Split up unit tests and integration tests in main module #122
Description
In the java-compiler-testing Maven module:
- Use the JUnit Platform Suite API to define runners with selectors for unit tests and integration tests.
- Instruct maven-surefire-plugin to only run the unit test suite.
- Include maven-failsafe-plugin in parent POM plugin management, and add to java-compiler-testing module.
- Configure failsafe to only run the integration test suite in the java-compiler-testing module.
- Configure JaCoCo to attach an agent to failsafe for integration tests.
- Configure JaCoCo to merge coverage reports for unit and integration tests.
- Ensure codecov in CI still picks up the same coverage.
Edit: looks like codecov has a nifty feature flag option we can use to help get coverage on unit tests and integration tests in PRs: