impl TestCaseFilter for TestsFilter {
    fn should_be_run(&self, test_case: &TestCaseRunnable) -> bool {
        match self.ignored_filter {
            IgnoredFilter::All => true,
            IgnoredFilter::Ignored => {
                assert!(test_case.ignored); // we filter all not ignored test before
                true
            }
            IgnoredFilter::NotIgnored => !test_case.ignored,
        }
    }
}