hspec- Behavior Driven Development for Haskell

Safe HaskellNone



Importing this module allows you to use an HUnit Test as an example for a behavior. You can use an explicit TestCase data constructor or use an Assertion. For an Assertion, any exception means the example failed; otherwise, it's successfull.

NOTE: Any output from the example to stdout is ignored. If you need to write out for debugging, you can write to stderr or a file handle.

 import Test.Hspec.Monadic
 import Test.Hspec.HUnit ()
 import Test.HUnit

 main :: IO ()
 main = hspec $ do
   describe "reverse" $ do
     it "reverses a list" $ do
       reverse [1, 2, 3] @?= [3, 2, 1]

     it "gives the original list, if applied twice" $ TestCase $
       (reverse . reverse) [1, 2, 3] @?= [1, 2, 3]