Haxl/tests/ProfileTests.hs
Andrew Farmer 528bba5565 Add unit test to demonstrate withLabel with pure/haxl exceptions
Summary:
Labels which throw Haxl exceptions are recorded, but pure exceptions bubble up
and labels are lost. This test demonstrates this.

Reviewed By: simonmar

Differential Revision: D3672479

fbshipit-source-id: fab10878e7eb067e0c65bcf401d75604c333007f
2016-08-22 08:31:36 -07:00

69 lines
2.0 KiB
Haskell

{-# LANGUAGE NoImplicitPrelude #-}
{-# LANGUAGE OverloadedStrings #-}
module ProfileTests where
import Haxl.Prelude
import Data.List
import Haxl.Core
import Haxl.Core.Monad
import Test.HUnit
import Control.DeepSeq (force)
import Control.Exception (evaluate)
import Data.IORef
import qualified Data.HashMap.Strict as HashMap
import qualified Data.HashSet as HashSet
import TestUtils
mkProfilingEnv = do
env <- makeTestEnv
return env { flags = (flags env) { report = 4 } }
collectsdata :: Assertion
collectsdata = do
env <- mkProfilingEnv
_x <- runHaxl env $
withLabel "bar" $
withLabel "foo" $
if length (intersect ["a"::Text, "b"] ["c"]) > 1
then return 5
else return (4::Int)
profData <- profile <$> readIORef (profRef env)
assertEqual "has data" 3 $ HashMap.size profData
assertBool "foo allocates" $
case profileAllocs <$> HashMap.lookup "foo" profData of
Just x -> x > 0
Nothing -> False
assertEqual "bar does not allocate" (Just 0) $
profileAllocs <$> HashMap.lookup "bar" profData
assertEqual "foo's parent" (Just ["bar"]) $
HashSet.toList . profileDeps <$> HashMap.lookup "foo" profData
exceptions :: Assertion
exceptions = do
env <- mkProfilingEnv
_x <- runHaxl env $
withLabel "outer" $
tryToHaxlException $ withLabel "inner" $
unsafeLiftIO $ evaluate $ force (error "pure exception" :: Int)
profData <- profile <$> readIORef (profRef env)
assertBool "inner label not added" $
not $ HashMap.member "inner" profData
env2 <- mkProfilingEnv
_x <- runHaxl env2 $
withLabel "outer" $
tryToHaxlException $ withLabel "inner" $
throw $ NotFound "haxl exception"
profData <- profile <$> readIORef (profRef env2)
assertBool "inner label added" $
HashMap.member "inner" profData
tests = TestList
[ TestLabel "collectsdata" $ TestCase collectsdata
, TestLabel "exceptions" $ TestCase exceptions
]