Changelog of @hackage/quickcheck-state-machine 0.4.0

0.4.0 (2018-8-21)

• Major rewrite, addressing many issues:

  • The output of sequential runs now shows a diff of how the model changed in each step (related to issue #77);

  • The datatype of actions was renamed to commands and no longer is a GADT (discussed in issue #170, also makes issue #196 obsolete);

  • Commands can now return multiple references (issue #197);

  • Global invariants can now more easily be expressed (issue #200);

  • Counterexamples are now printed when post-conditions fail (issue #172).

0.3.1 (2018-1-15)

• Remove upper bounds for dependencies, to easier keep up with Stackage nightly.

0.3.0 (2017-12-15)

• A propositional logic module was added to help provide better counterexamples when pre- and post-conditions don't hold;

• Generation of parallel programs was improved (base on a comment by Hans Svensson about how Erlang QuickCheck does it);

• Support for semantics that might fail was added;

• Pretty printing of counterexamples was improved.

0.2.0

• Z-inspired definition of relations and associated operations were added to help defining concise and showable models;

• Template Haskell derivation of shrink and type classes: Show, Constructors, HFunctor, HFoldable, HTraversable;

• New and more flexible combinators for building sequential and parallel properties replaced the old clunky ones;

• Circular buffer example was added;

• Two examples of how to test CRUD web applications were added.

0.1.0

• The API was simplified, thanks to ideas stolen from Hedgehog.

0.0.0

• Initial release.