QuickCheck
hspec
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| QuickCheck | hspec | |
|---|---|---|
| 1 | 2 | |
| 691 | 736 | |
| - | 0.1% | |
| 7.7 | 6.4 | |
| 8 days ago | about 2 months ago | |
| Haskell | Haskell | |
| BSD 3-clause "New" or "Revised" License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
QuickCheck
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Ask HN: Is writing a math proof like programming without ever running your code?
Quickcheck is a Haskell testing library which allows the programmer to write propositions about how a function should behave, and the library will try to find cases which falsify the proposition.
If my understanding is correct, it can't "prove" any properties, only disprove them.
For concretely proving properties of a program, you would need something like Idris's dependent type system, where you can prove that a function always returns a sorted list, for example.
hspec
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Show HN: IHP v1.0 (Batteries-included web framework built on Haskell and Nix)
While of course Haskell has more normal testing infrastructure available (eg. https://hspec.github.io/), my favorite bit of Haskell testing is QuickCheck, which IIUC started life in Haskell and has been reimplemented in other languages with various degrees of effectiveness and various degrees of connection to the original project.
John Hughes (not the filmmaker) gives a great talk about it: https://youtu.be/zi0rHwfiX1Q
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How can I write tests in Haskell, I’m having trouble understanding how to install a test module?
hspec is a great library for testing, you can also use it to group different kind of tests, like property-based tests with QuickCheck.
What are some alternatives?
hedgehog - Release with confidence, state-of-the-art property testing for Haskell.
tasty - Modern and extensible testing framework for Haskell
hspec-wai - Helpers to test WAI applications with Hspec
HUnit-Plus - A test framework expanding on the HUnit Haskell testing package
HUnit - A unit testing framework for Haskell
quickspec - Equational laws for free
hspec-checkers - Allows to use checkers properties from hspec
quickcheck-state-machine - Test monadic programs using state machine based models
HTF - Haskell Test Framework
fuzzcheck - A library for testing monadic code in the spirit of QuickCheck