jqwik
junit-quickcheck
Our great sponsors
jqwik | junit-quickcheck | |
---|---|---|
7 | 5 | |
524 | 952 | |
2.9% | - | |
9.2 | 7.3 | |
2 days ago | 3 days ago | |
Java | Java | |
Eclipse Public License 2.0 | 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.
jqwik
- Jqwik – Property-Based Testing on the JUnit Platform
- Any library you would like to recommend to others as it helps you a lot? For me, mapstruct is one of them. Hopefully I would hear some other nice libraries I never try.
-
Built a library to help generate test pojos with relevant but random data. I’d love some feedback.
See https://jqwik.net
- I just implemented a method that checks if a binary tree is symmetric, and now I want to test it with Junit. Do I need to manually create a bunch of trees, or is there an easier way?
-
Simple example of property-based testing
Once we knew which property to use it was very straightforward to add a property-based test for it. We used the jqwik library. We like it because it has very good documentation and it is integrated with Junit.
-
must known frameworks/libs/tech, every senior java developer must know(?)
Jqwik - I love property based testing and the way it can make you think differently about some of your code.
-
Mutation testing java projects
Different to mutation testing, but on a semi-relatednpath, I've found property-based testing (e.g. https://jqwik.net/) to be valuable - thinking about the “shape“ of the expected output and getting a bunch of pseudorandom tests is pretty handy, especially for utility functions.
junit-quickcheck
-
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.
-
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!
-
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.
-
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/
-
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?
Deep Dive - Fluent assertions library for Java
jazzer - Coverage-guided, in-process fuzzing for the JVM
JQF - JQF + Zest: Coverage-guided semantic fuzzing for Java.
copilot.vim - Neovim plugin for GitHub Copilot
Testcontainers - Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
webtau - WebTau (web test automation) is a testing API, command line tool and a framework to write unit, integration and end-to-end tests. Test across REST-API, WebSocket, GraphQL, Browser, Database, CLI and Business Logic with a consistent set of matchers and concepts. REPL mode speeds-up tests development. Rich reporting cuts down investigation time.
copilot-docs - Documentation for GitHub Copilot
aws-junit5 - JUnit 5 extensions for AWS
libfuzzer-workshop - Repository for materials of "Modern fuzzing of C/C++ Projects" workshop.
console-captor - 🎯 ConsoleCaptor captures console output for unit and integration testing purposes
PIT - State of the art mutation testing system for the JVM