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CHANGELOG.md

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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.