Hedgehog state machine - #48
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While using state machine testing from hedgehog, it's useful to build up a session in a `PropertyT WaiSession` and then run the session at the end. In order to do that access to `runWaiSession` is needed. It can currently be accessed by importing the `Internal` module, but I think making it more prominent is useful.
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These were the changes I needed to make in order to use
hspec-wai's testing combinators with hedgehog state machine testing. The important changes are:MonadCatchandMonadThrowinstances forWaiSession, as these are required byexecuteSequentialin hedgehog and already implemented forSession.runWaiSessionfromTest.Hspec.Waiso theWaiSessionmay be run once the test actions have been built.I'm aware that
runWaiSessioncan be imported fromTest.Hspec.Wai.Internal, but given its importance I thought it made sense to make it part of the public API.