*
     * @param values the array of JVM options to filter
     * @return the filtered array of JVM options applicable to the current Java version
     */
    public static String[] filterJvmOptions(final String[] values) {
        final int version = getJavaVersion();
        return Arrays.stream(values).map(s -> {
            final Matcher matcher = VERSION_PREFIX_PATTERN.matcher(s);

    @MethodSource("encodeProvider")
    void testEncode(byte[] input, String expected) {
        // Arrange & Act
        String actual = Base64.encode(input);
        // Assert
        assertEquals(expected, actual, "Base64.encode should match expected string");
    }

    /**
     * Data provider for Base64 strings and expected decoded byte arrays.
     */
    static Stream<Arguments> decodeProvider() {

    }

    @Test
    @DisplayName("Test service cleanup")
    public void testServiceCleanup() throws CIFSException {
        String sessionId1 = "cleanup-test-1";
        String sessionId2 = "cleanup-test-2";
        byte[] salt = preauthService.generatePreauthSalt();

        preauthService.initializeSession(sessionId1, salt, PreauthIntegrityService.HASH_ALGO_SHA512);

     */
    public CachedCipher() {
    }

    private static final String BLOWFISH = "Blowfish";

    private static final String RSA = "RSA";

    /**
     * The algorithm to use for the cipher.
     */
    protected String algorithm = BLOWFISH;

    /**
     * The transformation to use for the cipher.
     */
    protected String transformation = RSA;

    /**
     * The key to use for encryption/decryption.

     * @param timestamp The last modified timestamp of the file.
     */
    public SynonymFile(final String id, final String path, final Date timestamp) {
        super(id, path, timestamp);
    }

    @Override
    public String getType() {
        return SYNONYM;
    }

    @Override
    public String getPath() {
        return path;
    }

    @Override

}

func getResourceKey(name MetricName, labels map[string]string) string {
	// labels are used to uniquely identify a metric
	// e.g. reads_per_sec_{drive} inside the map
	sfx := ""
	for _, v := range labels {
		if len(sfx) > 0 {
			sfx += "_"
		}
		sfx += v
	}

	return string(name) + "_" + sfx
}

        if (crudMode != expectedMode) {
            throwValidationError(messages -> {
                messages.addErrorsCrudInvalidMode(GLOBAL, String.valueOf(expectedMode), String.valueOf(crudMode));
            }, this::asListHtml);
        }
    }

    // ===================================================================================

        // Test default empty when no env var is set
        String originalAppType = System.getenv("FESS_APP_TYPE");

        // Since we can't modify environment variables directly,
        // we test the current behavior
        String appType = ResourceUtil.getAppType();
        assertNotNull(appType);
        // appType should be either empty string or the actual env value

                builder.startObject();
                builder.field("string", "test");
                builder.endObject();
                return builder;
            }
        };

        try {
            String result = SearchEngineUtil.getXContentString(xContent, XContentType.JSON);
            assertNotNull(result);
            assertTrue(result.contains("string"));
            assertTrue(result.contains("test"));

    }
  }

  private static class MutateTask implements Callable<int[]> {
    private final ConcurrentHashMultiset<String> multiset;
    private final ImmutableList<String> keys;
    private final Random random = new Random();

    private MutateTask(ConcurrentHashMultiset<String> multiset, ImmutableList<String> keys) {
      this.multiset = multiset;
      this.keys = keys;
    }

    @Override