Mockito mock objects library core API and implementation

java, testing, mock, test-automation, mocking, mockito, testing-tools, mock-library, java-library, test-driven-development, mocks, mocking-framework



Most popular mocking framework for Java

Build Status Coverage Status MIT License

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Current version is 3.x

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 for enterprise

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Mockito continuously delivers improvements using Shipkit library ( See the latest release notes and latest documentation. Docs in are available 24h after release. Read also about semantic versioning in Mockito. Note: not every version is published to Maven Central.

Older 1.x and 2.x releases are available in Central Repository , Bintray and (documentation).

More information

All you want to know about Mockito is hosted at The Mockito Site which is Open Source and likes pull requests, too.

Want to contribute? Take a look at the Contributing Guide.

Enjoy Mockito!

Need help?

How to develop Mockito?

To build locally:

 ./gradlew build

To develop in IntelliJ IDEA you can use built-in Gradle import wizard in IDEA. Alternatively generate the importable IDEA metadata files using:

 ./gradlew idea

Then, open the generated *.ipr file in IDEA.

How to release new version?

Mockito implements Continuous Delivery model. Every change on main branch (for example merging a pull request) triggers a release build on Travis CI. The build publishes new version if specific criteria are met: all tests green, no 'ci skip release' used in commit message, see the build log for more information. Every new version is published to "mockito/maven" Bintray repository. New versions that Mockito team deems "notable" are additionally published to Maven Central and JCenter. We used to publish every version to Maven Central but we changed this strategy based on feedback from the community (#911).

  • Q: What's new in Mockito release model?

    A: In Q2 2017 we implemented Mockito Continuous Delivery Pipeline 2.0. Not every version is published to Maven Central.

  • Q: How to publish to Maven Central?

    A: Include "[ci maven-central-release]" in the merge commit when merging the PR. Hint: To signify a new feature consider updating version to next minor/major, like: "2.8.0", "2.9.0", "3.0.0".

  • Q: How to promote already released version to a notable version?

    A: It isn't automated at the moment. What's the use case?