PIT
junit-quickcheck
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| PIT | junit-quickcheck | |
|---|---|---|
| 1 | 5 | |
| 1,622 | 951 | |
| - | - | |
| 8.3 | 7.3 | |
| 7 days ago | 9 days ago | |
| Java | Java | |
| Apache License 2.0 | MIT License |
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PIT
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Fuzzing Java in OSS-Fuzz
Another great tool is Pitest for mutation testing on the JVM (make coverage more meaningful) https://github.com/hcoles/pitest
junit-quickcheck
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Need your feedback on a tool that auto-generates unit tests for java code
For anyone interested, there's also https://github.com/pholser/junit-quickcheck . Haven't used it myself but looks like an interesting library to explore. It's based on QuickCheck as well AFAIK.
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Coding Challenge
Thank you for the insightful reply. I did struggle to convert the original algorithm I wrote (with while loops / continue / break) to a more functional style using unfold, and also faced an issue with the type signatures when I tried to break down the contents of Stream.unfoldRight to multiple functions, which is reflected to the messy state you mentioned. Regarding property based testing, I used junit-quickcheck and the "symmetry" property check was one I meant to write but wasn't quite sure how to create a generator for it. I created an issue to track my attempt to incorporate your suggestions in case you are interested in following this. Thanks again!
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Does anyone have any advice for writing better Java tests.
A quick Google search shows that java has a library for this (here) but I've never used it in java so can't attest to it.
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GitHub Copilot for JetBrains and Neovim
QuickcCheck-type tools (generators for tests that know about the edge cases of a domain - e. g. for the domain of numbers considering things like 0, the infinities, various almost-and-just-over powers of two, NaN and mantissas for floats, etc.):
* QuickCheck: https://hackage.haskell.org/package/QuickCheck
* Hypothesis: https://hypothesis.readthedocs.io/en/latest/
* JUnit QuickCheck: https://github.com/pholser/junit-quickcheck
Fuzz testing tools (tools which mutate the inputs to a program in order to find interesting / failing states in that program). Generally paired with code coverage:
* American Fuzzy Lop (AFL): https://github.com/google/AFL
* JQF: https://github.com/rohanpadhye/JQF
Mutation / Fault based test tools (review your existing unit coverage and try to introduce changes to your _production_ code that none of your tests catch)
* PITest: https://pitest.org/
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Fuzzing Java in OSS-Fuzz
If you want an easy way to have better mutation coverage, check out property based testing. Eg junit-quickcheck for Java.
https://github.com/pholser/junit-quickcheck
What are some alternatives?
Mutability Detector - Lightweight analysis tool for detecting mutability in Java classes
jqwik - Property-Based Testing on the JUnit Platform
Selenide - Concise UI Tests with Java!
jazzer - Coverage-guided, in-process fuzzing for the JVM
JMock - An expressive Mock Object library for Test Driven Development
copilot.vim - Neovim plugin for GitHub Copilot
vscode-java-test - Run and debug Java test cases in Visual Studio Code.
JQF - JQF + Zest: Coverage-guided semantic fuzzing for Java.
Spock - The Enterprise-ready testing and specification framework.
copilot-docs - Documentation for GitHub Copilot
PowerMock - PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
libfuzzer-workshop - Repository for materials of "Modern fuzzing of C/C++ Projects" workshop.