úÎz •     NoneA Selector> is a predicate; it can simultaneously constrain the type and  value of an exception. This is just an alias for HUnit's . actual `shouldBe` expected sets the expectation that actual is equal  to expected (this is just an alias for ). v ` shouldSatisfy` p sets the expectation that p v is True. list ` shouldContain` sublist sets the expectation that sublist is contained, , wholly and intact, anywhere in the second. action ` shouldReturn` expected sets the expectation that action  returns expected. action ` shouldThrow` selector sets the expectation that action throws J an exception. The precise nature of the expected exception is described  with a .     None         hspec-expectations-0.3.3Test.Hspec.ExpectationsTest.Hspec.Expectations.ContribSelector ExpectationexpectationFailureshouldBe shouldSatisfy shouldContain shouldReturn shouldThrow anyException anyErrorCall errorCallanyIOExceptionanyArithExceptionisLeftisRight HUnit-1.2.5.2Test.HUnit.Lang assertFailureTest.HUnit.Base@?=