Module proper_gen

Description
Data Types
Function Index
Function Details

Generator subsystem and generators for basic types.

Version: Jun 20 2016 16:27:12

Authors: Manolis Papadakis.

Description

Generator subsystem and generators for basic types.

You can use these functions to try out the random instance generation and shrinking subsystems.

CAUTION: These functions should never be used inside properties. They are meant for demonstration purposes only.

Data Types

instance()

instance() = term()

A value produced by the random instance generator.

seed()

seed() = 
    {non_neg_integer(), non_neg_integer(), non_neg_integer()}

size()

size() = non_neg_integer()

Function Index

pick/1	Equivalent to `pick(Type, 10)`.
pick/2	Equivalent to `pick(Type, Size, os:timestamp())`.
pick/3	Generates a random instance of `Type`, of size `Size` with seed `Seed`.
sample/1	Equivalent to `sample(Type, 10, 20)`.
sample/3	Generates and prints one random instance of `Type` for each size from `StartSize` up to `EndSize`.
sampleshrink/1	Equivalent to `sampleshrink(Type, 10)`.
sampleshrink/2	Generates a random instance of `Type`, of size `Size`, then shrinks it as far as it goes.

Function Details

pick/1

pick(Type :: proper_types:raw_type()) -> {ok, instance()} | error

Equivalent to pick(Type, 10).

pick/2

pick(Type :: proper_types:raw_type(), Size :: size()) ->
        {ok, instance()} | error

Equivalent to pick(Type, Size, os:timestamp()).

pick/3

pick(Type :: proper_types:raw_type(),
     Size :: size(),
     Seed :: seed()) ->
        {ok, instance()} | error

Generates a random instance of Type, of size Size with seed Seed.

sample/1

sample(Type :: proper_types:raw_type()) -> ok

Equivalent to sample(Type, 10, 20).

sample/3

sample(Type :: proper_types:raw_type(),
       StartSize :: size(),
       EndSize :: size()) ->
          ok

Generates and prints one random instance of Type for each size from StartSize up to EndSize.

sampleshrink/1

sampleshrink(Type :: proper_types:raw_type()) -> ok

Equivalent to sampleshrink(Type, 10).

sampleshrink/2

sampleshrink(Type :: proper_types:raw_type(), Size :: size()) ->
                ok

Generates a random instance of Type, of size Size, then shrinks it as far as it goes. The value produced on each step of the shrinking process is printed on the screen.

Generated by EDoc, Jun 20 2016, 16:27:12.