18 lines
560 B
Haskell
18 lines
560 B
Haskell
module MonadSpec where
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import Test.Hspec
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import TestUtils
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import Control.Monad.Error.Class
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spec :: Spec
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spec = do
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describe "When using GhcModT in a do block" $
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it "a pattern match failure causes a call to `fail` on ErrorT in the monad stack" $ do
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(a, _h)
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<- runGhcModT defaultOptions $
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do
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Just _ <- return Nothing
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return "hello"
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`catchError` (const $ fail "oh noes")
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a `shouldBe` (Left $ GMEString "oh noes")
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