Safe Haskell	Trustworthy
Language	Haskell2010

Test.QuickCheck.Modifiers

Contents

Type-level modifiers for changing generator behavior

Description

Modifiers for test data.

These types do things such as restricting the kind of test data that can be generated. They can be pattern-matched on in properties as a stylistic alternative to using explicit quantification.

Note: the contents of this module are re-exported by Test.QuickCheck. You do not need to import it directly.

Examples:

-- Functions cannot be shown (but see Test.QuickCheck.Function)
prop_TakeDropWhile (Blind p) (xs :: [A]) =
  takeWhile p xs ++ dropWhile p xs == xs

prop_TakeDrop (NonNegative n) (xs :: [A]) =
  take n xs ++ drop n xs == xs

-- cycle does not work for empty lists
prop_Cycle (NonNegative n) (NonEmpty (xs :: [A])) =
  take n (cycle xs) == take n (xs ++ cycle xs)

-- Instead of forAll orderedList
prop_Sort (Ordered (xs :: [OrdA])) =
  sort xs == xs

Synopsis

newtype Blind a = Blind {
- getBlind :: a
}
newtype Fixed a = Fixed {
- getFixed :: a
}
newtype OrderedList a = Ordered {
- getOrdered :: [a]
}
newtype NonEmptyList a = NonEmpty {
- getNonEmpty :: [a]
}
data InfiniteList a = InfiniteList {
- getInfiniteList :: [a]
- infiniteListInternalData :: InfiniteListInternalData a
}
newtype SortedList a = Sorted {
- getSorted :: [a]
}
newtype Positive a = Positive {
- getPositive :: a
}
newtype Negative a = Negative {
- getNegative :: a
}
newtype NonZero a = NonZero {
- getNonZero :: a
}
newtype NonNegative a = NonNegative {
- getNonNegative :: a
}
newtype NonPositive a = NonPositive {
- getNonPositive :: a
}
newtype Large a = Large {
- getLarge :: a
}
newtype Small a = Small {
- getSmall :: a
}
data Smart a = Smart Int a
newtype Shrink2 a = Shrink2 {
- getShrink2 :: a
}
data Shrinking s a = Shrinking s a
class ShrinkState s a where
- shrinkInit :: a -> s
- shrinkState :: a -> s -> [(a, s)]
newtype ASCIIString = ASCIIString {
- getASCIIString :: String
}
newtype UnicodeString = UnicodeString {
- getUnicodeString :: String
}
newtype PrintableString = PrintableString {
- getPrintableString :: String
}

Type-level modifiers for changing generator behavior

newtype Blind a Source #

Blind x: as x, but x does not have to be in the Show class.

Constructors

Blind
Fields getBlind :: a

Instances

newtype Fixed a Source #

Fixed x: as x, but will not be shrunk.

Constructors

Fixed
Fields getFixed :: a

Instances

Instances details

Functor Fixed Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Fixed a -> Fixed b (<$) :: a -> Fixed b -> Fixed a
Arbitrary a => Arbitrary (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Fixed a) Source # shrink :: Fixed a -> [Fixed a] Source #
Enum a => Enum (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Fixed a -> Fixed a pred :: Fixed a -> Fixed a toEnum :: Int -> Fixed a fromEnum :: Fixed a -> Int enumFrom :: Fixed a -> [Fixed a] enumFromThen :: Fixed a -> Fixed a -> [Fixed a] enumFromTo :: Fixed a -> Fixed a -> [Fixed a] enumFromThenTo :: Fixed a -> Fixed a -> Fixed a -> [Fixed a]
Num a => Num (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (+) :: Fixed a -> Fixed a -> Fixed a (-) :: Fixed a -> Fixed a -> Fixed a (*) :: Fixed a -> Fixed a -> Fixed a negate :: Fixed a -> Fixed a abs :: Fixed a -> Fixed a signum :: Fixed a -> Fixed a fromInteger :: Integer -> Fixed a
Read a => Read (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Fixed a) readList :: ReadS [Fixed a] readPrec :: ReadPrec (Fixed a) readListPrec :: ReadPrec [Fixed a]
Integral a => Integral (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods quot :: Fixed a -> Fixed a -> Fixed a rem :: Fixed a -> Fixed a -> Fixed a div :: Fixed a -> Fixed a -> Fixed a mod :: Fixed a -> Fixed a -> Fixed a quotRem :: Fixed a -> Fixed a -> (Fixed a, Fixed a) divMod :: Fixed a -> Fixed a -> (Fixed a, Fixed a) toInteger :: Fixed a -> Integer
Real a => Real (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods toRational :: Fixed a -> Rational
Show a => Show (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Fixed a -> ShowS show :: Fixed a -> String showList :: [Fixed a] -> ShowS
Eq a => Eq (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Fixed a -> Fixed a -> Bool (/=) :: Fixed a -> Fixed a -> Bool
Ord a => Ord (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Fixed a -> Fixed a -> Ordering (<) :: Fixed a -> Fixed a -> Bool (<=) :: Fixed a -> Fixed a -> Bool (>) :: Fixed a -> Fixed a -> Bool (>=) :: Fixed a -> Fixed a -> Bool max :: Fixed a -> Fixed a -> Fixed a min :: Fixed a -> Fixed a -> Fixed a

newtype OrderedList a Source #

Ordered xs: guarantees that xs is ordered.

Constructors

Ordered
Fields getOrdered :: [a]

Instances

Instances details

Functor OrderedList Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> OrderedList a -> OrderedList b (<$) :: a -> OrderedList b -> OrderedList a
(Ord a, Arbitrary a) => Arbitrary (OrderedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (OrderedList a) Source # shrink :: OrderedList a -> [OrderedList a] Source #
Read a => Read (OrderedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (OrderedList a) readList :: ReadS [OrderedList a] readPrec :: ReadPrec (OrderedList a) readListPrec :: ReadPrec [OrderedList a]
Show a => Show (OrderedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> OrderedList a -> ShowS show :: OrderedList a -> String showList :: [OrderedList a] -> ShowS
Eq a => Eq (OrderedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: OrderedList a -> OrderedList a -> Bool (/=) :: OrderedList a -> OrderedList a -> Bool
Ord a => Ord (OrderedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: OrderedList a -> OrderedList a -> Ordering (<) :: OrderedList a -> OrderedList a -> Bool (<=) :: OrderedList a -> OrderedList a -> Bool (>) :: OrderedList a -> OrderedList a -> Bool (>=) :: OrderedList a -> OrderedList a -> Bool max :: OrderedList a -> OrderedList a -> OrderedList a min :: OrderedList a -> OrderedList a -> OrderedList a

newtype NonEmptyList a Source #

NonEmpty xs: guarantees that xs is non-empty.

Constructors

NonEmpty
Fields getNonEmpty :: [a]

Instances

Instances details

Functor NonEmptyList Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonEmptyList a -> NonEmptyList b (<$) :: a -> NonEmptyList b -> NonEmptyList a
Arbitrary a => Arbitrary (NonEmptyList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonEmptyList a) Source # shrink :: NonEmptyList a -> [NonEmptyList a] Source #
Read a => Read (NonEmptyList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (NonEmptyList a) readList :: ReadS [NonEmptyList a] readPrec :: ReadPrec (NonEmptyList a) readListPrec :: ReadPrec [NonEmptyList a]
Show a => Show (NonEmptyList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> NonEmptyList a -> ShowS show :: NonEmptyList a -> String showList :: [NonEmptyList a] -> ShowS
Eq a => Eq (NonEmptyList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: NonEmptyList a -> NonEmptyList a -> Bool (/=) :: NonEmptyList a -> NonEmptyList a -> Bool
Ord a => Ord (NonEmptyList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: NonEmptyList a -> NonEmptyList a -> Ordering (<) :: NonEmptyList a -> NonEmptyList a -> Bool (<=) :: NonEmptyList a -> NonEmptyList a -> Bool (>) :: NonEmptyList a -> NonEmptyList a -> Bool (>=) :: NonEmptyList a -> NonEmptyList a -> Bool max :: NonEmptyList a -> NonEmptyList a -> NonEmptyList a min :: NonEmptyList a -> NonEmptyList a -> NonEmptyList a

data InfiniteList a Source #

InfiniteList xs _: guarantees that xs is an infinite list. When a counterexample is found, only prints the prefix of xs that was used by the program.

Here is a contrived example property:

prop_take_10 :: InfiniteList Char -> Bool
prop_take_10 (InfiniteList xs _) =
  or [ x == 'a' | x <- take 10 xs ]

In the following counterexample, the list must start with "bbbbbbbbbb" but the remaining (infinite) part can contain anything:

>>> quickCheck prop_take_10
*** Failed! Falsified (after 1 test and 14 shrinks):
"bbbbbbbbbb" ++ ...

Constructors

InfiniteList
Fields getInfiniteList :: [a] infiniteListInternalData :: InfiniteListInternalData a

Instances

Instances details

Arbitrary a => Arbitrary (InfiniteList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (InfiniteList a) Source # shrink :: InfiniteList a -> [InfiniteList a] Source #
Show a => Show (InfiniteList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> InfiniteList a -> ShowS show :: InfiniteList a -> String showList :: [InfiniteList a] -> ShowS

newtype SortedList a Source #

Sorted xs: guarantees that xs is sorted.

Constructors

Sorted
Fields getSorted :: [a]

Instances

Instances details

Functor SortedList Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> SortedList a -> SortedList b (<$) :: a -> SortedList b -> SortedList a
(Arbitrary a, Ord a) => Arbitrary (SortedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (SortedList a) Source # shrink :: SortedList a -> [SortedList a] Source #
Read a => Read (SortedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (SortedList a) readList :: ReadS [SortedList a] readPrec :: ReadPrec (SortedList a) readListPrec :: ReadPrec [SortedList a]
Show a => Show (SortedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> SortedList a -> ShowS show :: SortedList a -> String showList :: [SortedList a] -> ShowS
Eq a => Eq (SortedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: SortedList a -> SortedList a -> Bool (/=) :: SortedList a -> SortedList a -> Bool
Ord a => Ord (SortedList a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: SortedList a -> SortedList a -> Ordering (<) :: SortedList a -> SortedList a -> Bool (<=) :: SortedList a -> SortedList a -> Bool (>) :: SortedList a -> SortedList a -> Bool (>=) :: SortedList a -> SortedList a -> Bool max :: SortedList a -> SortedList a -> SortedList a min :: SortedList a -> SortedList a -> SortedList a

newtype Positive a Source #

Positive x: guarantees that x > 0.

Constructors

Positive
Fields getPositive :: a

Instances

Instances details

Functor Positive Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Positive a -> Positive b (<$) :: a -> Positive b -> Positive a
(Num a, Ord a, Arbitrary a) => Arbitrary (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Positive a) Source # shrink :: Positive a -> [Positive a] Source #
Enum a => Enum (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Positive a -> Positive a pred :: Positive a -> Positive a toEnum :: Int -> Positive a fromEnum :: Positive a -> Int enumFrom :: Positive a -> [Positive a] enumFromThen :: Positive a -> Positive a -> [Positive a] enumFromTo :: Positive a -> Positive a -> [Positive a] enumFromThenTo :: Positive a -> Positive a -> Positive a -> [Positive a]
Read a => Read (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Positive a) readList :: ReadS [Positive a] readPrec :: ReadPrec (Positive a) readListPrec :: ReadPrec [Positive a]
Show a => Show (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Positive a -> ShowS show :: Positive a -> String showList :: [Positive a] -> ShowS
Eq a => Eq (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Positive a -> Positive a -> Bool (/=) :: Positive a -> Positive a -> Bool
Ord a => Ord (Positive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Positive a -> Positive a -> Ordering (<) :: Positive a -> Positive a -> Bool (<=) :: Positive a -> Positive a -> Bool (>) :: Positive a -> Positive a -> Bool (>=) :: Positive a -> Positive a -> Bool max :: Positive a -> Positive a -> Positive a min :: Positive a -> Positive a -> Positive a

newtype Negative a Source #

Negative x: guarantees that x < 0.

Constructors

Negative
Fields getNegative :: a

Instances

Instances details

Functor Negative Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Negative a -> Negative b (<$) :: a -> Negative b -> Negative a
(Num a, Ord a, Arbitrary a) => Arbitrary (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Negative a) Source # shrink :: Negative a -> [Negative a] Source #
Enum a => Enum (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Negative a -> Negative a pred :: Negative a -> Negative a toEnum :: Int -> Negative a fromEnum :: Negative a -> Int enumFrom :: Negative a -> [Negative a] enumFromThen :: Negative a -> Negative a -> [Negative a] enumFromTo :: Negative a -> Negative a -> [Negative a] enumFromThenTo :: Negative a -> Negative a -> Negative a -> [Negative a]
Read a => Read (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Negative a) readList :: ReadS [Negative a] readPrec :: ReadPrec (Negative a) readListPrec :: ReadPrec [Negative a]
Show a => Show (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Negative a -> ShowS show :: Negative a -> String showList :: [Negative a] -> ShowS
Eq a => Eq (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Negative a -> Negative a -> Bool (/=) :: Negative a -> Negative a -> Bool
Ord a => Ord (Negative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Negative a -> Negative a -> Ordering (<) :: Negative a -> Negative a -> Bool (<=) :: Negative a -> Negative a -> Bool (>) :: Negative a -> Negative a -> Bool (>=) :: Negative a -> Negative a -> Bool max :: Negative a -> Negative a -> Negative a min :: Negative a -> Negative a -> Negative a

newtype NonZero a Source #

NonZero x: guarantees that x /= 0.

Constructors

NonZero
Fields getNonZero :: a

Instances

Instances details

Functor NonZero Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonZero a -> NonZero b (<$) :: a -> NonZero b -> NonZero a
(Num a, Eq a, Arbitrary a) => Arbitrary (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonZero a) Source # shrink :: NonZero a -> [NonZero a] Source #
Enum a => Enum (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: NonZero a -> NonZero a pred :: NonZero a -> NonZero a toEnum :: Int -> NonZero a fromEnum :: NonZero a -> Int enumFrom :: NonZero a -> [NonZero a] enumFromThen :: NonZero a -> NonZero a -> [NonZero a] enumFromTo :: NonZero a -> NonZero a -> [NonZero a] enumFromThenTo :: NonZero a -> NonZero a -> NonZero a -> [NonZero a]
Read a => Read (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (NonZero a) readList :: ReadS [NonZero a] readPrec :: ReadPrec (NonZero a) readListPrec :: ReadPrec [NonZero a]
Show a => Show (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> NonZero a -> ShowS show :: NonZero a -> String showList :: [NonZero a] -> ShowS
Eq a => Eq (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: NonZero a -> NonZero a -> Bool (/=) :: NonZero a -> NonZero a -> Bool
Ord a => Ord (NonZero a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: NonZero a -> NonZero a -> Ordering (<) :: NonZero a -> NonZero a -> Bool (<=) :: NonZero a -> NonZero a -> Bool (>) :: NonZero a -> NonZero a -> Bool (>=) :: NonZero a -> NonZero a -> Bool max :: NonZero a -> NonZero a -> NonZero a min :: NonZero a -> NonZero a -> NonZero a

newtype NonNegative a Source #

NonNegative x: guarantees that x >= 0.

Constructors

NonNegative
Fields getNonNegative :: a

Instances

Instances details

Functor NonNegative Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonNegative a -> NonNegative b (<$) :: a -> NonNegative b -> NonNegative a
(Num a, Ord a, Arbitrary a) => Arbitrary (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonNegative a) Source # shrink :: NonNegative a -> [NonNegative a] Source #
Enum a => Enum (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: NonNegative a -> NonNegative a pred :: NonNegative a -> NonNegative a toEnum :: Int -> NonNegative a fromEnum :: NonNegative a -> Int enumFrom :: NonNegative a -> [NonNegative a] enumFromThen :: NonNegative a -> NonNegative a -> [NonNegative a] enumFromTo :: NonNegative a -> NonNegative a -> [NonNegative a] enumFromThenTo :: NonNegative a -> NonNegative a -> NonNegative a -> [NonNegative a]
Read a => Read (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (NonNegative a) readList :: ReadS [NonNegative a] readPrec :: ReadPrec (NonNegative a) readListPrec :: ReadPrec [NonNegative a]
Show a => Show (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> NonNegative a -> ShowS show :: NonNegative a -> String showList :: [NonNegative a] -> ShowS
Eq a => Eq (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: NonNegative a -> NonNegative a -> Bool (/=) :: NonNegative a -> NonNegative a -> Bool
Ord a => Ord (NonNegative a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: NonNegative a -> NonNegative a -> Ordering (<) :: NonNegative a -> NonNegative a -> Bool (<=) :: NonNegative a -> NonNegative a -> Bool (>) :: NonNegative a -> NonNegative a -> Bool (>=) :: NonNegative a -> NonNegative a -> Bool max :: NonNegative a -> NonNegative a -> NonNegative a min :: NonNegative a -> NonNegative a -> NonNegative a

newtype NonPositive a Source #

NonPositive x: guarantees that x <= 0.

Constructors

NonPositive
Fields getNonPositive :: a

Instances

Instances details

Functor NonPositive Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonPositive a -> NonPositive b (<$) :: a -> NonPositive b -> NonPositive a
(Num a, Ord a, Arbitrary a) => Arbitrary (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (NonPositive a) Source # shrink :: NonPositive a -> [NonPositive a] Source #
Enum a => Enum (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: NonPositive a -> NonPositive a pred :: NonPositive a -> NonPositive a toEnum :: Int -> NonPositive a fromEnum :: NonPositive a -> Int enumFrom :: NonPositive a -> [NonPositive a] enumFromThen :: NonPositive a -> NonPositive a -> [NonPositive a] enumFromTo :: NonPositive a -> NonPositive a -> [NonPositive a] enumFromThenTo :: NonPositive a -> NonPositive a -> NonPositive a -> [NonPositive a]
Read a => Read (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (NonPositive a) readList :: ReadS [NonPositive a] readPrec :: ReadPrec (NonPositive a) readListPrec :: ReadPrec [NonPositive a]
Show a => Show (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> NonPositive a -> ShowS show :: NonPositive a -> String showList :: [NonPositive a] -> ShowS
Eq a => Eq (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: NonPositive a -> NonPositive a -> Bool (/=) :: NonPositive a -> NonPositive a -> Bool
Ord a => Ord (NonPositive a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: NonPositive a -> NonPositive a -> Ordering (<) :: NonPositive a -> NonPositive a -> Bool (<=) :: NonPositive a -> NonPositive a -> Bool (>) :: NonPositive a -> NonPositive a -> Bool (>=) :: NonPositive a -> NonPositive a -> Bool max :: NonPositive a -> NonPositive a -> NonPositive a min :: NonPositive a -> NonPositive a -> NonPositive a

newtype Large a Source #

Large x: by default, QuickCheck generates Ints drawn from a small range. Large Int gives you values drawn from the entire range instead.

Constructors

Large
Fields getLarge :: a

Instances

Instances details

Functor Large Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Large a -> Large b (<$) :: a -> Large b -> Large a
(Integral a, Bounded a) => Arbitrary (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Large a) Source # shrink :: Large a -> [Large a] Source #
Enum a => Enum (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Large a -> Large a pred :: Large a -> Large a toEnum :: Int -> Large a fromEnum :: Large a -> Int enumFrom :: Large a -> [Large a] enumFromThen :: Large a -> Large a -> [Large a] enumFromTo :: Large a -> Large a -> [Large a] enumFromThenTo :: Large a -> Large a -> Large a -> [Large a]
Ix a => Ix (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods range :: (Large a, Large a) -> [Large a] index :: (Large a, Large a) -> Large a -> Int unsafeIndex :: (Large a, Large a) -> Large a -> Int inRange :: (Large a, Large a) -> Large a -> Bool rangeSize :: (Large a, Large a) -> Int unsafeRangeSize :: (Large a, Large a) -> Int
Num a => Num (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (+) :: Large a -> Large a -> Large a (-) :: Large a -> Large a -> Large a (*) :: Large a -> Large a -> Large a negate :: Large a -> Large a abs :: Large a -> Large a signum :: Large a -> Large a fromInteger :: Integer -> Large a
Read a => Read (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Large a) readList :: ReadS [Large a] readPrec :: ReadPrec (Large a) readListPrec :: ReadPrec [Large a]
Integral a => Integral (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods quot :: Large a -> Large a -> Large a rem :: Large a -> Large a -> Large a div :: Large a -> Large a -> Large a mod :: Large a -> Large a -> Large a quotRem :: Large a -> Large a -> (Large a, Large a) divMod :: Large a -> Large a -> (Large a, Large a) toInteger :: Large a -> Integer
Real a => Real (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods toRational :: Large a -> Rational
Show a => Show (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Large a -> ShowS show :: Large a -> String showList :: [Large a] -> ShowS
Eq a => Eq (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Large a -> Large a -> Bool (/=) :: Large a -> Large a -> Bool
Ord a => Ord (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Large a -> Large a -> Ordering (<) :: Large a -> Large a -> Bool (<=) :: Large a -> Large a -> Bool (>) :: Large a -> Large a -> Bool (>=) :: Large a -> Large a -> Bool max :: Large a -> Large a -> Large a min :: Large a -> Large a -> Large a

newtype Small a Source #

Small x: generates values of x drawn from a small range. The opposite of Large.

Constructors

Small
Fields getSmall :: a

Instances

Instances details

Functor Small Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Small a -> Small b (<$) :: a -> Small b -> Small a
Integral a => Arbitrary (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Small a) Source # shrink :: Small a -> [Small a] Source #
Enum a => Enum (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Small a -> Small a pred :: Small a -> Small a toEnum :: Int -> Small a fromEnum :: Small a -> Int enumFrom :: Small a -> [Small a] enumFromThen :: Small a -> Small a -> [Small a] enumFromTo :: Small a -> Small a -> [Small a] enumFromThenTo :: Small a -> Small a -> Small a -> [Small a]
Ix a => Ix (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods range :: (Small a, Small a) -> [Small a] index :: (Small a, Small a) -> Small a -> Int unsafeIndex :: (Small a, Small a) -> Small a -> Int inRange :: (Small a, Small a) -> Small a -> Bool rangeSize :: (Small a, Small a) -> Int unsafeRangeSize :: (Small a, Small a) -> Int
Num a => Num (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (+) :: Small a -> Small a -> Small a (-) :: Small a -> Small a -> Small a (*) :: Small a -> Small a -> Small a negate :: Small a -> Small a abs :: Small a -> Small a signum :: Small a -> Small a fromInteger :: Integer -> Small a
Read a => Read (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Small a) readList :: ReadS [Small a] readPrec :: ReadPrec (Small a) readListPrec :: ReadPrec [Small a]
Integral a => Integral (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods quot :: Small a -> Small a -> Small a rem :: Small a -> Small a -> Small a div :: Small a -> Small a -> Small a mod :: Small a -> Small a -> Small a quotRem :: Small a -> Small a -> (Small a, Small a) divMod :: Small a -> Small a -> (Small a, Small a) toInteger :: Small a -> Integer
Real a => Real (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods toRational :: Small a -> Rational
Show a => Show (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Small a -> ShowS show :: Small a -> String showList :: [Small a] -> ShowS
Eq a => Eq (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Small a -> Small a -> Bool (/=) :: Small a -> Small a -> Bool
Ord a => Ord (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Small a -> Small a -> Ordering (<) :: Small a -> Small a -> Bool (<=) :: Small a -> Small a -> Bool (>) :: Small a -> Small a -> Bool (>=) :: Small a -> Small a -> Bool max :: Small a -> Small a -> Small a min :: Small a -> Small a -> Small a

data Smart a Source #

Smart _ x: tries a different order when shrinking.

Constructors

Smart Int a

Instances

Instances details

Functor Smart Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Smart a -> Smart b (<$) :: a -> Smart b -> Smart a
Arbitrary a => Arbitrary (Smart a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Smart a) Source # shrink :: Smart a -> [Smart a] Source #
Show a => Show (Smart a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Smart a -> ShowS show :: Smart a -> String showList :: [Smart a] -> ShowS

newtype Shrink2 a Source #

Shrink2 x: allows 2 shrinking steps at the same time when shrinking x

Constructors

Shrink2
Fields getShrink2 :: a

Instances

Instances details

Functor Shrink2 Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Shrink2 a -> Shrink2 b (<$) :: a -> Shrink2 b -> Shrink2 a
Arbitrary a => Arbitrary (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrink2 a) Source # shrink :: Shrink2 a -> [Shrink2 a] Source #
Enum a => Enum (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Shrink2 a -> Shrink2 a pred :: Shrink2 a -> Shrink2 a toEnum :: Int -> Shrink2 a fromEnum :: Shrink2 a -> Int enumFrom :: Shrink2 a -> [Shrink2 a] enumFromThen :: Shrink2 a -> Shrink2 a -> [Shrink2 a] enumFromTo :: Shrink2 a -> Shrink2 a -> [Shrink2 a] enumFromThenTo :: Shrink2 a -> Shrink2 a -> Shrink2 a -> [Shrink2 a]
Num a => Num (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (+) :: Shrink2 a -> Shrink2 a -> Shrink2 a (-) :: Shrink2 a -> Shrink2 a -> Shrink2 a (*) :: Shrink2 a -> Shrink2 a -> Shrink2 a negate :: Shrink2 a -> Shrink2 a abs :: Shrink2 a -> Shrink2 a signum :: Shrink2 a -> Shrink2 a fromInteger :: Integer -> Shrink2 a
Read a => Read (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS (Shrink2 a) readList :: ReadS [Shrink2 a] readPrec :: ReadPrec (Shrink2 a) readListPrec :: ReadPrec [Shrink2 a]
Integral a => Integral (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods quot :: Shrink2 a -> Shrink2 a -> Shrink2 a rem :: Shrink2 a -> Shrink2 a -> Shrink2 a div :: Shrink2 a -> Shrink2 a -> Shrink2 a mod :: Shrink2 a -> Shrink2 a -> Shrink2 a quotRem :: Shrink2 a -> Shrink2 a -> (Shrink2 a, Shrink2 a) divMod :: Shrink2 a -> Shrink2 a -> (Shrink2 a, Shrink2 a) toInteger :: Shrink2 a -> Integer
Real a => Real (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods toRational :: Shrink2 a -> Rational
Show a => Show (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Shrink2 a -> ShowS show :: Shrink2 a -> String showList :: [Shrink2 a] -> ShowS
Eq a => Eq (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Shrink2 a -> Shrink2 a -> Bool (/=) :: Shrink2 a -> Shrink2 a -> Bool
Ord a => Ord (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Shrink2 a -> Shrink2 a -> Ordering (<) :: Shrink2 a -> Shrink2 a -> Bool (<=) :: Shrink2 a -> Shrink2 a -> Bool (>) :: Shrink2 a -> Shrink2 a -> Bool (>=) :: Shrink2 a -> Shrink2 a -> Bool max :: Shrink2 a -> Shrink2 a -> Shrink2 a min :: Shrink2 a -> Shrink2 a -> Shrink2 a

data Shrinking s a Source #

Shrinking _ x: allows for maintaining a state during shrinking.

Constructors

Shrinking s a

Instances

Instances details

Functor (Shrinking s) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Shrinking s a -> Shrinking s b (<$) :: a -> Shrinking s b -> Shrinking s a
(Arbitrary a, ShrinkState s a) => Arbitrary (Shrinking s a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Shrinking s a) Source # shrink :: Shrinking s a -> [Shrinking s a] Source #
Show a => Show (Shrinking s a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Shrinking s a -> ShowS show :: Shrinking s a -> String showList :: [Shrinking s a] -> ShowS

class ShrinkState s a where Source #

Methods

shrinkInit :: a -> s Source #

shrinkState :: a -> s -> [(a, s)] Source #

newtype ASCIIString Source #

ASCIIString: generates an ASCII string.

Constructors

ASCIIString
Fields getASCIIString :: String

Instances

Instances details

Arbitrary ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen ASCIIString Source # shrink :: ASCIIString -> [ASCIIString] Source #
Read ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS ASCIIString readList :: ReadS [ASCIIString] readPrec :: ReadPrec ASCIIString readListPrec :: ReadPrec [ASCIIString]
Show ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> ASCIIString -> ShowS show :: ASCIIString -> String showList :: [ASCIIString] -> ShowS
Eq ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: ASCIIString -> ASCIIString -> Bool (/=) :: ASCIIString -> ASCIIString -> Bool
Ord ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: ASCIIString -> ASCIIString -> Ordering (<) :: ASCIIString -> ASCIIString -> Bool (<=) :: ASCIIString -> ASCIIString -> Bool (>) :: ASCIIString -> ASCIIString -> Bool (>=) :: ASCIIString -> ASCIIString -> Bool max :: ASCIIString -> ASCIIString -> ASCIIString min :: ASCIIString -> ASCIIString -> ASCIIString

newtype UnicodeString Source #

UnicodeString: generates a unicode String. The string will not contain surrogate pairs.

Constructors

UnicodeString
Fields getUnicodeString :: String

Instances

Instances details

Arbitrary UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen UnicodeString Source # shrink :: UnicodeString -> [UnicodeString] Source #
Read UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS UnicodeString readList :: ReadS [UnicodeString] readPrec :: ReadPrec UnicodeString readListPrec :: ReadPrec [UnicodeString]
Show UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> UnicodeString -> ShowS show :: UnicodeString -> String showList :: [UnicodeString] -> ShowS
Eq UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: UnicodeString -> UnicodeString -> Bool (/=) :: UnicodeString -> UnicodeString -> Bool
Ord UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: UnicodeString -> UnicodeString -> Ordering (<) :: UnicodeString -> UnicodeString -> Bool (<=) :: UnicodeString -> UnicodeString -> Bool (>) :: UnicodeString -> UnicodeString -> Bool (>=) :: UnicodeString -> UnicodeString -> Bool max :: UnicodeString -> UnicodeString -> UnicodeString min :: UnicodeString -> UnicodeString -> UnicodeString

newtype PrintableString Source #

PrintableString: generates a printable unicode String. The string will not contain surrogate pairs.

Constructors

PrintableString
Fields getPrintableString :: String

Instances

Instances details

Arbitrary PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen PrintableString Source # shrink :: PrintableString -> [PrintableString] Source #
Read PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods readsPrec :: Int -> ReadS PrintableString readList :: ReadS [PrintableString] readPrec :: ReadPrec PrintableString readListPrec :: ReadPrec [PrintableString]
Show PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> PrintableString -> ShowS show :: PrintableString -> String showList :: [PrintableString] -> ShowS
Eq PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: PrintableString -> PrintableString -> Bool (/=) :: PrintableString -> PrintableString -> Bool
Ord PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: PrintableString -> PrintableString -> Ordering (<) :: PrintableString -> PrintableString -> Bool (<=) :: PrintableString -> PrintableString -> Bool (>) :: PrintableString -> PrintableString -> Bool (>=) :: PrintableString -> PrintableString -> Bool max :: PrintableString -> PrintableString -> PrintableString min :: PrintableString -> PrintableString -> PrintableString

Functor Blind Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Blind a -> Blind b (<$) :: a -> Blind b -> Blind a
Arbitrary a => Arbitrary (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen (Blind a) Source # shrink :: Blind a -> [Blind a] Source #
Enum a => Enum (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods succ :: Blind a -> Blind a pred :: Blind a -> Blind a toEnum :: Int -> Blind a fromEnum :: Blind a -> Int enumFrom :: Blind a -> [Blind a] enumFromThen :: Blind a -> Blind a -> [Blind a] enumFromTo :: Blind a -> Blind a -> [Blind a] enumFromThenTo :: Blind a -> Blind a -> Blind a -> [Blind a]
Num a => Num (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (+) :: Blind a -> Blind a -> Blind a (-) :: Blind a -> Blind a -> Blind a (*) :: Blind a -> Blind a -> Blind a negate :: Blind a -> Blind a abs :: Blind a -> Blind a signum :: Blind a -> Blind a fromInteger :: Integer -> Blind a
Integral a => Integral (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods quot :: Blind a -> Blind a -> Blind a rem :: Blind a -> Blind a -> Blind a div :: Blind a -> Blind a -> Blind a mod :: Blind a -> Blind a -> Blind a quotRem :: Blind a -> Blind a -> (Blind a, Blind a) divMod :: Blind a -> Blind a -> (Blind a, Blind a) toInteger :: Blind a -> Integer
Real a => Real (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods toRational :: Blind a -> Rational
Show (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods showsPrec :: Int -> Blind a -> ShowS show :: Blind a -> String showList :: [Blind a] -> ShowS
Eq a => Eq (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Blind a -> Blind a -> Bool (/=) :: Blind a -> Blind a -> Bool
Ord a => Ord (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods compare :: Blind a -> Blind a -> Ordering (<) :: Blind a -> Blind a -> Bool (<=) :: Blind a -> Blind a -> Bool (>) :: Blind a -> Blind a -> Bool (>=) :: Blind a -> Blind a -> Bool max :: Blind a -> Blind a -> Blind a min :: Blind a -> Blind a -> Blind a