Reports malformed @Rule or @ClassRule annotation usages. Tests with malformed rules cannot be run.

A @Rule annotated member must be public and a subtype of org.junit.rules.TestRule or org.junit.rules.MethodRule
A @ClassRule annotated member must be public and static and a subtype of org.junit.rules.TestRule

For example:


  public class MomentousTest {
    @Rule
    private final TemporaryFolder tempFolder =
      new TemporaryFolder();

    // ... tests go here
  }

A quick fix is provided to fix the modifiers:


  public class MomentousTest {
    @Rule
    public final TemporaryFolder tempFolder =
      new TemporaryFolder();

    // ... tests go here
  }