Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.BCP47.Internal.Arbitrary

Synopsis

class Arbitrary a
arbitrary :: Arbitrary a => Gen a
alphaString :: Int -> Gen String
alphaNumString :: Int -> Gen String
alphaChar :: Gen Char
numChar :: Gen Char
elements :: HasCallStack => [a] -> Gen a
choose :: Random a => (a, a) -> Gen a
oneof :: HasCallStack => [Gen a] -> Gen a
suchThat :: Gen a -> (a -> Bool) -> Gen a
listOf :: Gen a -> Gen [a]
vectorOf :: Int -> Gen a -> Gen [a]

Documentation

class Arbitrary a #

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

Instances

Instances details

Arbitrary ASCIIString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen ASCIIString # shrink :: ASCIIString -> [ASCIIString] #
Arbitrary PrintableString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen PrintableString # shrink :: PrintableString -> [PrintableString] #
Arbitrary UnicodeString
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen UnicodeString # shrink :: UnicodeString -> [UnicodeString] #
Arbitrary A
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen A # shrink :: A -> [A] #
Arbitrary B
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen B # shrink :: B -> [B] #
Arbitrary C
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen C # shrink :: C -> [C] #
Arbitrary OrdA
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen OrdA # shrink :: OrdA -> [OrdA] #
Arbitrary OrdB
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen OrdB # shrink :: OrdB -> [OrdB] #
Arbitrary OrdC
Instance details Defined in Test.QuickCheck.Poly Methods arbitrary :: Gen OrdC # shrink :: OrdC -> [OrdC] #
Arbitrary QCGen
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen QCGen # shrink :: QCGen -> [QCGen] #
Arbitrary Value	Since: aeson-2.0.3.0
Instance details Defined in Data.Aeson.Types.Internal Methods arbitrary :: Gen Value # shrink :: Value -> [Value] #
Arbitrary All
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen All # shrink :: All -> [All] #
Arbitrary Any
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Any # shrink :: Any -> [Any] #
Arbitrary Version	Generates `Version` with non-empty non-negative `versionBranch`, and empty `versionTags`
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Version # shrink :: Version -> [Version] #
Arbitrary CChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CChar # shrink :: CChar -> [CChar] #
Arbitrary CClock
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CClock # shrink :: CClock -> [CClock] #
Arbitrary CDouble
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CDouble # shrink :: CDouble -> [CDouble] #
Arbitrary CFloat
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CFloat # shrink :: CFloat -> [CFloat] #
Arbitrary CInt
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CInt # shrink :: CInt -> [CInt] #
Arbitrary CIntMax
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CIntMax # shrink :: CIntMax -> [CIntMax] #
Arbitrary CIntPtr
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CIntPtr # shrink :: CIntPtr -> [CIntPtr] #
Arbitrary CLLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CLLong # shrink :: CLLong -> [CLLong] #
Arbitrary CLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CLong # shrink :: CLong -> [CLong] #
Arbitrary CPtrdiff
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CPtrdiff # shrink :: CPtrdiff -> [CPtrdiff] #
Arbitrary CSChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSChar # shrink :: CSChar -> [CSChar] #
Arbitrary CSUSeconds
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSUSeconds # shrink :: CSUSeconds -> [CSUSeconds] #
Arbitrary CShort
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CShort # shrink :: CShort -> [CShort] #
Arbitrary CSigAtomic
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSigAtomic # shrink :: CSigAtomic -> [CSigAtomic] #
Arbitrary CSize
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CSize # shrink :: CSize -> [CSize] #
Arbitrary CTime
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CTime # shrink :: CTime -> [CTime] #
Arbitrary CUChar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUChar # shrink :: CUChar -> [CUChar] #
Arbitrary CUInt
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUInt # shrink :: CUInt -> [CUInt] #
Arbitrary CUIntMax
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUIntMax # shrink :: CUIntMax -> [CUIntMax] #
Arbitrary CUIntPtr
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUIntPtr # shrink :: CUIntPtr -> [CUIntPtr] #
Arbitrary CULLong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CULLong # shrink :: CULLong -> [CULLong] #
Arbitrary CULong
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CULong # shrink :: CULong -> [CULong] #
Arbitrary CUSeconds
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUSeconds # shrink :: CUSeconds -> [CUSeconds] #
Arbitrary CUShort
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CUShort # shrink :: CUShort -> [CUShort] #
Arbitrary CWchar
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen CWchar # shrink :: CWchar -> [CWchar] #
Arbitrary ExitCode
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen ExitCode # shrink :: ExitCode -> [ExitCode] #
Arbitrary Newline
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Newline # shrink :: Newline -> [Newline] #
Arbitrary NewlineMode
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen NewlineMode # shrink :: NewlineMode -> [NewlineMode] #
Arbitrary Int16
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int16 # shrink :: Int16 -> [Int16] #
Arbitrary Int32
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int32 # shrink :: Int32 -> [Int32] #
Arbitrary Int64
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int64 # shrink :: Int64 -> [Int64] #
Arbitrary Int8
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int8 # shrink :: Int8 -> [Int8] #
Arbitrary Word16
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word16 # shrink :: Word16 -> [Word16] #
Arbitrary Word32
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word32 # shrink :: Word32 -> [Word32] #
Arbitrary Word64
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word64 # shrink :: Word64 -> [Word64] #
Arbitrary Word8
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word8 # shrink :: Word8 -> [Word8] #
Arbitrary BCP47 Source #
Instance details Defined in Data.BCP47 Methods arbitrary :: Gen BCP47 # shrink :: BCP47 -> [BCP47] #
Arbitrary Extension Source #
Instance details Defined in Data.BCP47.Internal.Extension Methods arbitrary :: Gen Extension # shrink :: Extension -> [Extension] #
Arbitrary LanguageExtension Source #
Instance details Defined in Data.BCP47.Internal.LanguageExtension Methods arbitrary :: Gen LanguageExtension # shrink :: LanguageExtension -> [LanguageExtension] #
Arbitrary PrivateUse Source #
Instance details Defined in Data.BCP47.Internal.PrivateUse Methods arbitrary :: Gen PrivateUse # shrink :: PrivateUse -> [PrivateUse] #
Arbitrary Script Source #
Instance details Defined in Data.BCP47.Internal.Script Methods arbitrary :: Gen Script # shrink :: Script -> [Script] #
Arbitrary Subtags Source #
Instance details Defined in Data.BCP47.Internal.Subtags Methods arbitrary :: Gen Subtags # shrink :: Subtags -> [Subtags] #
Arbitrary Variant Source #
Instance details Defined in Data.BCP47.Internal.Variant Methods arbitrary :: Gen Variant # shrink :: Variant -> [Variant] #
Arbitrary IntSet	WARNING: The same warning as for `Arbitrary (Set a)` applies here.
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen IntSet # shrink :: IntSet -> [IntSet] #
Arbitrary Ordering
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Ordering # shrink :: Ordering -> [Ordering] #
Arbitrary Integer
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Integer # shrink :: Integer -> [Integer] #
Arbitrary ()
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen () # shrink :: () -> [()] #
Arbitrary Bool
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Bool # shrink :: Bool -> [Bool] #
Arbitrary Char
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Char # shrink :: Char -> [Char] #
Arbitrary Double
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Double # shrink :: Double -> [Double] #
Arbitrary Float
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Float # shrink :: Float -> [Float] #
Arbitrary Int
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Int # shrink :: Int -> [Int] #
Arbitrary Word
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen Word # shrink :: Word -> [Word] #
Arbitrary a => Arbitrary (Blind a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Blind a) # shrink :: Blind a -> [Blind a] #
Arbitrary a => Arbitrary (Fixed a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Fixed a) # shrink :: Fixed a -> [Fixed a] #
Arbitrary a => Arbitrary (InfiniteList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (InfiniteList a) # shrink :: InfiniteList a -> [InfiniteList a] #
Arbitrary a => Arbitrary (InfiniteListInternalData a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (InfiniteListInternalData a) # shrink :: InfiniteListInternalData a -> [InfiniteListInternalData a] #
(Integral a, Bounded a) => Arbitrary (Large a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Large a) # shrink :: Large a -> [Large a] #
(Num a, Ord a, Arbitrary a) => Arbitrary (Negative a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Negative a) # shrink :: Negative a -> [Negative a] #
Arbitrary a => Arbitrary (NoShrink a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NoShrink a) # shrink :: NoShrink a -> [NoShrink a] #
Arbitrary a => Arbitrary (NonEmptyList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonEmptyList a) # shrink :: NonEmptyList a -> [NonEmptyList a] #
(Num a, Ord a, Arbitrary a) => Arbitrary (NonNegative a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonNegative a) # shrink :: NonNegative a -> [NonNegative a] #
(Num a, Ord a, Arbitrary a) => Arbitrary (NonPositive a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonPositive a) # shrink :: NonPositive a -> [NonPositive a] #
(Num a, Eq a, Arbitrary a) => Arbitrary (NonZero a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonZero a) # shrink :: NonZero a -> [NonZero a] #
(Ord a, Arbitrary a) => Arbitrary (OrderedList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (OrderedList a) # shrink :: OrderedList a -> [OrderedList a] #
(Num a, Ord a, Arbitrary a) => Arbitrary (Positive a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Positive a) # shrink :: Positive a -> [Positive a] #
Arbitrary a => Arbitrary (Shrink2 a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrink2 a) # shrink :: Shrink2 a -> [Shrink2 a] #
Integral a => Arbitrary (Small a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Small a) # shrink :: Small a -> [Small a] #
Arbitrary a => Arbitrary (Smart a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Smart a) # shrink :: Smart a -> [Smart a] #
(Arbitrary a, Ord a) => Arbitrary (SortedList a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (SortedList a) # shrink :: SortedList a -> [SortedList a] #
Arbitrary v => Arbitrary (KeyMap v)	Since: aeson-2.0.3.0
Instance details Defined in Data.Aeson.KeyMap Methods arbitrary :: Gen (KeyMap v) # shrink :: KeyMap v -> [KeyMap v] #
Arbitrary a => Arbitrary (ZipList a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (ZipList a) # shrink :: ZipList a -> [ZipList a] #
Arbitrary a => Arbitrary (Complex a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Complex a) # shrink :: Complex a -> [Complex a] #
Arbitrary a => Arbitrary (Identity a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Identity a) # shrink :: Identity a -> [Identity a] #
Arbitrary a => Arbitrary (First a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (First a) # shrink :: First a -> [First a] #
Arbitrary a => Arbitrary (Last a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Last a) # shrink :: Last a -> [Last a] #
Arbitrary a => Arbitrary (Dual a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Dual a) # shrink :: Dual a -> [Dual a] #
(Arbitrary a, CoArbitrary a) => Arbitrary (Endo a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Endo a) # shrink :: Endo a -> [Endo a] #
Arbitrary a => Arbitrary (Product a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Product a) # shrink :: Product a -> [Product a] #
Arbitrary a => Arbitrary (Sum a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Sum a) # shrink :: Sum a -> [Sum a] #
Integral a => Arbitrary (Ratio a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Ratio a) # shrink :: Ratio a -> [Ratio a] #
Arbitrary a => Arbitrary (Trie a) Source #
Instance details Defined in Data.BCP47.Trie.Internal Methods arbitrary :: Gen (Trie a) # shrink :: Trie a -> [Trie a] #
Arbitrary a => Arbitrary (IntMap a)	WARNING: The same warning as for `Arbitrary (Set a)` applies here.
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (IntMap a) # shrink :: IntMap a -> [IntMap a] #
Arbitrary a => Arbitrary (Seq a)	WARNING: The same warning as for `Arbitrary (Set a)` applies here.
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Seq a) # shrink :: Seq a -> [Seq a] #
(Ord a, Arbitrary a) => Arbitrary (Set a)	WARNING: Users working on the internals of the `Set` type via e.g. `Data.Set.Internal` should be aware that this instance aims to give a good representation of `Set a` as mathematical sets but does not aim to provide a varied distribution over the underlying representation.
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Set a) # shrink :: Set a -> [Set a] #
Arbitrary a => Arbitrary (Tree a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Tree a) # shrink :: Tree a -> [Tree a] #
(Generic a, GArbitrary a (Rep a) some, RecursivelyShrink (Rep a), GSubterms (Rep a) a) => Arbitrary (GenericArbitrary a)
Instance details Defined in Test.QuickCheck.Arbitrary.Generic Methods arbitrary :: Gen (GenericArbitrary a) # shrink :: GenericArbitrary a -> [GenericArbitrary a] #
Arbitrary a => Arbitrary (Maybe a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Maybe a) # shrink :: Maybe a -> [Maybe a] #
Arbitrary a => Arbitrary [a]
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen [a] # shrink :: [a] -> [[a]] #
(Function a, CoArbitrary a, Arbitrary b) => Arbitrary (a :-> b)
Instance details Defined in Test.QuickCheck.Function Methods arbitrary :: Gen (a :-> b) # shrink :: (a :-> b) -> [a :-> b] #
(Function a, CoArbitrary a, Arbitrary b) => Arbitrary (Fun a b)
Instance details Defined in Test.QuickCheck.Function Methods arbitrary :: Gen (Fun a b) # shrink :: Fun a b -> [Fun a b] #
(Arbitrary a, ShrinkState s a) => Arbitrary (Shrinking s a)
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrinking s a) # shrink :: Shrinking s a -> [Shrinking s a] #
Arbitrary (m a) => Arbitrary (WrappedMonad m a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (WrappedMonad m a) # shrink :: WrappedMonad m a -> [WrappedMonad m a] #
(Arbitrary a, Arbitrary b) => Arbitrary (Either a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Either a b) # shrink :: Either a b -> [Either a b] #
HasResolution a => Arbitrary (Fixed a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Fixed a) # shrink :: Fixed a -> [Fixed a] #
(Ord k, Arbitrary k, Arbitrary v) => Arbitrary (Map k v)	WARNING: The same warning as for `Arbitrary (Set a)` applies here.
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Map k v) # shrink :: Map k v -> [Map k v] #
(Arbitrary a, Arbitrary b) => Arbitrary (a, b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b) # shrink :: (a, b) -> [(a, b)] #
(CoArbitrary a, Arbitrary b) => Arbitrary (a -> b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a -> b) # shrink :: (a -> b) -> [a -> b] #
Arbitrary (a b c) => Arbitrary (WrappedArrow a b c)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (WrappedArrow a b c) # shrink :: WrappedArrow a b c -> [WrappedArrow a b c] #
Arbitrary a => Arbitrary (Const a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Const a b) # shrink :: Const a b -> [Const a b] #
Arbitrary (f a) => Arbitrary (Alt f a)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Alt f a) # shrink :: Alt f a -> [Alt f a] #
Arbitrary a => Arbitrary (Constant a b)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (Constant a b) # shrink :: Constant a b -> [Constant a b] #
(Arbitrary a, Arbitrary b, Arbitrary c) => Arbitrary (a, b, c)
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen (a, b, c) # shrink :: (a, b, c) -> [(a, b, c)] #
(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) # shrink :: Product f g a -> [Product f g a] #
(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) # shrink :: (a, b, c, d) -> [(a, b, c, d)] #
(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) # shrink :: Compose f g a -> [Compose f g a] #
(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) # shrink :: (a, b, c, d, e) -> [(a, b, c, d, e)] #
(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) # shrink :: (a, b, c, d, e, f) -> [(a, b, c, d, e, f)] #
(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) # shrink :: (a, b, c, d, e, f, g) -> [(a, b, c, d, e, f, g)] #
(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) # shrink :: (a, b, c, d, e, f, g, h) -> [(a, b, c, d, e, f, g, h)] #
(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) # shrink :: (a, b, c, d, e, f, g, h, i) -> [(a, b, c, d, e, f, g, h, i)] #
(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) # shrink :: (a, b, c, d, e, f, g, h, i, j) -> [(a, b, c, d, e, f, g, h, i, j)] #

arbitrary :: Arbitrary a => Gen a #

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!

alphaString :: Int -> Gen String Source #

alphaNumString :: Int -> Gen String Source #

alphaChar :: Gen Char Source #

numChar :: Gen Char Source #

elements :: HasCallStack => [a] -> Gen a #

Generates one of the given values. The input list must be non-empty.

choose :: Random a => (a, a) -> Gen a #

Generates a random element in the given inclusive range. For integral and enumerated types, the specialised variants of choose below run much quicker.

oneof :: HasCallStack => [Gen a] -> Gen a #

Randomly uses one of the given generators. The input list must be non-empty.

suchThat :: Gen a -> (a -> Bool) -> Gen a #

Generates a value that satisfies a predicate.

listOf :: Gen a -> Gen [a] #

Generates a list of random length. The maximum length depends on the size parameter.

vectorOf :: Int -> Gen a -> Gen [a] #

Generates a list of the given length.