Safe Haskell	None
Language	Haskell2010

Test.Tasty.Golden.Advanced

Contents

Synopsis

goldenTest :: TestName -> IO a -> IO a -> (a -> a -> IO (Maybe String)) -> (a -> IO ()) -> TestTree

The main function

Arguments

:: TestName	test name
-> IO a	get the golden correct value Note that this action may be followed by the update function call. Therefore, this action should avoid reading the file lazily; otherwise, the file may remain half-open and the update action will fail.
-> IO a	get the tested value
-> (a -> a -> IO (Maybe String))	comparison function. If two values are the same, it should return `Nothing`. If they are different, it should return an error that will be printed to the user. First argument is the golden value. The function may use `IO`, for example, to launch an external `diff` command.
-> (a -> IO ())	update the golden file
-> TestTree

A very general testing function.