Safe Haskell	Safe-Inferred
Language	Haskell2010

Test.Hspec.Wai.QuickCheck

Contents

Re-exports
Internals

Synopsis

property :: Testable a => a -> (State a, Application) -> Property
(==>) :: Testable prop => Bool -> prop -> WaiProperty (State prop)
class Arbitrary a where
- arbitrary :: Gen a
- shrink :: a -> [a]
module Test.QuickCheck.Gen
class Testable a where
- type State a
- toProperty :: a -> WaiProperty (State a)
data WaiProperty st = WaiProperty {
- unWaiProperty :: (st, Application) -> Property
}

Documentation

property :: Testable a => a -> (State a, Application) -> Property Source #

(==>) :: Testable prop => Bool -> prop -> WaiProperty (State prop) infixr 0 Source #

Re-exports

class Arbitrary a where Source #

Random generation and shrinking of values.

QuickCheck provides Arbitrary instances for most types in base, except those which incur extra dependencies. For a wider range of Arbitrary instances see the quickcheck-instances package.

Minimal complete definition

arbitrary

Methods

arbitrary :: Gen a Source #

A generator for values of the given type.

It is worth spending time thinking about what sort of test data you want - good generators are often the difference between finding bugs and not finding them. You can use sample, label and classify to check the quality of your test data.

There is no generic arbitrary implementation included because we don't know how to make a high-quality one. If you want one, consider using the testing-feat or generic-random packages.

The QuickCheck manual goes into detail on how to write good generators. Make sure to look at it, especially if your type is recursive!

shrink :: a -> [a] Source #

Produces a (possibly) empty list of all the possible immediate shrinks of the given value.

The default implementation returns the empty list, so will not try to shrink the value. If your data type has no special invariants, you can enable shrinking by defining shrink = genericShrink, but by customising the behaviour of shrink you can often get simpler counterexamples.

Most implementations of shrink should try at least three things:

Shrink a term to any of its immediate subterms. You can use subterms to do this.
Recursively apply shrink to all immediate subterms. You can use recursivelyShrink to do this.
Type-specific shrinkings such as replacing a constructor by a simpler constructor.

For example, suppose we have the following implementation of binary trees:

data Tree a = Nil | Branch a (Tree a) (Tree a)

We can then define shrink as follows:

shrink Nil = []
shrink (Branch x l r) =
  -- shrink Branch to Nil
  [Nil] ++
  -- shrink to subterms
  [l, r] ++
  -- recursively shrink subterms
  [Branch x' l' r' | (x', l', r') <- shrink (x, l, r)]

There are a couple of subtleties here:

QuickCheck tries the shrinking candidates in the order they appear in the list, so we put more aggressive shrinking steps (such as replacing the whole tree by Nil) before smaller ones (such as recursively shrinking the subtrees).
It is tempting to write the last line as [Branch x' l' r' | x' <- shrink x, l' <- shrink l, r' <- shrink r] but this is the wrong thing! It will force QuickCheck to shrink x, l and r in tandem, and shrinking will stop once one of the three is fully shrunk.

There is a fair bit of boilerplate in the code above. We can avoid it with the help of some generic functions. The function genericShrink tries shrinking a term to all of its subterms and, failing that, recursively shrinks the subterms. Using it, we can define shrink as:

shrink x = shrinkToNil x ++ genericShrink x
  where
    shrinkToNil Nil = []
    shrinkToNil (Branch _ l r) = [Nil]

genericShrink is a combination of subterms, which shrinks a term to any of its subterms, and recursivelyShrink, which shrinks all subterms of a term. These may be useful if you need a bit more control over shrinking than genericShrink gives you.

A final gotcha: we cannot define shrink as simply shrink x = Nil:genericShrink x as this shrinks Nil to Nil, and shrinking will go into an infinite loop.

If all this leaves you bewildered, you might try shrink = genericShrink to begin with, after deriving Generic for your type. However, if your data type has any special invariants, you will need to check that genericShrink can't break those invariants.

Instances

Instances details

Arbitrary ASCIIString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen ASCIIString Source # shrink :: ASCIIString -> [ASCIIString] Source #
Arbitrary PrintableString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen PrintableString Source # shrink :: PrintableString -> [PrintableString] Source #
Arbitrary UnicodeString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen UnicodeString Source # shrink :: UnicodeString -> [UnicodeString] Source #
Arbitrary QCGen
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen QCGen Source # shrink :: QCGen -> [QCGen] Source #
Arbitrary All
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen All Source # shrink :: All -> [All] Source #
Arbitrary Any
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Any Source # shrink :: Any -> [Any] Source #
Arbitrary Version	Generates `Version` with non-empty non-negative `versionBranch`, and empty `versionTags`
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Version Source # shrink :: Version -> [Version] Source #
Arbitrary CChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CChar Source # shrink :: CChar -> [CChar] Source #
Arbitrary CClock
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CClock Source # shrink :: CClock -> [CClock] Source #
Arbitrary CDouble
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CDouble Source # shrink :: CDouble -> [CDouble] Source #
Arbitrary CFloat
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CFloat Source # shrink :: CFloat -> [CFloat] Source #
Arbitrary CInt
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CInt Source # shrink :: CInt -> [CInt] Source #
Arbitrary CIntMax
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CIntMax Source # shrink :: CIntMax -> [CIntMax] Source #
Arbitrary CIntPtr
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CIntPtr Source # shrink :: CIntPtr -> [CIntPtr] Source #
Arbitrary CLLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CLLong Source # shrink :: CLLong -> [CLLong] Source #
Arbitrary CLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CLong Source # shrink :: CLong -> [CLong] Source #
Arbitrary CPtrdiff
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CPtrdiff Source # shrink :: CPtrdiff -> [CPtrdiff] Source #
Arbitrary CSChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSChar Source # shrink :: CSChar -> [CSChar] Source #
Arbitrary CSUSeconds
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSUSeconds Source # shrink :: CSUSeconds -> [CSUSeconds] Source #
Arbitrary CShort
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CShort Source # shrink :: CShort -> [CShort] Source #
Arbitrary CSigAtomic
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSigAtomic Source # shrink :: CSigAtomic -> [CSigAtomic] Source #
Arbitrary CSize
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSize Source # shrink :: CSize -> [CSize] Source #
Arbitrary CTime
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CTime Source # shrink :: CTime -> [CTime] Source #
Arbitrary CUChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUChar Source # shrink :: CUChar -> [CUChar] Source #
Arbitrary CUInt
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUInt Source # shrink :: CUInt -> [CUInt] Source #
Arbitrary CUIntMax
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUIntMax Source # shrink :: CUIntMax -> [CUIntMax] Source #
Arbitrary CUIntPtr
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUIntPtr Source # shrink :: CUIntPtr -> [CUIntPtr] Source #
Arbitrary CULLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CULLong Source # shrink :: CULLong -> [CULLong] Source #
Arbitrary CULong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CULong Source # shrink :: CULong -> [CULong] Source #
Arbitrary CUSeconds
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUSeconds Source # shrink :: CUSeconds -> [CUSeconds] Source #
Arbitrary CUShort
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUShort Source # shrink :: CUShort -> [CUShort] Source #
Arbitrary CWchar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CWchar Source # shrink :: CWchar -> [CWchar] Source #
Arbitrary ExitCode
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen ExitCode Source # shrink :: ExitCode -> [ExitCode] Source #
Arbitrary Newline
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Newline Source # shrink :: Newline -> [Newline] Source #
Arbitrary NewlineMode
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen NewlineMode Source # shrink :: NewlineMode -> [NewlineMode] Source #
Arbitrary Int16
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int16 Source # shrink :: Int16 -> [Int16] Source #
Arbitrary Int32
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int32 Source # shrink :: Int32 -> [Int32] Source #
Arbitrary Int64
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int64 Source # shrink :: Int64 -> [Int64] Source #
Arbitrary Int8
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int8 Source # shrink :: Int8 -> [Int8] Source #
Arbitrary Word16
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word16 Source # shrink :: Word16 -> [Word16] Source #
Arbitrary Word32
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word32 Source # shrink :: Word32 -> [Word32] Source #
Arbitrary Word64
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word64 Source # shrink :: Word64 -> [Word64] Source #
Arbitrary Word8
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word8 Source # shrink :: Word8 -> [Word8] Source #
Arbitrary IntSet
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen IntSet Source # shrink :: IntSet -> [IntSet] Source #
Arbitrary Ordering
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Ordering Source # shrink :: Ordering -> [Ordering] Source #
Arbitrary Integer
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Integer Source # shrink :: Integer -> [Integer] Source #
Arbitrary ()
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen () Source # shrink :: () -> [()] Source #
Arbitrary Bool
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Bool Source # shrink :: Bool -> [Bool] Source #
Arbitrary Char
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Char Source # shrink :: Char -> [Char] Source #
Arbitrary Double
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Double Source # shrink :: Double -> [Double] Source #
Arbitrary Float
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Float Source # shrink :: Float -> [Float] Source #
Arbitrary Int
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int Source # shrink :: Int -> [Int] Source #
Arbitrary Word
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word Source # shrink :: Word -> [Word] Source #
Arbitrary a => Arbitrary (Blind a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Blind a) Source # shrink :: Blind a -> [Blind a] Source #
Arbitrary a => Arbitrary (Fixed a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Fixed a) Source # shrink :: Fixed a -> [Fixed a] Source #
Arbitrary a => Arbitrary (InfiniteList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (InfiniteList a) Source # shrink :: InfiniteList a -> [InfiniteList a] Source #
Arbitrary a => Arbitrary (InfiniteListInternalData a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (InfiniteListInternalData a) Source # shrink :: InfiniteListInternalData a -> [InfiniteListInternalData a] Source #
(Integral a, Bounded a) => Arbitrary (Large a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Large a) Source # shrink :: Large a -> [Large a] Source #
(Num a, Ord a, Arbitrary a) => Arbitrary (Negative a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Negative a) Source # shrink :: Negative a -> [Negative a] Source #
Arbitrary a => Arbitrary (NonEmptyList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonEmptyList a) Source # shrink :: NonEmptyList a -> [NonEmptyList a] Source #
(Num a, Ord a, Arbitrary a) => Arbitrary (NonNegative a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonNegative a) Source # shrink :: NonNegative a -> [NonNegative a] Source #
(Num a, Ord a, Arbitrary a) => Arbitrary (NonPositive a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonPositive a) Source # shrink :: NonPositive a -> [NonPositive a] Source #
(Num a, Eq a, Arbitrary a) => Arbitrary (NonZero a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonZero a) Source # shrink :: NonZero a -> [NonZero a] Source #
(Ord a, Arbitrary a) => Arbitrary (OrderedList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (OrderedList a) Source # shrink :: OrderedList a -> [OrderedList a] Source #
(Num a, Ord a, Arbitrary a) => Arbitrary (Positive a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Positive a) Source # shrink :: Positive a -> [Positive a] Source #
Arbitrary a => Arbitrary (Shrink2 a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrink2 a) Source # shrink :: Shrink2 a -> [Shrink2 a] Source #
Integral a => Arbitrary (Small a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Small a) Source # shrink :: Small a -> [Small a] Source #
Arbitrary a => Arbitrary (Smart a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Smart a) Source # shrink :: Smart a -> [Smart a] Source #
(Arbitrary a, Ord a) => Arbitrary (SortedList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (SortedList a) Source # shrink :: SortedList a -> [SortedList a] Source #
Arbitrary a => Arbitrary (ZipList a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (ZipList a) Source # shrink :: ZipList a -> [ZipList a] Source #
Arbitrary a => Arbitrary (Complex a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Complex a) Source # shrink :: Complex a -> [Complex a] Source #
Arbitrary a => Arbitrary (Identity a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Identity a) Source # shrink :: Identity a -> [Identity a] Source #
Arbitrary a => Arbitrary (First a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (First a) Source # shrink :: First a -> [First a] Source #
Arbitrary a => Arbitrary (Last a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Last a) Source # shrink :: Last a -> [Last a] Source #
Arbitrary a => Arbitrary (Dual a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Dual a) Source # shrink :: Dual a -> [Dual a] Source #
(Arbitrary a, CoArbitrary a) => Arbitrary (Endo a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Endo a) Source # shrink :: Endo a -> [Endo a] Source #
Arbitrary a => Arbitrary (Product a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Product a) Source # shrink :: Product a -> [Product a] Source #
Arbitrary a => Arbitrary (Sum a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Sum a) Source # shrink :: Sum a -> [Sum a] Source #
Integral a => Arbitrary (Ratio a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Ratio a) Source # shrink :: Ratio a -> [Ratio a] Source #
Arbitrary a => Arbitrary (IntMap a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (IntMap a) Source # shrink :: IntMap a -> [IntMap a] Source #
Arbitrary a => Arbitrary (Seq a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Seq a) Source # shrink :: Seq a -> [Seq a] Source #
(Ord a, Arbitrary a) => Arbitrary (Set a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Set a) Source # shrink :: Set a -> [Set a] Source #
Arbitrary a => Arbitrary (Tree a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Tree a) Source # shrink :: Tree a -> [Tree a] Source #
Arbitrary a => Arbitrary (Maybe a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Maybe a) Source # shrink :: Maybe a -> [Maybe a] Source #
Arbitrary a => Arbitrary [a]
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen [a] Source # shrink :: [a] -> [[a]] Source #
(Function a, CoArbitrary a, Arbitrary b) => Arbitrary (a :-> b)
Instance details Defined in Test.QuickCheck.Function Methods arbitrary :: Gen (a :-> b) Source # shrink :: (a :-> b) -> [a :-> b] Source #
(Function a, CoArbitrary a, Arbitrary b) => Arbitrary (Fun a b)
Instance details Defined in Test.QuickCheck.Function Methods arbitrary :: Gen (Fun a b) Source # shrink :: Fun a b -> [Fun a b] Source #
(Arbitrary a, ShrinkState s a) => Arbitrary (Shrinking s a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrinking s a) Source # shrink :: Shrinking s a -> [Shrinking s a] Source #
Arbitrary (m a) => Arbitrary (WrappedMonad m a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (WrappedMonad m a) Source # shrink :: WrappedMonad m a -> [WrappedMonad m a] Source #
(Arbitrary a, Arbitrary b) => Arbitrary (Either a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Either a b) Source # shrink :: Either a b -> [Either a b] Source #
HasResolution a => Arbitrary (Fixed a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Fixed a) Source # shrink :: Fixed a -> [Fixed a] Source #
(Ord k, Arbitrary k, Arbitrary v) => Arbitrary (Map k v)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Map k v) Source # shrink :: Map k v -> [Map k v] Source #
(Arbitrary a, Arbitrary b) => Arbitrary (a, b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b) Source # shrink :: (a, b) -> [(a, b)] Source #
(CoArbitrary a, Arbitrary b) => Arbitrary (a -> b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a -> b) Source # shrink :: (a -> b) -> [a -> b] Source #
Arbitrary (a b c) => Arbitrary (WrappedArrow a b c)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (WrappedArrow a b c) Source # shrink :: WrappedArrow a b c -> [WrappedArrow a b c] Source #
Arbitrary a => Arbitrary (Const a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Const a b) Source # shrink :: Const a b -> [Const a b] Source #
Arbitrary (f a) => Arbitrary (Alt f a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Alt f a) Source # shrink :: Alt f a -> [Alt f a] Source #
Arbitrary a => Arbitrary (Constant a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Constant a b) Source # shrink :: Constant a b -> [Constant a b] Source #
(Arbitrary a, Arbitrary b, Arbitrary c) => Arbitrary (a, b, c)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c) Source # shrink :: (a, b, c) -> [(a, b, c)] Source #
(Arbitrary1 f, Arbitrary1 g, Arbitrary a) => Arbitrary (Product f g a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Product f g a) Source # shrink :: Product f g a -> [Product f g a] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d) => Arbitrary (a, b, c, d)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d) Source # shrink :: (a, b, c, d) -> [(a, b, c, d)] Source #
(Arbitrary1 f, Arbitrary1 g, Arbitrary a) => Arbitrary (Compose f g a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Compose f g a) Source # shrink :: Compose f g a -> [Compose f g a] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e) => Arbitrary (a, b, c, d, e)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e) Source # shrink :: (a, b, c, d, e) -> [(a, b, c, d, e)] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e, Arbitrary f) => Arbitrary (a, b, c, d, e, f)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e, f) Source # shrink :: (a, b, c, d, e, f) -> [(a, b, c, d, e, f)] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e, Arbitrary f, Arbitrary g) => Arbitrary (a, b, c, d, e, f, g)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e, f, g) Source # shrink :: (a, b, c, d, e, f, g) -> [(a, b, c, d, e, f, g)] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e, Arbitrary f, Arbitrary g, Arbitrary h) => Arbitrary (a, b, c, d, e, f, g, h)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e, f, g, h) Source # shrink :: (a, b, c, d, e, f, g, h) -> [(a, b, c, d, e, f, g, h)] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e, Arbitrary f, Arbitrary g, Arbitrary h, Arbitrary i) => Arbitrary (a, b, c, d, e, f, g, h, i)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e, f, g, h, i) Source # shrink :: (a, b, c, d, e, f, g, h, i) -> [(a, b, c, d, e, f, g, h, i)] Source #
(Arbitrary a, Arbitrary b, Arbitrary c, Arbitrary d, Arbitrary e, Arbitrary f, Arbitrary g, Arbitrary h, Arbitrary i, Arbitrary j) => Arbitrary (a, b, c, d, e, f, g, h, i, j)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c, d, e, f, g, h, i, j) Source # shrink :: (a, b, c, d, e, f, g, h, i, j) -> [(a, b, c, d, e, f, g, h, i, j)] Source #

module Test.QuickCheck.Gen

Internals

class Testable a where Source #

Associated Types

type State a Source #

Methods

toProperty :: a -> WaiProperty (State a) Source #

Instances

Instances details

Testable (WaiExpectation st) Source #
Instance details Defined in Test.Hspec.Wai.QuickCheck Associated Types type State (WaiExpectation st) Source # Methods toProperty :: WaiExpectation st -> WaiProperty (State (WaiExpectation st)) Source #
Testable (WaiProperty st) Source #
Instance details Defined in Test.Hspec.Wai.QuickCheck Associated Types type State (WaiProperty st) Source # Methods toProperty :: WaiProperty st -> WaiProperty (State (WaiProperty st)) Source #
(Arbitrary a, Show a, Testable prop) => Testable (a -> prop) Source #
Instance details Defined in Test.Hspec.Wai.QuickCheck Associated Types type State (a -> prop) Source # Methods toProperty :: (a -> prop) -> WaiProperty (State (a -> prop)) Source #

data WaiProperty st Source #

Constructors

WaiProperty
Fields unWaiProperty :: (st, Application) -> Property

Instances

Instances details

Testable (WaiProperty st) Source #
Instance details Defined in Test.Hspec.Wai.QuickCheck Associated Types type State (WaiProperty st) Source # Methods toProperty :: WaiProperty st -> WaiProperty (State (WaiProperty st)) Source #
type State (WaiProperty st) Source #
Instance details Defined in Test.Hspec.Wai.QuickCheck type State (WaiProperty st) = st