Maven Surefire Plugin
The Maven Surefire Plugin is primarily used for executing unit tests. These tests are typically quick to run and do not require integration environment components such as databases or network servers. The Surefire Plugin executes by default during the Maven test phase, meaning it is part of the Maven lifecycle and runs automatically during the build process.
Example: When you run mvn test or mvn package, the Surefire Plugin automatically executes these tests. If the tests pass, the build continues; if any tests fail, the build fails.
Maven Failsafe Plugin
The Maven Failsafe Plugin is primarily used for executing integration tests. Integration tests are typically more complex than unit tests and may involve interactions between the application and databases, networks, or other external systems. The Failsafe Plugin is designed to execute during later phases of the Maven lifecycle, specifically the integration-test and verify phases.
A key feature of the Failsafe Plugin is that it does not immediately fail the build when tests fail; instead, it allows all tests to run and checks the test results during the verify phase to determine if the build succeeds. This enables developers to view the results of all integration tests rather than stopping at the first test failure.
Example: If your project includes tests requiring connection to a real database or calling external APIs, you can use the Failsafe Plugin to execute these tests. You can initiate these tests by configuring the mvn verify command; the Failsafe Plugin runs the tests during the integration-test phase and evaluates the test results during the verify phase.
Summary
In summary, the Surefire Plugin is used for unit tests, typically executed frequently during early development stages, while the Failsafe Plugin is used for integration tests, typically executed in later stages before release. Using both plugins ensures automated unit and integration testing within the codebase, helping to improve software quality and stability.