Module QCheck.Shrink

module Shrink: sig .. end

Shrink Values

Shrinking is used to reduce the size of a counter-example. It tries to make the counter-example smaller by decreasing it, or removing elements, until the property to test holds again; then it returns the smallest value that still made the test fail

type 'a t = 'a -> 'a QCheck.Iter.t

Given a counter-example, return an iterator on smaller versions of the counter-example

val nil : 'a t

No shrink

val int : int t

val option : 'a t -> 'a option t

val string : string t

val list : ?shrink:'a t -> 'a list t

Try to shrink lists by removing elements one by one.

shrink : if provided, will be used to also try to reduce the elements of the list themselves (e.g. in an int list one can try to decrease the integers)

val array : ?shrink:'a t -> 'a array t

Shrink an array.

shrink : see QCheck.Shrink.list

val pair : 'a t -> 'b t -> ('a * 'b) t

val triple : 'a t ->
       'b t -> 'c t -> ('a * 'b * 'c) t

val quad : 'a t ->
       'b t ->
       'c t ->
       'd t -> ('a * 'b * 'c * 'd) t