Most popular Mocking framework for unit tests written in Java

Available as part of the Tidelift Subscription. The maintainers of org.mockito:mockito-core and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more. Still on Mockito 1.x? See what's new in Mockito 2! Mockito 3 does not introduce any breaking API changes, but now requires Java 8 over Java 6 for Mockito 2. Mockito 4 removes deprecated API. 

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead and flakiness of an emulator. Robolectric tests routinely run 10x faster than those on cold-started emulators. Robolectric supports running unit tests for 16 different versions of Android, ranging from Jelly Bean (API level 16) to SV2 (API level 32). 

PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

Please, read the guideline for a new contributor before start. 

A Java architecture test library, to specify and assert architecture rules in plain Java

ArchUnit is a free, simple and extensible library for checking the architecture of your Java code. That is, ArchUnit can check dependencies between packages and classes, layers and slices, check for cyclic dependencies and more. It does so by analyzing given Java bytecode, importing all classes into a Java code structure. ArchUnit's main focus is to automatically test architecture and coding rules, using any plain Java unit testing framework. 

EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hashCode methods is met.

EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hashCode methods in a class is met. The Maven coordinates are:. Note that there's also a 'fat' jar with no transitive dependencies with artifactId equalsverifier-nodep. 

A collection of small exercises in the form of unit tests, designed to get Java developers up to speed on Groovy

Webtau (short for 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, Graph QL, Browser, Database, CLI and Business Logic with consistent set of matchers and concepts. REPL mode speeds-up tests development. Rich reporting cuts down investigation time.

Web Test Automation User Guide. Webtau (Web Test automation) - concise and expressive way to write end-to-end and unit tests. REST API GraphQL API Web UI CLI Database Business Logic (JVM only) Full User Guide Multiple layers testing example blog 

🎯  LogCaptor captures log entries for unit testing purposes

Hey, hello there 👋 Welcome, you are  I hope you will like this library ❤️. LogCaptor is a library which will enable you to easily capture logging entries for unit testing purposes. Do you want to capture the console output? Please have a look at ConsoleCaptor. 

A demo of using robolectric to do unit testing

All source code examples in the repository are for my Online Course - Testing Spring Beginner to Guru. This source code repository contains JUnit 5 and Mockito test examples with Maven. 