*
   * @param expectedCrc the expected crc value.
   * @param data the data to run the checksum on.
   */
  private static void assertCrc(int expectedCrc, byte[] data) {
    int actualCrc = crc32c().hashBytes(data).asInt();
    assertEquals(
        String.format("expected: %08x, actual: %08x", expectedCrc, actualCrc),
        expectedCrc,
        actualCrc);

        // Setup
        FessUserBean user = FessUserBean.empty();
        String expectedUrl = "https://example.com/logout?user=testuser123";
        authenticator.setLogoutUrl(expectedUrl);

        // Execute
        String result = authenticator.logout(user);

        // Verify
        assertNotNull(result);
        assertEquals(expectedUrl, result);
        assertEquals(user, authenticator.getLastLogoutUser());
    }