@ValueSource(strings = { "", "a", "short", "medium length text", "very long text that exceeds typical block sizes" })
    @DisplayName("Should handle various input sizes for hashing")
    void testHashVariousInputSizes(String input) {
        // Given
        byte[] data = input.getBytes();

        // When
        MessageDigest md4 = Crypto.getMD4();
        MessageDigest md5 = Crypto.getMD5();

                generator.saveImage(input, outputFile);
            }
            assertImageSize(outputFile, 100, 100);

            imagePath = "thumbnail/400x400.gif";
            try (ImageInputStream input = ImageIO.createImageInputStream(classLoader.getResourceAsStream(imagePath))) {
                generator.saveImage(input, outputFile);

    public void test_constructor_withValidInputs() {
        CharMappingItem item = new CharMappingItem(1L, new String[] { "input" }, "output");

        // Test basic properties that exist
        assertNotNull(item.getInputs());
        assertEquals(1, item.getInputs().length);
        assertEquals("input", item.getInputs()[0]);
        assertEquals("output", item.getOutput());
    }

    public void test_constructor_withIdZero() {

        String input;
        String result;

        // Empty string
        input = "";
        result = KuromojiCSVUtil.quoteEscape(input);
        assertEquals("", result);

        // Only quotes
        input = "\"\"";
        result = KuromojiCSVUtil.quoteEscape(input);
        assertEquals("\"\"\"\"", result);

        // Only commas
        input = ",,,";

      chunk = max(1, min(chunk, input.length()));
      assertEquals(expectProcess, bufferHelper(input, chunk));
      assertEquals(expectRead, readUsingJava(input, chunk));
      assertEquals(expectRead, readUsingReader(input, chunk, true));
      assertEquals(expectRead, readUsingReader(input, chunk, false));
    }
  }

  private static List<String> bufferHelper(String input, int chunk) throws IOException {

      chunk = max(1, min(chunk, input.length()));
      assertEquals(expectProcess, bufferHelper(input, chunk));
      assertEquals(expectRead, readUsingJava(input, chunk));
      assertEquals(expectRead, readUsingReader(input, chunk, true));
      assertEquals(expectRead, readUsingReader(input, chunk, false));
    }
  }

  private static List<String> bufferHelper(String input, int chunk) throws IOException {

  private static void testReverse(double[] input, double[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Doubles.reverse(input);
    assertThat(input).isEqualTo(expectedOutput);
  }

  private static void testReverse(
      double[] input, int fromIndex, int toIndex, double[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Doubles.reverse(input, fromIndex, toIndex);

        ;
    }

    @ParameterizedTest(name = "encode({1}) -> {2}")
    @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");
    }

    /**

      if (compress != -1) return null // Multiple "::" delimiters.
      i += 2
      b += 2
      compress = b
      if (i == limit) break
    } else if (b != 0) {
      // Group separator ":" delimiter.
      if (input.startsWith(":", startIndex = i)) {
        i++
      } else if (input.startsWith(".", startIndex = i)) {

  private static void testReverse(float[] input, float[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Floats.reverse(input);
    assertThat(input).isEqualTo(expectedOutput);
  }

  private static void testReverse(
      float[] input, int fromIndex, int toIndex, float[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Floats.reverse(input, fromIndex, toIndex);