// While not guaranteed, typically enum hashCodes are different
        assertTrue(hashCodes.size() > 1);
    }

    /**
     * Test compareTo method
     */
    public void test_compareTo() {
        // Compare with self
        assertEquals(0, CrawlerStatus.INITIALIZING.compareTo(CrawlerStatus.INITIALIZING));
        assertEquals(0, CrawlerStatus.RUNNING.compareTo(CrawlerStatus.RUNNING));

    verifyScenario(starter, 0);
  }

  private static <T extends @Nullable Object> void verifyScenario(Scenario<T> scenario, int level) {
    scenario.testCompareTo();
    scenario.testIsOrdered();
    scenario.testMinAndMax();
    scenario.testBinarySearch();
    scenario.testSortedCopy();

    if (level < RECURSE_DEPTH) {

    verifyScenario(starter, 0);
  }

  private static <T extends @Nullable Object> void verifyScenario(Scenario<T> scenario, int level) {
    scenario.testCompareTo();
    scenario.testIsOrdered();
    scenario.testMinAndMax();
    scenario.testBinarySearch();
    scenario.testSortedCopy();

    if (level < RECURSE_DEPTH) {