assertEquals(2, protocolHelper.getWebProtocols().length);
        assertEquals(3, protocolHelper.getFileProtocols().length);
    }

    public void test_loadProtocols() {
        final ProtocolHelper protocolHelper = new ProtocolHelper();
        protocolHelper.loadProtocols("org.codelibs.fess.test.net.protocol");

        assertEquals(1, protocolHelper.getWebProtocols().length);

   */
  static @Nullable Object[] copyAsObjectArray(@Nullable Object[] elements, int offset, int length) {
    checkPositionIndexes(offset, offset + length, elements.length);
    if (length == 0) {
      return new Object[0];
    }
    @Nullable Object[] result = new Object[length];
    arraycopy(elements, offset, result, 0, length);
    return result;
  }

  @CanIgnoreReturnValue

    int maxSuffixLength = min(a.length(), b.length());
    int s = 0;
    while (s < maxSuffixLength && a.charAt(a.length() - s - 1) == b.charAt(b.length() - s - 1)) {
      s++;
    }
    if (validSurrogatePairAt(a, a.length() - s - 1)
        || validSurrogatePairAt(b, b.length() - s - 1)) {
      s--;
    }
    return a.subSequence(a.length() - s, a.length()).toString();
  }

  /**

   */
  public static char[] concat(char[]... arrays) {
    long length = 0;
    for (char[] array : arrays) {
      length += array.length;
    }
    char[] result = new char[checkNoOverflow(length)];
    int pos = 0;
    for (char[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

   */
  public static float[] concat(float[]... arrays) {
    long length = 0;
    for (float[] array : arrays) {
      length += array.length;
    }
    float[] result = new float[checkNoOverflow(length)];
    int pos = 0;
    for (float[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

   */
  public static double[] concat(double[]... arrays) {
    long length = 0;
    for (double[] array : arrays) {
      length += array.length;
    }
    double[] result = new double[checkNoOverflow(length)];
    int pos = 0;
    for (double[] array : arrays) {
      System.arraycopy(array, 0, result, pos, array.length);
      pos += array.length;
    }
    return result;
  }

        String[] results = relatedQueryHelper.getRelatedQueries("java");
        assertEquals(2, results.length);
        assertEquals("programming", results[0]);
        assertEquals("tutorial", results[1]);

        results = relatedQueryHelper.getRelatedQueries("python");
        assertEquals(2, results.length);
        assertEquals("scripting", results[0]);
        assertEquals("data science", results[1]);
    }

    }

    // Test default values
    public void test_defaultValues() throws Exception {
        assertEquals("Default message should match", "{org.lastaflute.validator.constraints.UriType.message}", getDefaultMessage());
        assertEquals("Default groups should be empty", 0, getDefaultGroups().length);

    checkArgument(
        string.length() >= 2, "input string (%s) must have at least 2 characters", string);
    checkArgument(
        string.length() % 2 == 0,
        "input string (%s) must have an even number of characters",
        string);

    byte[] bytes = new byte[string.length() / 2];
    for (int i = 0; i < string.length(); i += 2) {
      int ch1 = decode(string.charAt(i)) << 4;

        String[] result = JvmUtil.filterJvmOptions(new String[0]);
        assertEquals(0, result.length);
    }

    public void test_filterJvmOptions_singleElement() {
        System.setProperty("java.version", "11.0.1");

        String[] result = JvmUtil.filterJvmOptions(new String[] { "-Xmx1g" });
        assertEquals(1, result.length);
        assertEquals("-Xmx1g", result[0]);