Due to a ransomware attack, the wiki was reverted to a July 2022 version. . We apologize for the lack of a more recent valid backup.
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Unit tests should be as short, fast and reliable as they can be. Every developer on the project will be running your tests, they should be easy to run and produce accurate results. Here are some key ways to write tests that are not brittle:
- Don't use Avoid using sleep() whenever possible, since it often leads to brittle tests. If you find that you have to wait for an event or wait for some work to be done by another thread, prefer latches or thread notifications to sleeps.
- Try to keep individual tests small, and only test one thing per test.
- Use mocking when you need to include a complicated service to satisfy dependencies. ONOS uses the EasyMock framework, version 3.2.
- Maven may choose to run multiple tests in the same Java virtual machine. If you use static variables in classes, be sure to reset them to known starting values before each test runs.
- Do not use local resources like files and IP Addresses in tests.
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