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Test that afterTerm recovers the second term.

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This commit is contained in:
Rob Rix 2016-06-27 13:24:50 -04:00
parent 8035c1844c
commit aa5d6e4deb
1 changed files with 5 additions and 0 deletions
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5
test/Diff/Spec.hs
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@ -29,6 +29,11 @@ spec = parallel $ do
\ a b -> let diff = diffTerms (free . Free) (==) diffCost (toTerm a) (toTerm (b :: ArbitraryTerm Text (Record '[Category]))) in
beforeTerm diff `shouldBe` Just (toTerm a)
describe "afterTerm" $ do
prop "recovers the after term" $
\ a b -> let diff = diffTerms (free . Free) (==) diffCost (toTerm a) (toTerm (b :: ArbitraryTerm Text (Record '[Category]))) in
afterTerm diff `shouldBe` Just (toTerm b)
describe "ArbitraryDiff" $ do
prop "generates diffs of a specific size" . forAll ((arbitrary >>= \ n -> (,) n <$> diffOfSize n) `suchThat` ((> 0) . fst)) $
\ (n, diff) -> arbitraryDiffSize (diff :: ArbitraryDiff Text ()) `shouldBe` n