEndpoint (QueryFlag name :> endpoint)
138+ where
139+ toReifiedEndpoint endpoint _ =
140+ toReifiedEndpoint endpoint (Proxy @endpoint)
141+ & \(args, result, typeRepMap) -> (typeRep (Proxy @Bool) : args, result, typeRepMap)
142+
143+instance
144+ (Typeable (If (FoldRequired mods) paramType (Maybe paramType)), ToReifiedEndpoint endpoint, SBoolI (FoldRequired mods)) =>
145+ ToReifiedEndpoint (QueryParam' mods name paramType :> endpoint)
146+ where
147+ toReifiedEndpoint endpoint _ =
148+ toReifiedEndpoint endpoint (Proxy @endpoint)
149+ & \(args, result, typeRepMap) -> (typeRep (Proxy @(If (FoldRequired mods) paramType (Maybe paramType))) : args, result, typeRepMap)
150+
151+instance
152+ (Typeable (If (FoldRequired mods) headerType (Maybe headerType)), ToReifiedEndpoint endpoint, SBoolI (FoldRequired mods)) =>
153+ ToReifiedEndpoint (Header' mods headerName headerType :> endpoint)
154+ where
155+ toReifiedEndpoint endpoint _ =
156+ toReifiedEndpoint endpoint (Proxy @endpoint)
157+ & \(args, result, typeRepMap) -> (typeRep (Proxy @(If (FoldRequired mods) headerType (Maybe headerType))) : args, result, typeRepMap)
158+
159+instance
160+ (Typeable captureType, ToReifiedEndpoint endpoint) =>
161+ ToReifiedEndpoint (Capture' mods name captureType :> endpoint)
162+ where
163+ toReifiedEndpoint endpoint _ =
164+ toReifiedEndpoint endpoint (Proxy @endpoint)
165+ & \(args, result, typeRepMap) -> (typeRep (Proxy @captureType) : args, result, typeRepMap)
166+
167+instance
168+ (Typeable (If (FoldLenient mods) (Either String requestType) requestType), ToReifiedEndpoint endpoint, SBoolI (FoldLenient mods)) =>
169+ ToReifiedEndpoint (ReqBody' mods contentTypes requestType :> endpoint)
170+ where
171+ toReifiedEndpoint endpoint _ =
172+ toReifiedEndpoint endpoint (Proxy @endpoint)
173+ & \(args, result, typeRepMap) -> (typeRep (Proxy @(If (FoldLenient mods) (Either String requestType) requestType)) : args, result, typeRepMap)
174+
175+newtype ApiOffset = ApiOffset Int
176+ deriving (Eq, Show)
177+ deriving newtype (Enum, Num)
178+
179+-- | we need to specify an offset because it's entirely possible to have two
180+-- functions with the same arguments that do different things.
181+data Op (v :: * -> *) = Op ApiOffset [(TypeRep, Var (Opaque (IORef Dynamic)) v)]
182+ | Preload TypeRep (Var Dynamic v)
183+
184+deriving instance Show (Op Symbolic)
185+
186+instance HTraversable Op where
187+ htraverse r = \case
188+ Op offset args -> Op offset <$> traverse (\(t, v) -> (t,) <$> htraverse r v) args
189+ Preload tr v -> Preload tr <$> htraverse r v
src/Roboservant/Types/Breakdown.hsdeleted−81
@@ -1,81 +0,0 @@
1−{-# LANGUAGE AllowAmbiguousTypes #-}
2−{-# LANGUAGE DataKinds #-}
3−{-# LANGUAGE FlexibleContexts #-}
4−{-# LANGUAGE DerivingVia #-}
5−{-# LANGUAGE FlexibleInstances #-}
6−{-# LANGUAGE GADTs #-}
7−{-# LANGUAGE LambdaCase #-}
8−{-# LANGUAGE MultiParamTypeClasses #-}
9−{-# LANGUAGE PolyKinds #-}
10−{-# LANGUAGE ScopedTypeVariables #-}
11−{-# LANGUAGE StandaloneDeriving #-}
12−{-# LANGUAGE TypeFamilies #-}
13−{-# LANGUAGE TypeOperators #-}
14−{-# LANGUAGE UndecidableInstances #-}
15−
16−module Roboservant.Types.Breakdown where
17−
18−import Data.Dynamic (Dynamic)
19−import Data.Hashable
20−import Data.Kind
21−import Data.List.NonEmpty (NonEmpty (..))
22−import qualified Data.List.NonEmpty as NEL
23−import Data.Typeable (Typeable)
24−import GHC.Generics
25−import Roboservant.Types.Internal
26−import Servant
27−import Roboservant.Types.Orphans()
28−
29−breakdown ::
30− (Hashable x, Typeable x, Breakdown x) =>
31− x ->
32− NonEmpty (Dynamic, Int)
33−breakdown x = hashedDyn x :| breakdownExtras x
34−
35−class Breakdown x where
36− breakdownExtras :: x -> [(Dynamic, Int)]
37−
38−instance (Hashable x, Typeable x) => Breakdown (Atom x) where
39− breakdownExtras _ = []
40−
41−deriving via (Atom ()) instance Breakdown ()
42−
43−deriving via (Atom Int) instance Breakdown Int
44−deriving via (Atom Char) instance Breakdown Char
45−
46−deriving via (Compound (Maybe x)) instance (Typeable x, Hashable x, Breakdown x) => Breakdown (Maybe x)
47−
48−instance (Hashable x, Typeable x, Breakdown x) => Breakdown [x] where
49− breakdownExtras stash = concatMap (NEL.toList . breakdown) stash
50−
51−
52−class GBreakdown (f :: k -> Type) where
53− gBreakdownExtras :: f a -> [(Dynamic, Int)]
54−
55−instance (Hashable x, Typeable x, Generic x, GBreakdown (Rep x)) => Breakdown (Compound (x :: Type)) where
56− breakdownExtras = gBreakdownExtras . from . unCompound
57−
58−instance GBreakdown f => GBreakdown (M1 S c f) where
59− gBreakdownExtras (M1 f) = gBreakdownExtras f
60−
61−instance GBreakdown b => GBreakdown (M1 D a b) where
62− gBreakdownExtras (M1 f) = gBreakdownExtras f
63−
64−instance GBreakdown b => GBreakdown (M1 C a b) where
65− gBreakdownExtras (M1 f) = gBreakdownExtras f
66−
67−instance (GBreakdown a, GBreakdown b) => GBreakdown (a :*: b) where
68− gBreakdownExtras (a :*: b) = gBreakdownExtras a <> gBreakdownExtras b
69−
70−instance (GBreakdown a, GBreakdown b) => GBreakdown (a :+: b) where
71− gBreakdownExtras = \case
72− L1 a -> gBreakdownExtras a
73− R1 a -> gBreakdownExtras a
74−
75−instance (Hashable a, Typeable a, Breakdown a) => GBreakdown (K1 R a) where
76− gBreakdownExtras (K1 c) = NEL.toList $ breakdown c
77−
78−instance GBreakdown U1 where
79− gBreakdownExtras U1 = []
80−
81−deriving via (Atom NoContent) instance Breakdown NoContent
src/Roboservant/Types/BuildFrom.hsdeleted−107
@@ -1,107 +0,0 @@
1−{-# LANGUAGE AllowAmbiguousTypes #-}
2−{-# LANGUAGE DerivingVia #-}
3−{-# LANGUAGE FlexibleContexts #-}
4−{-# LANGUAGE FlexibleInstances #-}
5−{-# LANGUAGE PolyKinds #-}
6−{-# LANGUAGE ScopedTypeVariables #-}
7−{-# LANGUAGE StandaloneDeriving #-}
8−{-# LANGUAGE TypeApplications #-}
9−{-# LANGUAGE TypeFamilies #-}
10−{-# LANGUAGE TypeOperators #-}
11−{-# LANGUAGE UndecidableInstances #-}
12−
13−module Roboservant.Types.BuildFrom where
14−
15−import Data.List(nub)
16−import qualified Data.Dependent.Map as DM
17−import Data.Hashable
18−import qualified Data.IntSet as IntSet
19−import Data.Kind
20−import Data.List.NonEmpty (NonEmpty (..))
21−import qualified Data.List.NonEmpty as NEL
22−import Data.Typeable (Typeable)
23−import GHC.Generics
24−import Roboservant.Types.Internal
25−import qualified Type.Reflection as R
26−import Servant(NoContent)
27−import Roboservant.Types.Orphans()
28−
29−buildFrom :: forall x. (Hashable x, BuildFrom x, Typeable x) => Stash -> Maybe (StashValue x)
30−buildFrom = buildStash . buildFrom'
31− where
32− buildStash :: [([Provenance], x)] -> Maybe (StashValue x)
33− buildStash = fmap (foldr1 addStash . fmap promoteToStash) . NEL.nonEmpty
34− promoteToStash :: ([Provenance], x) -> StashValue x
35− promoteToStash (p, x) =
36− StashValue
37− (pure (p, x))
38− (IntSet.singleton (hash x))
39− addStash :: StashValue x -> StashValue x -> StashValue x
40− addStash old (StashValue newVal _) =
41− let insertableVals = NEL.filter ((`IntSet.notMember` stashHash old) . hash) newVal
42− in StashValue
43− (addListToNE (getStashValue old) insertableVals)
44− (IntSet.union (IntSet.fromList . map hash . fmap snd . NEL.toList $ newVal) (stashHash old))
45− addListToNE :: NonEmpty a -> [a] -> NonEmpty a
46− addListToNE ne l = NEL.fromList (NEL.toList ne <> l)
47−
48−buildFrom' :: forall x. (Hashable x, BuildFrom x, Typeable x) => Stash -> [([Provenance], x)]
49−buildFrom' stash =
50− maybe [] (NEL.toList . getStashValue) (DM.lookup R.typeRep (getStash stash))
51− <> extras stash
52−
53−class (Hashable x, Typeable x) => BuildFrom (x :: Type) where
54− extras :: Stash -> [([Provenance], x)]
55−
56−instance (Hashable x, Typeable x) => BuildFrom (Atom x) where
57− extras _ = []
58−
59−deriving via (Atom Bool) instance BuildFrom Bool
60−
61−deriving via (Compound (Maybe x)) instance (Typeable x, Hashable x, BuildFrom x) => BuildFrom (Maybe x)
62−
63−-- this isn't wonderful, but we need a hand-rolled instance for recursive datatypes right now.
64−-- with an arbitrary-ish interface, we could use a size parameter, rng access etc.
65−instance (Eq x, BuildFrom x) => BuildFrom [x] where
66− extras stash =
67− nub $ map (\xs -> (concatMap fst xs, map snd xs)) $ notpowerset $ buildFrom' @x stash
68− where
69− -- powerset creates way too much stuff. something better here eventually.
70− notpowerset xs = []:xs:map pure xs
71−
72−
73−instance (Hashable x, Typeable x, Generic x, GBuildFrom (Rep x)) => BuildFrom (Compound (x :: Type)) where
74− extras stash = fmap (Compound . to) <$> gExtras stash
75−
76−deriving via (Atom Int) instance BuildFrom Int
77−
78−deriving via (Atom Char) instance BuildFrom Char
79−
80−class GBuildFrom (f :: k -> Type) where
81− gExtras :: Stash -> [([Provenance], f a)]
82−
83−instance GBuildFrom b => GBuildFrom (M1 D a b) where
84− gExtras = fmap (fmap M1) . gExtras
85−
86−-- not recursion safe!
87−instance (GBuildFrom a, GBuildFrom b) => GBuildFrom (a :+: b) where
88− gExtras stash =
89− (fmap L1 <$> gExtras stash)
90− <> (fmap R1 <$> gExtras stash)
91−
92−instance (GBuildFrom a, GBuildFrom b) => GBuildFrom (a :*: b) where
93− gExtras stash = [(pa <> pb, a' :*: b') | (pa, a') <- gExtras stash, (pb, b') <- gExtras stash]
94−
95−instance GBuildFrom b => GBuildFrom (M1 C a b) where
96− gExtras = fmap (fmap M1) . gExtras
97−
98−instance GBuildFrom b => GBuildFrom (M1 S a b) where
99− gExtras = fmap (fmap M1) . gExtras
100−
101−instance BuildFrom a => GBuildFrom (K1 i a) where
102− gExtras = fmap (fmap K1) . buildFrom'
103−
104−instance GBuildFrom U1 where
105− gExtras _ = [([], U1)]
106−
107−deriving via (Atom NoContent) instance BuildFrom NoContent
src/Roboservant/Types/Config.hsdeleted−29
@@ -1,29 +0,0 @@
1−module Roboservant.Types.Config where
2−
3−import Data.Dynamic
4−
5−data Config
6− = Config
7− { seed :: [(Dynamic, Int)],
8− maxRuntime :: Double, -- seconds to test for
9− maxReps :: Integer,
10− rngSeed :: Int,
11− coverageThreshold :: Double,
12− logInfo :: String -> IO (),
13− healthCheck :: IO ()
14− }
15−
16−defaultConfig :: Config
17−defaultConfig =
18− Config
19− { seed = [],
20− maxRuntime = 0.5,
21− maxReps = 1000,
22− rngSeed = 0,
23− coverageThreshold = 0,
24− logInfo = const (pure ()),
25− healthCheck = pure ()
26− }
27−
28−noisyConfig :: Config
29−noisyConfig = defaultConfig {logInfo = print}
src/Roboservant/Types/Internal.hsdeleted−53
@@ -1,53 +0,0 @@
1−{-# LANGUAGE DeriveFunctor #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
5−
6−module Roboservant.Types.Internal where
7−
8−import qualified Data.Dependent.Map as DM
9−import Data.Dependent.Map (DMap)
10−import Data.Dependent.Sum
11−import Data.Dynamic (Dynamic, toDyn)
12−import Data.Hashable (Hashable, hash)
13−import Data.IntSet (IntSet)
14−import Data.List.NonEmpty (NonEmpty (..))
15−import qualified Data.Map.Strict as Map
16−import Data.Typeable (Typeable)
17−import GHC.Generics (Generic)
18−import qualified Type.Reflection as R
19−
20−data Provenance
21− = Provenance R.SomeTypeRep Int
22− deriving (Show, Eq, Generic)
23−
24−instance Hashable Provenance
25−
26−data StashValue a
27− = StashValue
28− { getStashValue :: NonEmpty ([Provenance], a),
29− stashHash :: IntSet
30− }
31− deriving (Functor, Show)
32−
33−-- wrap in newtype to give a custom Show instance, since the normal
34−-- instance for DMap is not happy since StashValue needs Show a to show
35−newtype Stash = Stash {getStash :: DMap R.TypeRep StashValue}
36− deriving (Semigroup, Monoid)
37−
38−instance Show Stash where
39− showsPrec i (Stash x) =
40− showsPrec i
41− $ Map.fromList . map (\(tr :=> StashValue vs _) -> (R.SomeTypeRep tr, fmap fst vs))
42− $ DM.toList x
43−
44−-- | Can't be built up from parts, can't be broken down further.
45−newtype Atom x = Atom {unAtom :: x}
46− deriving newtype (Hashable, Typeable,Eq)
47−
48−-- | can be broken down and built up from generic pieces
49−newtype Compound x = Compound {unCompound :: x}
50− deriving newtype (Hashable, Typeable, Eq)
51−
52−hashedDyn :: (Hashable a, Typeable a) => a -> (Dynamic, Int)
53−hashedDyn a = (toDyn a, hash a)
src/Roboservant/Types/Orphans.hsdeleted−7
@@ -1,7 +0,0 @@
1−{-# OPTIONS_GHC -fno-warn-orphans #-}
2−module Roboservant.Types.Orphans where
3−
4−import Servant
5−import Data.Hashable
6−
7−instance Hashable NoContent
src/Roboservant/Types/ReifiedApi.hsdeleted−217
@@ -1,217 +0,0 @@
1−-- | Description: ways to build a reified api from a servant description.
2−--
3−-- arguably this could be more general and be abstracted away from even relying on servant
4−-- but that's future work.
5−
6−{-# LANGUAGE AllowAmbiguousTypes #-}
7−{-# LANGUAGE DataKinds #-}
8−{-# LANGUAGE DerivingStrategies #-}
9−{-# LANGUAGE FlexibleContexts #-}
10−{-# LANGUAGE FlexibleInstances #-}
11−{-# LANGUAGE GADTs #-}
12−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
13−{-# LANGUAGE LambdaCase #-}
14−{-# LANGUAGE PolyKinds #-}
15−{-# LANGUAGE ScopedTypeVariables #-}
16−{-# LANGUAGE TypeApplications #-}
17−{-# LANGUAGE TypeFamilies #-}
18−{-# LANGUAGE TypeOperators #-}
19−{-# LANGUAGE UndecidableInstances #-}
20−{-# LANGUAGE CPP #-}
21−module Roboservant.Types.ReifiedApi where
22−
23−import Data.Dynamic (Dynamic)
24−import Control.Exception(Exception)
25−import Data.List.NonEmpty (NonEmpty)
26−import Data.Typeable (Typeable)
27−import GHC.Generics ((:*:)(..))
28−import Roboservant.Types.Internal
29−import Roboservant.Types.Breakdown
30−import Roboservant.Types.BuildFrom
31−import Data.Kind(Type)
32−import Servant
33−import Servant.API.Modifiers(FoldRequired,FoldLenient)
34−import GHC.TypeLits (Symbol)
35−import qualified Data.Text as T
36−import qualified Data.Vinyl as V
37−import qualified Data.Vinyl.Curry as V
38−import qualified Type.Reflection as R
39−
40−newtype ApiOffset = ApiOffset Int
41− deriving (Eq, Show, Ord)
42− deriving newtype (Enum, Num)
43−
44−type TypedF = (:*:) R.TypeRep
45−
46−newtype Argument a = Argument
47− { getArgument :: Stash -> Maybe (StashValue a)
48− }
49−
50−data ReifiedEndpoint = forall as. (V.RecordToList as, V.RMap as) => ReifiedEndpoint
51− { reArguments :: V.Rec (TypedF Argument) as
52− , reEndpointFunc :: V.Curried as (IO (Either InteractionError (NonEmpty (Dynamic,Int))))
53− }
54−
55−instance Show ReifiedEndpoint where
56− show _ = "lol"
57−
58−class ( V.RecordToList (EndpointArgs endpoint)
59− , V.RMap (EndpointArgs endpoint)
60− ) => ToReifiedEndpoint (endpoint :: Type) where
61− type EndpointArgs endpoint :: [Type]
62− type EndpointRes endpoint :: Type
63−
64− reifiedEndpointArguments :: V.Rec (TypedF Argument) (EndpointArgs endpoint)
65−
66−
67−tagType :: Typeable a => f a -> TypedF f a
68−tagType = (R.typeRep :*:)
69−
70−data InteractionError = InteractionError
71− { errorMessage :: T.Text
72− , fatalError :: Bool
73− }
74− deriving Show
75−instance Exception InteractionError
76−
77−
78−
79−instance
80− (Typeable responseType, Breakdown responseType) =>
81− ToReifiedEndpoint (Verb method statusCode contentTypes responseType)
82− where
83− type EndpointArgs (Verb method statusCode contentTypes responseType) = '[]
84− type EndpointRes (Verb method statusCode contentTypes responseType) = responseType
85− reifiedEndpointArguments = V.RNil
86−
87−instance ToReifiedEndpoint (NoContentVerb method)
88− where
89− type EndpointArgs (NoContentVerb method) = '[]
90− type EndpointRes (NoContentVerb method) = NoContent
91− reifiedEndpointArguments = V.RNil
92−
93−instance
94− (ToReifiedEndpoint endpoint) =>
95− ToReifiedEndpoint ((x :: Symbol) :> endpoint)
96− where
97− type EndpointArgs ((x :: Symbol) :> endpoint) = EndpointArgs endpoint
98− type EndpointRes ((x :: Symbol) :> endpoint) = EndpointRes endpoint
99− reifiedEndpointArguments = reifiedEndpointArguments @endpoint
100−
101−instance
102− (ToReifiedEndpoint endpoint) =>
103− ToReifiedEndpoint (RemoteHost :> endpoint)
104− where
105− type EndpointArgs (RemoteHost :> endpoint) = EndpointArgs endpoint
106− type EndpointRes (RemoteHost :> endpoint) = EndpointRes endpoint
107− reifiedEndpointArguments = reifiedEndpointArguments @endpoint
108−
109−
110−
111−instance
112− (ToReifiedEndpoint endpoint) =>
113− ToReifiedEndpoint (Description s :> endpoint)
114− where
115− type EndpointArgs (Description s :> endpoint) = EndpointArgs endpoint
116− type EndpointRes (Description s :> endpoint) = EndpointRes endpoint
117− reifiedEndpointArguments = reifiedEndpointArguments @endpoint
118−
119−instance
120− (ToReifiedEndpoint endpoint) =>
121− ToReifiedEndpoint (Summary s :> endpoint)
122− where
123− type EndpointArgs (Summary s :> endpoint) = EndpointArgs endpoint
124− type EndpointRes (Summary s :> endpoint) = EndpointRes endpoint
125− reifiedEndpointArguments = reifiedEndpointArguments @endpoint
126−
127−instance
128− (Typeable requestType
129− ,BuildFrom requestType
130− ,ToReifiedEndpoint endpoint) =>
131− ToReifiedEndpoint (QueryFlag name :> endpoint)
132− where
133− type EndpointArgs (QueryFlag name :> endpoint) = Bool ': EndpointArgs endpoint
134− type EndpointRes (QueryFlag name :> endpoint) = EndpointRes endpoint
135− reifiedEndpointArguments = tagType (Argument (buildFrom @Bool)) V.:& reifiedEndpointArguments @endpoint
136−
137−type IfLenient s mods t = If (FoldLenient mods) (Either s t) t
138−type IfRequired mods t = If (FoldRequired mods) t (Maybe t)
139−type IfRequiredLenient s mods t = IfRequired mods (IfLenient s mods t)
140−
141−instance
142− ( BuildFrom (IfRequiredLenient T.Text mods paramType)
143− , ToReifiedEndpoint endpoint
144− ) =>
145− ToReifiedEndpoint (QueryParam' mods name paramType :> endpoint)
146− where
147− type EndpointArgs (QueryParam' mods name paramType :> endpoint) = IfRequiredLenient T.Text mods paramType ': EndpointArgs endpoint
148− type EndpointRes (QueryParam' mods name paramType :> endpoint) = EndpointRes endpoint
149− reifiedEndpointArguments =
150− tagType (Argument (buildFrom @(IfRequiredLenient T.Text mods paramType)))
151− V.:& reifiedEndpointArguments @endpoint
152−
153−
154−instance
155− ( BuildFrom paramType
156− , ToReifiedEndpoint endpoint
157− , Show paramType
158− , Eq paramType
159− ) =>
160− ToReifiedEndpoint (QueryParams name paramType :> endpoint)
161− where
162− type EndpointArgs (QueryParams name paramType :> endpoint) = [paramType] ': EndpointArgs endpoint
163− type EndpointRes (QueryParams name paramType :> endpoint) = EndpointRes endpoint
164− reifiedEndpointArguments =
165− tagType (Argument (buildFrom @[paramType]))
166− V.:& reifiedEndpointArguments @endpoint
167−
168−
169−
170−
171−instance
172− ( BuildFrom (IfRequiredLenient T.Text mods headerType)
173− , ToReifiedEndpoint endpoint
174− ) =>
175− ToReifiedEndpoint (Header' mods headerName headerType :> endpoint)
176− where
177− type EndpointArgs (Header' mods headerName headerType :> endpoint) = IfRequiredLenient T.Text mods headerType ': EndpointArgs endpoint
178− type EndpointRes (Header' mods headerName headerType :> endpoint) = EndpointRes endpoint
179− reifiedEndpointArguments =
180− tagType (Argument (buildFrom @(IfRequiredLenient T.Text mods headerType)))
181− V.:& reifiedEndpointArguments @endpoint
182−
183−#if MIN_VERSION_servant(0,17,0)
184−instance
185− ( BuildFrom (IfLenient String mods captureType)
186− , ToReifiedEndpoint endpoint) =>
187− ToReifiedEndpoint (Capture' mods name captureType :> endpoint)
188− where
189− type EndpointArgs (Capture' mods name captureType :> endpoint) = IfLenient String mods captureType ': EndpointArgs endpoint
190− type EndpointRes (Capture' mods name captureType :> endpoint) = EndpointRes endpoint
191− reifiedEndpointArguments =
192− tagType (Argument (buildFrom @(IfLenient String mods captureType)))
193− V.:& reifiedEndpointArguments @endpoint
194−#else
195−instance
196− ( BuildFrom captureType
197− , ToReifiedEndpoint endpoint) =>
198− ToReifiedEndpoint (Capture' mods name captureType :> endpoint)
199− where
200− type EndpointArgs (Capture' mods name captureType :> endpoint) = captureType ': EndpointArgs endpoint
201− type EndpointRes (Capture' mods name captureType :> endpoint) = EndpointRes endpoint
202− reifiedEndpointArguments =
203− tagType (Argument (buildFrom @(captureType)))
204− V.:& reifiedEndpointArguments @endpoint
205−
206−#endif
207−
208−instance
209− ( BuildFrom (IfLenient String mods requestType)
210− , ToReifiedEndpoint endpoint) =>
211− ToReifiedEndpoint (ReqBody' mods contentTypes requestType :> endpoint)
212− where
213− type EndpointArgs (ReqBody' mods contentTypes requestType :> endpoint) = IfLenient String mods requestType ': EndpointArgs endpoint
214− type EndpointRes (ReqBody' mods contentTypes requestType :> endpoint) = EndpointRes endpoint
215− reifiedEndpointArguments =
216− tagType (Argument (buildFrom @(IfLenient String mods requestType)))
217− V.:& reifiedEndpointArguments @endpoint
src/Roboservant/Types/ReifiedApi/Server.hsdeleted−114
@@ -1,114 +0,0 @@
1−{-# LANGUAGE RankNTypes #-}
2−{-# LANGUAGE TypeApplications #-}
3−{-# LANGUAGE PolyKinds #-}
4−{-# LANGUAGE AllowAmbiguousTypes #-}
5−{-# LANGUAGE FlexibleContexts #-}
6−{-# LANGUAGE GADTs #-}
7−{-# LANGUAGE LambdaCase #-}
8−{-# LANGUAGE PolyKinds #-}
9−
10−{-# LANGUAGE ScopedTypeVariables #-}
11−{-# LANGUAGE TypeApplications #-}
12−{-# LANGUAGE TypeFamilies #-}
13−{-# LANGUAGE UndecidableInstances #-}
14−{-# LANGUAGE CPP #-}
15−{-# LANGUAGE DataKinds #-}
16−{-# LANGUAGE TypeOperators #-}
17−{-# LANGUAGE FlexibleInstances #-}
18−{-# LANGUAGE MultiParamTypeClasses #-}
19−module Roboservant.Types.ReifiedApi.Server(module Roboservant.Types.ReifiedApi.Server) where
20−
21−import Servant
22−
23−import Control.Monad.Except (runExceptT)
24−import Data.Bifunctor
25−import Data.Dynamic (Dynamic)
26−import Data.List.NonEmpty (NonEmpty)
27−import Data.Typeable (Typeable)
28−import Roboservant.Types.Breakdown
29−import Roboservant.Types.ReifiedApi
30−
31−import qualified Data.Text as T
32−import qualified Data.Vinyl.Curry as V
33−import Data.Hashable(Hashable)
34−
35−type ReifiedApi = [(ApiOffset, ReifiedEndpoint )]
36−
37−
38−class ToReifiedApi endpoints where
39− toReifiedApi :: Bundled endpoints -> Proxy endpoints -> ReifiedApi
40−
41−instance ToReifiedApi '[] where
42− toReifiedApi NoEndpoints _ = []
43−
44−instance
45− ( NormalizeFunction (ServerT endpoint Handler)
46− , Normal (ServerT endpoint Handler) ~ V.Curried (EndpointArgs endpoint) (IO (Either InteractionError (NonEmpty (Dynamic,Int))))
47− , ToReifiedEndpoint endpoint
48− , ToReifiedApi endpoints
49− ) =>
50− ToReifiedApi (endpoint : endpoints)
51− where
52− toReifiedApi (endpoint `AnEndpoint` endpoints) _ =
53− (0, ReifiedEndpoint
54− { reArguments = reifiedEndpointArguments @endpoint
55− , reEndpointFunc = normalize endpoint
56− }
57− )
58− : (map . first) (+1)
59− (toReifiedApi endpoints (Proxy @endpoints))
60−
61−
62−instance (Typeable x, Hashable x, Breakdown x) => NormalizeFunction (Handler x) where
63− type Normal (Handler x) = IO (Either InteractionError (NonEmpty (Dynamic,Int)))
64− normalize handler = (runExceptT . runHandler') handler >>= \case
65− Left serverError -> pure (Left (renderServerError serverError))
66− where
67− -- | TODO improve this
68− renderServerError :: ServerError -> InteractionError
69− renderServerError s = InteractionError (T.pack $ show s) (errHTTPCode serverError == 500)
70−
71− Right x -> pure $ Right $ breakdown x
72−
73−
74−-- case errHTTPCode serverError of
75−-- 500 -> throw serverError
76−-- _ ->
77−-- liftIO . logInfo . show $ ("ignoring non-500 error", serverError)
78−
79−
80−data Bundled endpoints where
81− -- AnEndpoint :: Server endpoint -> Bundled endpoints -> Bundled (endpoint ': endpoints)
82− AnEndpoint :: Server endpoint -> Bundled endpoints -> Bundled (endpoint ': endpoints)
83− NoEndpoints :: Bundled '[]
84−
85−class FlattenServer api where
86− flattenServer :: Server api -> Bundled (Endpoints api)
87−
88−instance
89− ( FlattenServer api,
90− Endpoints endpoint ~ '[endpoint]
91− ) =>
92− FlattenServer (endpoint :<|> api)
93− where
94− flattenServer (endpoint :<|> server) = endpoint `AnEndpoint` flattenServer @api server
95−
96−instance
97− (
98− Endpoints api ~ '[api]
99− ) =>
100− FlattenServer (x :> api)
101− where
102− flattenServer server = server `AnEndpoint` NoEndpoints
103−
104−instance FlattenServer (Verb method statusCode contentTypes responseType)
105− where
106− flattenServer server = server `AnEndpoint` NoEndpoints
107−
108−class NormalizeFunction m where
109− type Normal m
110− normalize :: m -> Normal m
111−
112−instance NormalizeFunction x => NormalizeFunction (r -> x) where
113− type Normal (r -> x) = r -> Normal x
114− normalize = fmap normalize
stack.yaml+18−5
@@ -1,10 +1,23 @@
1−resolver: lts-20.4
1+resolver: lts-16.14
2packages:
2packages:
3- .
3- .
4
4
5extra-deps:
5extra-deps:
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7−# - dependent-sum-0.7.1.0@sha256:5599aa89637db434431b1dd3fa7c34bc3d565ee44f0519bfbc877be1927c2531,2068
8- servant-flatten-0.2@sha256:276896f7c5cdec5b8f8493f6205fded0cc602d050b58fdb09a6d7c85c3bb0837,1234
6- servant-flatten-0.2@sha256:276896f7c5cdec5b8f8493f6205fded0cc602d050b58fdb09a6d7c85c3bb0837,1234
9−# - constraints-extras-0.3.0.2@sha256:013b8d0392582c6ca068e226718a4fe8be8e22321cc0634f6115505bf377ad26,1853
7+- markov-chain-usage-model-0.0.0@sha256:1afa95faeb9213c4d960a669190078b41b89169462b8edd910472980671ba8c0,2112
10−- some-1.0.3
8+- servant-0.18
9+- servant-client-0.18
10+- servant-client-core-0.18
11+- servant-server-0.18
12+# - hspec-hedgehog-0.0.1.2@sha256:aaeeb50a43d2bce8a1850baa3ddf934a964bfe38c64efd59306b0c1421e55b45,1405
13+- QuickCheck-2.14.1@sha256:01e46d7b0a8d3148288ec977625f62d5516ebb5031a50c63f0453863301b4a79,7736
14+- random-1.2.0
15+- splitmix-0.1.0.1@sha256:22f9662e7e8b173421872241edd39350078a9ed4bb9e9f503948c5b483c79276,5253
16+- git: https://github.com/hedgehogqa/haskell-hedgehog.git
17+ commit: 03714682586e43b5ddf5c00391035471a6e01238
18+ subdirs:
19+ - hedgehog
20+- git: https://github.com/mwotton/hspec
21+ commit: cd9012414a93cf08f86e409544d4d3a8f282b507
22+ subdirs:
23+ - hspec-core
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14- completed:
14- completed:
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21+- completed:
22+ hackage: servant-0.18@sha256:2b5c81089540c208b1945b5ca0c3551c862138d71b224a39fa275a62852a5c75,5068
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29+ hackage: servant-client-0.18@sha256:3e3b8d145cf811e19849744ad305aa0bd42301d01ff75e1dac169bc9f5d18221,4589
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31+ size: 1299
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42+- completed:
43+ hackage: servant-server-0.18@sha256:ec7f361bc9848968b1fff8091fa2213b721d3f47549421945c6a7ca1702e22e6,5424
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57+ hackage: random-1.2.0@sha256:4321209c8faedc034810ea8ed0dbc4a36f1a1df97b75af024219f2f533da57de,6094
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71+ subdir: hedgehog
72+ name: hedgehog
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74+ git: https://github.com/hedgehogqa/haskell-hedgehog.git
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81+ git: https://github.com/hedgehogqa/haskell-hedgehog.git
82+ commit: 03714682586e43b5ddf5c00391035471a6e01238
83+- completed:
84+ subdir: hspec-core
85+ name: hspec-core
86+ version: 2.7.4
87+ git: https://github.com/mwotton/hspec
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19 original:
92 original:
20− hackage: some-1.0.3
93+ subdir: hspec-core
94+ git: https://github.com/mwotton/hspec
95+ commit: cd9012414a93cf08f86e409544d4d3a8f282b507
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101+ original: lts-16.14
test/Breakdown.hsdeleted−50
@@ -1,50 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−{-# LANGUAGE OverloadedStrings #-}
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Breakdown where
9−
10−import Data.Aeson
11−import Data.Hashable
12−import Data.Typeable (Typeable)
13−import GHC.Generics (Generic)
14−import Servant
15−
16−data Foo = Foo Int String
17− deriving (Generic, Eq, Show, Typeable)
18−
19−instance Hashable Foo
20−
21−instance ToJSON Foo
22−
23−instance FromJSON Foo
24−
25−data SomeSum = A Int | B String
26− deriving (Generic, Eq, Show, Typeable)
27−
28−instance Hashable SomeSum
29−
30−instance ToJSON SomeSum
31−
32−instance FromJSON SomeSum
33−
34−type ProductApi =
35− "item" :> ReqBody '[JSON] Int :> Post '[JSON] ()
36− :<|> "getFoo" :> Get '[JSON] Foo
37−
38−eliminate :: Int -> Handler ()
39−eliminate _ = throwError $ err500 {errBody = "eliminate blew up, oh no!"}
40−
41−productServer :: Server ProductApi
42−productServer = eliminate :<|> pure (Foo 12 "abc")
43−
44−type SumApi =
45− "item" :> ReqBody '[JSON] Int :> Post '[JSON] ()
46− :<|> "getFoo1" :> Get '[JSON] SomeSum
47− :<|> "getFoo2" :> Get '[JSON] SomeSum
48−
49−sumServer :: Server SumApi
50−sumServer = eliminate :<|> pure (B "hi") :<|> pure (A 3)
test/Foo.hs+3−6
@@ -8,7 +8,6 @@
8module Foo where
8module Foo where
9
9
10import Data.Aeson
10import Data.Aeson
11−import Data.Hashable
12import Data.Typeable (Typeable)
11import Data.Typeable (Typeable)
13import GHC.Generics (Generic)
12import GHC.Generics (Generic)
14import Servant
13import Servant
@@ -17,13 +16,11 @@ newtype Foo = Foo Int
17 deriving (Generic, Eq, Show, Typeable)
16 deriving (Generic, Eq, Show, Typeable)
18 deriving newtype (FromHttpApiData, ToHttpApiData)
17 deriving newtype (FromHttpApiData, ToHttpApiData)
19
18
20−instance Hashable Foo
21−
22instance ToJSON Foo
19instance ToJSON Foo
23
20
24instance FromJSON Foo
21instance FromJSON Foo
25
22
26−type Api =
23+type FooApi =
27 "item" :> Get '[JSON] Foo
24 "item" :> Get '[JSON] Foo
28 :<|> "itemAdd" :> Capture "one" Foo :> Capture "two" Foo :> Get '[JSON] Foo
25 :<|> "itemAdd" :> Capture "one" Foo :> Capture "two" Foo :> Get '[JSON] Foo
29 :<|> "item" :> Capture "itemId" Foo :> Get '[JSON] ()
26 :<|> "item" :> Capture "itemId" Foo :> Get '[JSON] ()
@@ -39,8 +36,8 @@ eliminate (Foo a)
39 | a > 10 = throwError $ err500 {errBody = "eliminate blew up, oh no!"}
36 | a > 10 = throwError $ err500 {errBody = "eliminate blew up, oh no!"}
40 | otherwise = pure ()
37 | otherwise = pure ()
41
38
42−server :: Server Api
39+fooServer :: Server FooApi
43−server =
40+fooServer =
44 intro
41 intro
45 :<|> combine
42 :<|> combine
46 :<|> eliminate
43 :<|> eliminate
test/Headers.hs+2−4
@@ -8,7 +8,6 @@
8module Headers where
8module Headers where
9
9
10import Data.Aeson
10import Data.Aeson
11−import Data.Hashable
12import Data.Typeable (Typeable)
11import Data.Typeable (Typeable)
13import GHC.Generics (Generic)
12import GHC.Generics (Generic)
14import Servant
13import Servant
@@ -17,8 +16,6 @@ newtype Foo = Foo Int
17 deriving (Generic, Eq, Show, Typeable)
16 deriving (Generic, Eq, Show, Typeable)
18 deriving newtype (FromHttpApiData, ToHttpApiData)
17 deriving newtype (FromHttpApiData, ToHttpApiData)
19
18
20−instance Hashable Foo
21−
22instance ToJSON Foo
19instance ToJSON Foo
23
20
24instance FromJSON Foo
21instance FromJSON Foo
@@ -35,7 +32,8 @@ combine :: Maybe Foo -> Maybe Foo -> Handler Foo
35combine (Just (Foo a)) (Just (Foo b)) = pure (Foo (a + b))
32combine (Just (Foo a)) (Just (Foo b)) = pure (Foo (a + b))
36combine (Just a) Nothing = pure a
33combine (Just a) Nothing = pure a
37combine Nothing (Just a) = pure a
34combine Nothing (Just a) = pure a
38−combine Nothing Nothing = pure (Foo 1)
35+combine Nothing Nothing = pure (Foo 1)
36+
39
37
40eliminate :: Foo -> Handler ()
38eliminate :: Foo -> Handler ()
41eliminate (Foo a)
39eliminate (Foo a)
test/Nested.hsdeleted−23
@@ -1,23 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−{-# LANGUAGE OverloadedStrings #-}
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Nested where
9−
10−import Servant
11−import Servant.API.Flatten
12−
13−type Api =
14− ( "one" :> Summary "foo" :> Post '[JSON] Int
15− :<|> "two" :> Post '[JSON] Int
16− )
17− :<|> ( "three" :> Post '[JSON] Int
18− )
19−
20−type FlatApi = Flat Api
21−
22−server :: Server FlatApi
23−server = pure 1 :<|> pure 2 :<|> pure 3
test/Post.hsdeleted−31
@@ -1,31 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Post where
9−
10−import Data.Aeson
11−import Data.Hashable
12−import GHC.Generics (Generic)
13−import Servant
14−
15−type Api =
16− Get '[JSON] FooPost
17− :<|> ReqBody '[JSON] FooPost :> Post '[JSON] ()
18−
19−data FooPost = FooPost
20− deriving (Eq, Show, Generic)
21−
22−instance Hashable FooPost
23−
24−instance ToJSON FooPost
25−
26−instance FromJSON FooPost
27−
28−server :: Server Api
29−server =
30− pure FooPost
31− :<|> const (pure ())
test/Product.hsdeleted−31
@@ -1,31 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−{-# LANGUAGE OverloadedStrings #-}
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Product where
9−
10−import Data.Aeson
11−import Data.Hashable
12−import Data.Typeable (Typeable)
13−import GHC.Generics (Generic)
14−import Servant
15−
16−data Foo = Foo Int String
17− deriving (Generic, Eq, Show, Typeable)
18−
19−instance Hashable Foo
20−
21−instance ToJSON Foo
22−
23−instance FromJSON Foo
24−
25−type Api = "item" :> ReqBody '[JSON] Foo :> Post '[JSON] ()
26−
27−eliminate :: Foo -> Handler ()
28−eliminate (Foo _a _b) = throwError $ err500 {errBody = "eliminate blew up, oh no!"}
29−
30−server :: Server Api
31−server = eliminate
test/Put.hsdeleted−33
@@ -1,33 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Put where
9−
10−import Data.Aeson
11−import Data.Hashable
12−import GHC.Generics (Generic)
13−import Servant
14−
15−type Api =
16− Get '[JSON] Foo
17− :<|> ReqBody '[JSON] Foo :> Put '[JSON] ()
18− :<|> ReqBody '[JSON] Foo :> Put '[JSON] NoContent
19−
20−data Foo = Foo
21− deriving (Eq, Show, Generic)
22−
23−instance Hashable Foo
24−
25−instance ToJSON Foo
26−
27−instance FromJSON Foo
28−
29−server :: Server Api
30−server =
31− pure Foo
32− :<|> const (pure ())
33− :<|> const (pure NoContent)
test/QueryParams.hsdeleted−15
@@ -1,15 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−
6−{-# LANGUAGE TypeOperators #-}
7−
8−module QueryParams where
9−
10−import Servant
11−
12−type Api = QueryParams "ints" Int :> Get '[JSON] [Int]
13−
14−server :: Server Api
15−server = pure
test/Seeded.hsdeleted−33
@@ -1,33 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−{-# LANGUAGE GeneralizedNewtypeDeriving #-}
5−{-# LANGUAGE OverloadedStrings #-}
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Seeded where
9−
10−import Data.Aeson
11−import Data.Hashable
12−import Data.Typeable (Typeable)
13−import GHC.Generics (Generic)
14−import Servant
15−
16−newtype Seed = Seed Int
17− deriving (Generic, Eq, Show, Typeable)
18− deriving newtype (FromHttpApiData, ToHttpApiData)
19−
20−instance ToJSON Seed
21−
22−instance FromJSON Seed
23−
24−instance Hashable Seed
25−
26−type Api =
27− Capture "seed" Seed :> Get '[JSON] ()
28− :<|> Get '[JSON] ()
29−
30−server :: Server Api
31−server =
32− (\(Seed _) -> error "we blow up if we get here")
33− :<|> pure ()
test/Spec.hs+34−158
@@ -1,170 +1,46 @@
1−{-# LANGUAGE DerivingVia #-}
2−{-# LANGUAGE LambdaCase #-}
3{-# LANGUAGE OverloadedStrings #-}
1{-# LANGUAGE OverloadedStrings #-}
4−{-# LANGUAGE RecordWildCards #-}
5−{-# LANGUAGE StandaloneDeriving #-}
6{-# LANGUAGE TypeApplications #-}
2{-# LANGUAGE TypeApplications #-}
7−{-# LANGUAGE RankNTypes #-}
8−{-# LANGUAGE FlexibleContexts #-}
9−{-# LANGUAGE AllowAmbiguousTypes #-}
10−{-# LANGUAGE ScopedTypeVariables #-}
11−{-# LANGUAGE DataKinds #-}
12−{-# OPTIONS_GHC -fno-warn-orphans #-}
13−{-# LANGUAGE TypeFamilies #-}
14
3
15−import qualified Breakdown
16−import Data.Dynamic (toDyn)
17−import Data.Hashable (Hashable (hash))
18−import Data.Maybe (isNothing)
19−import Data.Void (Void)
20import qualified Foo
4import qualified Foo
21import qualified Headers
5import qualified Headers
22−import qualified Nested
6+import Hedgehog (Group (..), checkSequential, withTests)
23−import qualified Post
24−import qualified Put
25−import qualified Product
26−import qualified QueryParams
27−import qualified Roboservant as R
28−import qualified Roboservant.Server as RS
7+import qualified Roboservant as RS
29−import qualified Roboservant.Client as RC
8+import qualified UnsafeIO
30−import qualified Seeded
9+import Control.Monad(when)
10+import Test.Hspec.Hedgehog
31import Test.Hspec
11import Test.Hspec
32−import Test.Hspec.Core.Spec (FailureReason (Reason), ResultStatus (Failure, Success), itemExample, mapSpecItem_, resultStatus)
12+import Test.Hspec.Core.Spec(shouldFail)
33−import qualified Valid
13+import Control.Monad.Trans (MonadIO(liftIO))
34−import Servant ( Server, Proxy(..), serve, Endpoints, HasServer )
35
14
36−import Servant.Client(ClientEnv, mkClientEnv, baseUrlPort, parseBaseUrl,HasClient,ClientM)
15+-- -- | this is pretty bad. hopefully Jacob knows a better way of doing this.
37−import Network.Wai(Application)
16+-- -- https://twitter.com/mwotton/status/1305189249646460933
38−import qualified Network.Wai.Handler.Warp as Warp
17+-- assert :: String -> Bool -> IO ()
39−import Network.HTTP.Client (newManager, defaultManagerSettings)
18+-- assert _ True = pure ()
40−import Control.Monad((>=>))
19+-- assert err False = ioError $ userError err
41
20
42−main :: IO ()
43main = hspec spec
21main = hspec spec
44
22
45−fuzzBoth
46− :: forall a .
47− (R.ToReifiedApi (Endpoints a), HasServer a '[], RS.FlattenServer a, RC.ToReifiedClientApi (Endpoints a), RC.FlattenClient a,
48− HasClient ClientM a)
49− => String -> Server a -> R.Config -> (Maybe R.Report -> IO ()) -> Spec
50−fuzzBoth name server config condition = do
51− it (name <> " via server") $
52− RS.fuzz @a server config >>= condition
53−
54− around (withServer (serve (Proxy :: Proxy a) server)) $
55− it (name <> " via client") $ \(clientEnv::ClientEnv) -> do
56− RC.fuzz @a clientEnv config >>= condition
57−
58−withServer :: Application -> ActionWith ClientEnv -> IO ()
59−withServer app action = Warp.testWithApplication (pure app) (genClientEnv >=> action)
60− where genClientEnv port = do
61− baseUrl <- parseBaseUrl "http://localhost"
62− manager <- newManager defaultManagerSettings
63− pure $ mkClientEnv manager (baseUrl { baseUrlPort = port })
64−
65spec :: Spec
23spec :: Spec
66spec = do
24spec = do
67− describe "Basic usage" $ do
25+ describe "Foo" $ do
68− describe "noError" $ do
26+ --
69− fuzzBoth @Valid.Api "find no error in a basic app" Valid.server R.defaultConfig (`shouldSatisfy` isNothing)
70− fuzzBoth @Valid.RoutedApi "finds no error in a valid generic app" Valid.routedServer R.defaultConfig (`shouldSatisfy` isNothing)
71− fuzzBoth @Valid.Api "fails coverage check" Valid.server R.defaultConfig {R.coverageThreshold = 0.6}
72− (\r ->
73− fmap (R.failureReason . R.rsException) r
74− `shouldSatisfy` ( \case
75− Just (R.InsufficientCoverage _) -> True
76− _ -> False
77− ))
78− describe "posted body" $
79− fuzzBoth @Post.Api "passes a coverage check using a posted body" Post.server R.defaultConfig {R.coverageThreshold = 0.99}
80− (`shouldSatisfy` isNothing)
81−
82−
83− describe "PUTted body" $
84− fuzzBoth @Put.Api "passes a coverage check using a posted body" Put.server R.defaultConfig {R.coverageThreshold = 0.99}
85− (`shouldSatisfy` isNothing)
86−
87−
88− describe "seeded" $ do
89− let res = Seeded.Seed 1
90− shouldFail $ fuzzBoth @Seeded.Api "finds an error using information passed in" Seeded.server
27+ shouldFail $ it "finds an error" $
91− (R.defaultConfig {R.seed = [(toDyn res, hash res)]})
28+ (hedgehog $ RS.prop_sequential @Foo.FooApi Foo.fooServer [])
92− (`shouldSatisfy` isNothing)
29+
93−
94− describe "Foo" $
95− fuzzBoth @Foo.Api "finds an error in a basic app" Foo.server R.defaultConfig (`shouldSatisfy` serverFailure)
96−
97− describe "QueryParams" $
98− fuzzBoth @QueryParams.Api "can handle query params" QueryParams.server R.defaultConfig { R.seed = [R.hashedDyn (12::Int)] }
99− (`shouldSatisfy` isNothing)
100−
101− describe "BuildFrom" $ do
30+ describe "Headers" $ do
102− describe "headers (and sum types)" $
103− fuzzBoth @Headers.Api "should find a failure that's dependent on using header info" Headers.server R.defaultConfig
31+ shouldFail $ it "should find a failure that's dependent on using header info" $ do
104− (`shouldSatisfy` serverFailure)
32+ liftIO $ pendingWith "doesn't yet work"
105− describe "product types" $
33+ (hedgehog $ RS.prop_sequential @Headers.Api Headers.server [])
106− fuzzBoth @Product.Api "should find a failure that's dependent on creating a product" Product.server
34+
107− R.defaultConfig {R.seed = [R.hashedDyn 'a', R.hashedDyn (1 :: Int)]}
35+ -- -- The UnsafeIO checker does not actually really use the contextually aware stuff, though it
108− (`shouldSatisfy` serverFailure)
36+ -- -- could: it's mostly here to show how to test for concurrency problems.
109− describe "Breakdown" $ do
37+ before UnsafeIO.makeServer $ do
110− fuzzBoth @Breakdown.ProductApi "handles products" Breakdown.productServer R.defaultConfig
38+ describe "sequential checking" $ do
111− (`shouldSatisfy` serverFailure)
39+ it "safe use" $ \unsafeServer -> do
112− fuzzBoth @Breakdown.SumApi "handles sums" Breakdown.sumServer R.defaultConfig
40+ hedgehog $ RS.prop_sequential @UnsafeIO.UnsafeApi unsafeServer []
113− (`shouldSatisfy` serverFailure)
41+
114− describe "flattening" $
42+ modifyMaxSuccess (const 10000) $
115− fuzzBoth @Nested.FlatApi "can handle nested apis" Nested.server R.defaultConfig {R.coverageThreshold = 0.99}
43+ shouldFail $
116− (`shouldSatisfy` isNothing)
44+ describe "concurrent" $ do
117−
45+ it "concurrent, dangerous use" $ \unsafeServer -> do
118−serverFailure :: Maybe R.Report -> Bool
46+ RS.prop_concurrent @UnsafeIO.UnsafeApi unsafeServer
119−serverFailure = \case
120− Just R.Report {..} ->
121− let R.RoboservantException {..} = rsException
122− in failureReason /= R.NoPossibleMoves
123− _ -> False
124−
125−deriving via (R.Atom Foo.Foo) instance R.Breakdown Foo.Foo
126−
127−deriving via (R.Atom Foo.Foo) instance R.BuildFrom Foo.Foo
128−
129−deriving via (R.Atom Headers.Foo) instance R.Breakdown Headers.Foo
130−
131−deriving via (R.Atom Headers.Foo) instance R.BuildFrom Headers.Foo
132−
133−deriving via (R.Atom Seeded.Seed) instance R.Breakdown Seeded.Seed
134−
135−deriving via (R.Atom Seeded.Seed) instance R.BuildFrom Seeded.Seed
136−
137−deriving via (R.Atom Void) instance R.BuildFrom Void
138−
139−deriving via (R.Atom Post.FooPost) instance R.Breakdown Post.FooPost
140−deriving via (R.Atom Post.FooPost) instance R.BuildFrom Post.FooPost
141−
142−deriving via (R.Atom Put.Foo) instance R.Breakdown Put.Foo
143−deriving via (R.Atom Put.Foo) instance R.BuildFrom Put.Foo
144−
145−
146−
147−deriving via (R.Compound Breakdown.Foo) instance R.Breakdown Breakdown.Foo
148−
149−deriving via (R.Compound Product.Foo) instance R.BuildFrom Product.Foo
150−
151−deriving via (R.Compound Breakdown.SomeSum) instance R.Breakdown Breakdown.SomeSum
152−
153−-- | `shouldFail` allows you to assert that a given `Spec` should contain at least one failing test.
154−-- this is often useful when testing tests.
155−shouldFail :: SpecWith a -> SpecWith a
156−shouldFail =
157− mapSpecItem_
158− ( \i ->
159− i
160− { itemExample = \p a cb -> do
161− r <- itemExample i p a cb
162− pure
163− r
164− { resultStatus = case resultStatus r of
165− Success -> Failure Nothing (Reason "Unexpected success")
166− Failure _ _ -> Success
167− x -> x
168− }
169− }
170− )
test/UnsafeIO.hs+15−13
@@ -1,39 +1,41 @@
1{-# LANGUAGE DataKinds #-}
1{-# LANGUAGE DataKinds #-}
2−
2+{-# LANGUAGE DeriveGeneric #-}
3{-# LANGUAGE DerivingStrategies #-}
3{-# LANGUAGE DerivingStrategies #-}
4−
4+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
5{-# LANGUAGE OverloadedStrings #-}
5{-# LANGUAGE OverloadedStrings #-}
6{-# LANGUAGE TypeOperators #-}
6{-# LANGUAGE TypeOperators #-}
7
7
8module UnsafeIO where
8module UnsafeIO where
9
9
10−import Control.Monad.Trans (MonadIO (liftIO))
11−import Data.Aeson ()
10+import Data.Aeson()
12−import qualified Data.ByteString.Lazy.Char8 as BL8
13−import Data.IORef (IORef, newIORef, readIORef, writeIORef)
14import Servant
11import Servant
12+import Data.IORef (writeIORef, IORef, readIORef, newIORef)
13+import Control.Monad.Trans (MonadIO(liftIO))
14+import qualified Data.ByteString.Lazy.Char8 as BL8
15+
15
16
16type UnsafeApi =
17type UnsafeApi =
17 "add" :> Get '[JSON] ()
18 "add" :> Get '[JSON] ()
18− :<|> "healthcheck" :> Get '[JSON] ()
19+ :<|> "healthcheck" :> Get '[JSON] ()
19
20
20healthcheck :: IORef Int -> Handler ()
21healthcheck :: IORef Int -> Handler ()
21healthcheck ref = do
22healthcheck ref = do
22 t <- liftIO $ readIORef ref
23 t <- liftIO $ readIORef ref
23 case t of
24 case t of
24 0 -> pure ()
25 0 -> pure ()
25− n -> throwError $ err500 {errBody = "observed inconsistency: " <> BL8.pack (show n)}
26+ n -> throwError $ err500 {errBody = "observed inconsistency: " <> (BL8.pack $ show n)}
27+
28+
26
29
27makeServer :: IO (Server UnsafeApi)
30makeServer :: IO (Server UnsafeApi)
28makeServer = do
31makeServer = do
29 ref <- newIORef 0
32 ref <- newIORef 0
30− pure $
33+ pure $ unsafeMunge ref
31− unsafeMunge ref
32− :<|> healthcheck ref
34+ :<|> healthcheck ref
33
35
34unsafeMunge :: IORef Int -> Handler ()
36unsafeMunge :: IORef Int -> Handler ()
35unsafeMunge ref = liftIO $ do
37unsafeMunge ref = liftIO $ do
36 t <- readIORef ref
38 t <- readIORef ref
37− writeIORef ref (t + 1)
39+ writeIORef ref (t+1)
38 t2 <- readIORef ref
40 t2 <- readIORef ref
39− writeIORef ref (t2 -1)
41+ writeIORef ref (t2-1)
test/Valid.hsdeleted−44
@@ -1,44 +0,0 @@
1−{-# LANGUAGE DataKinds #-}
2−{-# LANGUAGE DeriveGeneric #-}
3−{-# LANGUAGE DerivingStrategies #-}
4−
5−{-# LANGUAGE OverloadedStrings #-}
6−{-# LANGUAGE TypeOperators #-}
7−
8−module Valid where
9−
10−import Data.Void
11−import GHC.Generics
12−import Servant
13−import Servant.Server.Generic
14−
15−type Api =
16− Get '[JSON] Int
17− :<|> Capture "void" Void :> Get '[JSON] ()
18−
19−data Routes route
20− = Routes
21− { getInt ::
22− route
23− :- Summary "i'm a summary!" :> Get '[JSON] Int,
24− captureIt ::
25− route
26− :- Capture "void" Void :> Get '[JSON] ()
27− }
28− deriving (Generic)
29−
30−type RoutedApi = ToServantApi Routes
31−
32−-- routedApi = genericApi (Proxy :: Proxy Routes)
33−routedServer :: Server RoutedApi
34−routedServer = genericServer routes
35−
36−routes :: Routes AsServer
37−routes =
38− Routes
39− { getInt = pure 7,
40− captureIt = const (pure ())
41− }
42−
43−server :: Server Api
44−server = pure 7 :<|> const (pure ())