Skip to main content

Pythonic library for QuickCheck-style randomized testing and SmallCheck-style exhaustive testing of the same test suite.

Project description

A library for property-based testing in two different ways:

  1. “QuickCheck” - randomly generated inputs

  2. “SmallCheck” - exhaustively enumerated inputs

These testing approaches are named for the pioneering Haskell libraries. The two approaches truly shine when used together - once a property is found to be refutable by some probably-huge-and-crazy random input, it is often worth investing the CPU time to find the _smallest_ counterexample.

This library is a brand new work-in-progress (see commit log for dates) with known issues:

  • Does not have randomly generated strings just yet.

  • No existential quantification yet, but smallcheck does allow it!

  • Needs more thorough testing.

  • Needs to be able to test that a property always throws an exception.

  • Needs lots more combinators.

  • Needs one-liner interface rather than checking status of test cases.

Installation & Usage

(TODO: Describe in more detail. For now, read doublecheck/ and doublecheck/

$ pip install doublecheck $ python >>> from doublecheck import * >>> ForAll(lambda i: i > 0, PosInts()).quickcheck(100000).status ‘Certain’

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

doublecheck-0.1pre2012-05-08T10-05-14.tar.gz (5.1 kB view hashes)

Uploaded source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page