@Ignore is one of the useful annotations of JUnit 4 and above. If you put this in front of a test method it will be ignored and the test results show that the test was not run but ignored or skipped.
Tests run: 7, Failures: 0, Errors: 0, Skipped: 1, Time elapsed: 0.052 sec
But sometimes you want to decide during runtime if a test should be ignored. For example if a database is not available, you don’t want to run a test which depends on the database. The annotation doesn’t help here. You would need to set it manually. Wrapping an if-check for the database around the method body will help you to avoid a test failure. But it will show the test passed, lulling you into a false sense of security.
What you really want is an ignored test. That’s where Assume helps:
“A set of methods useful for stating assumptions about the conditions in which a test is meaningful. A failed assumption does not mean the code is broken, but that the test provides no useful information. The default JUnit runner treats tests with failing assumptions as ignored.”
Unfortunately most of the test runners I use (Intellij Idea 7.0 and Maven 2.0.8) don’t show it as ignored but as passed. Hopefully it is just a matter of time until it is fixed there as well.