Add validation check that @ClassRule can only return an implementation of TestRule #1019
Description
Presently @ClassRule can be an implementation of TestRule or MethodRule but it does not make sense to allow MethodRule. So as per discussion on #1016 with @kcooney creating this issue.
// should fail validation as @ClassRule should only allow implementation of `TestRule` but passes
public class ClassRuleTest {
@ClassRule
public static MethodRule methodRule() {
return new MethodRule() {
@Override
public Statement apply(Statement base, FrameworkMethod method, Object target) {
return base;
}
};
}
@Test
public void doNothing() {
}
}