mirror of
https://github.com/github/semantic.git
synced 2024-12-29 18:06:14 +03:00
45 lines
1.7 KiB
Haskell
45 lines
1.7 KiB
Haskell
{-# LANGUAGE DataKinds #-}
|
|
module DiffSpec where
|
|
|
|
import Data.Diff
|
|
import Data.Functor.Both
|
|
import Data.Functor.Foldable (cata)
|
|
import Data.Functor.Listable (ListableSyntax)
|
|
import Data.Record
|
|
import Data.Term
|
|
import Data.Union
|
|
import Interpreter
|
|
import RWS
|
|
import Test.Hspec
|
|
import Test.Hspec.LeanCheck
|
|
|
|
spec :: Spec
|
|
spec = parallel $ do
|
|
prop "equality is reflexive" $
|
|
\ diff -> diff `shouldBe` (diff :: Diff ListableSyntax (Record '[]) (Record '[]))
|
|
|
|
prop "equal terms produce identity diffs" $
|
|
\ term -> diffCost (diffTerms term (term :: Term ListableSyntax (Record '[]))) `shouldBe` 0
|
|
|
|
describe "beforeTerm" $ do
|
|
prop "recovers the before term" $
|
|
\ a b -> let diff = diffTerms a b :: Diff ListableSyntax (Record '[]) (Record '[]) in
|
|
beforeTerm diff `shouldBe` Just a
|
|
|
|
describe "afterTerm" $ do
|
|
prop "recovers the after term" $
|
|
\ a b -> let diff = diffTerms a b :: Diff ListableSyntax (Record '[]) (Record '[]) in
|
|
afterTerm diff `shouldBe` Just b
|
|
|
|
prop "forward permutations are changes" $ pendingWith "https://github.com/github/semantic-diff/issues/1359"
|
|
-- \ a -> let wrap = termIn Nil . inj
|
|
-- b = wrap [a]
|
|
-- c = wrap [a, b] in
|
|
-- diffTerms (wrap [a, b, c]) (wrap [c, a, b :: Term ListableSyntax (Record '[])]) `shouldBe` merge (Nil, Nil) (inj [ inserting c, merging a, merging b, deleting c ])
|
|
|
|
prop "backward permutations are changes" $
|
|
\ a -> let wrap = termIn Nil . inj
|
|
b = wrap [a]
|
|
c = wrap [a, b] in
|
|
diffTerms (wrap [a, b, c]) (wrap [b, c, a :: Term ListableSyntax (Record '[])]) `shouldBe` merge (Nil, Nil) (inj [ deleting a, merging b, merging c, inserting a ])
|