assertFalse(SsoResponseType.METADATA.equals(null));
        assertFalse(SsoResponseType.METADATA.equals("METADATA"));
    }

    @Test
    public void test_hashCode() {
        // Test hashCode consistency
        int metadataHashCode = SsoResponseType.METADATA.hashCode();
        int logoutHashCode = SsoResponseType.LOGOUT.hashCode();

        // Test that toString returns a non-null value
        String result = crawlerEngineClient.toString();
        assertNotNull(result);
    }

    // Test hashCode method
    @Test
    public void test_hashCode() {
        // Test that hashCode returns consistent value
        int hashCode1 = crawlerEngineClient.hashCode();
        int hashCode2 = crawlerEngineClient.hashCode();
        assertEquals(hashCode1, hashCode2);

        assertNotSame(exception1, exception2);
        assertFalse(exception1.equals(exception2));
        assertTrue(exception1.equals(exception1));
    }

    @Test
    public void test_hashCode() {
        // Test hashCode consistency
        DictionaryExpiredException exception = new DictionaryExpiredException();
        int hashCode1 = exception.hashCode();
        int hashCode2 = exception.hashCode();