QuickCheck-1.1.0.0: Automatic testing of Haskell programsContentsIndex
Test.QuickCheck.Batch
Portabilitynon-portable (uses Control.Exception, Control.Concurrent)
Stabilityexperimental
Maintainerlibraries@haskell.org
Description

A batch driver for running QuickCheck.

Note: in GHC only, it is possible to place a time limit on each test, to ensure that testing terminates.

Synopsis
run :: Testable a => a -> TestOptions -> IO TestResult
runTests :: String -> TestOptions -> [TestOptions -> IO TestResult] -> IO ()
defOpt :: TestOptions
data TestOptions = TestOptions {
no_of_tests :: Int
length_of_tests :: Int
debug_tests :: Bool
}
data TestResult
= TestOk String Int [[String]]
| TestExausted String Int [[String]]
| TestFailed [String] Int
| TestAborted Exception
isBottom :: a -> Bool
bottom :: a
Documentation
run :: Testable a => a -> TestOptions -> IO TestResult
Run the test. Here we use the same random number each time, so we get reproducable results!
runTests :: String -> TestOptions -> [TestOptions -> IO TestResult] -> IO ()
Prints a one line summary of various tests with common theme
defOpt :: TestOptions
data TestOptions
Constructors
TestOptions
no_of_tests :: Intnumber of tests to run.
length_of_tests :: Inttime limit for test, in seconds. If zero, no time limit. Note: only GHC supports time limits.
debug_tests :: Bool
data TestResult
Constructors
TestOk String Int [[String]]
TestExausted String Int [[String]]
TestFailed [String] Int
TestAborted Exception
isBottom :: a -> Bool

Look out behind you! These can be misused badly. However, in the context of a batch tester, can also be very useful.

Examples of use of bottom and isBottom: 

	{- test for abort -}
	prop_head2 = isBottom (head [])
	{- test for strictness -}
	prop_head3 = isBottom (head bottom)
bottom :: a
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