Safe Haskell	Trustworthy
Language	Haskell98

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.

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 Positive a = Positive {
- getPositive :: a
}
newtype NonZero a = NonZero {
- getNonZero :: a
}
newtype NonNegative a = NonNegative {
- getNonNegative :: 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
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

newtype Fixed a Source #

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

Constructors

Fixed
Fields getFixed :: a

Instances

Functor Fixed Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Fixed a -> Fixed b # (<$) :: a -> Fixed b -> Fixed a #
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] #
Eq a => Eq (Fixed a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Fixed a -> Fixed a -> Bool # (/=) :: Fixed a -> Fixed a -> Bool #
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 #
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 #
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 #
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] #
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 #
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 #

newtype OrderedList a Source #

Ordered xs: guarantees that xs is ordered.

Constructors

Ordered
Fields getOrdered :: [a]

Instances

Functor OrderedList Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> OrderedList a -> OrderedList b # (<$) :: a -> OrderedList b -> OrderedList a #
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 #
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 #
(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 #

newtype NonEmptyList a Source #

NonEmpty xs: guarantees that xs is non-empty.

Constructors

NonEmpty
Fields getNonEmpty :: [a]

Instances

Functor NonEmptyList Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonEmptyList a -> NonEmptyList b # (<$) :: a -> NonEmptyList b -> NonEmptyList a #
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 #
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 #
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 #

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! Falsifiable (after 1 test and 14 shrinks):
"bbbbbbbbbb" ++ ...

Constructors

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

Instances

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 #
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 #

newtype Positive a Source #

Positive x: guarantees that x > 0.

Constructors

Positive
Fields getPositive :: a

Instances

Functor Positive Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Positive a -> Positive b # (<$) :: a -> Positive b -> Positive a #
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] #
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 #
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 #
(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 #

newtype NonZero a Source #

NonZero x: guarantees that x /= 0.

Constructors

NonZero
Fields getNonZero :: a

Instances

Functor NonZero Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonZero a -> NonZero b # (<$) :: a -> NonZero b -> NonZero a #
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] #
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 #
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 #
(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 #

newtype NonNegative a Source #

NonNegative x: guarantees that x >= 0.

Constructors

NonNegative
Fields getNonNegative :: a

Instances

Functor NonNegative Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> NonNegative a -> NonNegative b # (<$) :: a -> NonNegative b -> NonNegative a #
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] #
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 #
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 #
(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 #

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

Functor Large Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Large a -> Large b # (<$) :: a -> Large b -> Large a #
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] #
Eq a => Eq (Large a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Large a -> Large a -> Bool # (/=) :: Large a -> Large a -> Bool #
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 #
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 #
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 #
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] #
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 #
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
(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 #

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

Functor Small Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Small a -> Small b # (<$) :: a -> Small b -> Small a #
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] #
Eq a => Eq (Small a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Small a -> Small a -> Bool # (/=) :: Small a -> Small a -> Bool #
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 #
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 #
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 #
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] #
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 #
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
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 #

data Smart a Source #

Smart _ x: tries a different order when shrinking.

Constructors

Smart Int a

Instances

Functor Smart Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Smart a -> Smart b # (<$) :: a -> Smart b -> Smart a #
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 #
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 #

newtype Shrink2 a Source #

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

Constructors

Shrink2
Fields getShrink2 :: a

Instances

Functor Shrink2 Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Shrink2 a -> Shrink2 b # (<$) :: a -> Shrink2 b -> Shrink2 a #
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] #
Eq a => Eq (Shrink2 a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Shrink2 a -> Shrink2 a -> Bool # (/=) :: Shrink2 a -> Shrink2 a -> Bool #
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 #
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 #
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 #
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] #
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 #
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 #

data Shrinking s a Source #

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

Constructors

Shrinking s a

Instances

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 #
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 #
(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 #

class ShrinkState s a where Source #

Minimal complete definition

shrinkInit, shrinkState

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

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 #
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 #
Arbitrary ASCIIString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen ASCIIString Source # shrink :: ASCIIString -> [ASCIIString] Source #

newtype UnicodeString Source #

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

Constructors

UnicodeString
Fields getUnicodeString :: String

Instances

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 #
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 #
Arbitrary UnicodeString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen UnicodeString Source # shrink :: UnicodeString -> [UnicodeString] Source #

newtype PrintableString Source #

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

Constructors

PrintableString
Fields getPrintableString :: String

Instances

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 #
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 #
Arbitrary PrintableString Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods arbitrary :: Gen PrintableString Source # shrink :: PrintableString -> [PrintableString] Source #

Functor Blind Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods fmap :: (a -> b) -> Blind a -> Blind b # (<$) :: a -> Blind b -> Blind a #
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] #
Eq a => Eq (Blind a) Source #
Instance details Defined in Test.QuickCheck.Modifiers Methods (==) :: Blind a -> Blind a -> Bool # (/=) :: Blind a -> Blind a -> Bool #
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 #
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 #
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 #
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 #
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 #