mirror of
https://github.com/github/semantic.git
synced 2024-12-30 10:27:45 +03:00
26 lines
990 B
Haskell
26 lines
990 B
Haskell
module SES.Myers.Spec where
|
|
|
|
import Data.These
|
|
import Prologue
|
|
import SES.Myers
|
|
import Test.Hspec
|
|
import Test.Hspec.LeanCheck
|
|
|
|
spec :: Spec
|
|
spec = do
|
|
describe "ses" $ do
|
|
prop "returns equal lists in These" $
|
|
\ as -> (ses (==) as as :: EditScript Char Char) `shouldBe` zipWith These as as
|
|
|
|
prop "returns deletions in This" $
|
|
\ as -> (ses (==) as [] :: EditScript Char Char) `shouldBe` fmap This as
|
|
|
|
prop "returns insertions in That" $
|
|
\ bs -> (ses (==) [] bs :: EditScript Char Char) `shouldBe` fmap That bs
|
|
|
|
prop "returns all elements individually for disjoint inputs" $
|
|
\ as bs -> length (ses (==) ((,) 0 <$> as :: [(Int, Char)]) ((,) 1 <$> bs :: [(Int, Char)])) `shouldBe` length as + length bs
|
|
|
|
prop "is lossless w.r.t. both input elements & ordering" $
|
|
\ as bs -> foldr (\ each (as, bs) -> these (flip (,) bs. (:as)) ((,) as . (:bs)) (\ a b -> (a:as, b:bs)) each) ([], []) (ses (==) as bs :: EditScript Char Char) `shouldBe` (as, bs)
|