@DisplayName("Should convert integer to hex string with padding")
    void testIntToHexString() {
        // Test various integer values
        assertEquals("00000000", Hexdump.toHexString(0, 8));
        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00001000", Hexdump.toHexString(4096, 8));
        assertEquals("FFFFFFFF", Hexdump.toHexString(-1, 8));

        // Test different sizes

        assertEquals("0000", Hexdump.toHexString(0, 4));
        assertEquals("00", Hexdump.toHexString(0, 2));

        // Test positive values
        assertEquals("000000FF", Hexdump.toHexString(255, 8));
        assertEquals("00FF", Hexdump.toHexString(255, 4));
        assertEquals("FF", Hexdump.toHexString(255, 2));

        // Test larger values

   * are the "next" pointer (pointing to the next entry in the bucket chain), which will always be
   * less than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *
   * <p>The pointers in [size(), entries.length) are all "null" (UNSET).
   */
  private transient int @Nullable [] entries;

  /**

    assertThat(converter.convert("0xff")).isEqualTo(255);
    assertThat(converter.convert("0xFF")).isEqualTo(255);
    assertThat(converter.convert("-0xFF")).isEqualTo(-255);
    assertThat(converter.convert("#0000FF")).isEqualTo(255);
    assertThat(converter.convert("0666")).isEqualTo(438);
  }

  public void testStringConverter_convertError() {

   * the "next" pointer (pointing to the next entry in the bucket chain), which will always be less
   * than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *
   * <p>The pointers in [size(), entries.length) are all "null" (UNSET).
   */
  @VisibleForTesting transient int @Nullable [] entries;

   * the "next" pointer (pointing to the next entry in the bucket chain), which will always be less
   * than or equal to the hashtable mask.
   *
   * <pre>
   * hash  = aaaaaaaa
   * mask  = 00000fff
   * next  = 00000bbb
   * entry = aaaaabbb
   * </pre>
   *
   * <p>The pointers in [size(), entries.length) are all "null" (UNSET).
   */
  @VisibleForTesting transient int @Nullable [] entries;

    assertThat(converter.convert("0xff")).isEqualTo(255L);
    assertThat(converter.convert("0xFF")).isEqualTo(255L);
    assertThat(converter.convert("-0xFF")).isEqualTo(-255L);
    assertThat(converter.convert("#0000FF")).isEqualTo(255L);
    assertThat(converter.convert("0666")).isEqualTo(438L);
  }

  public void testStringConverter_convertError() {

    assertThat(converter.convert("0xff")).isEqualTo(255);
    assertThat(converter.convert("0xFF")).isEqualTo(255);
    assertThat(converter.convert("-0xFF")).isEqualTo(-255);
    assertThat(converter.convert("#0000FF")).isEqualTo(255);
    assertThat(converter.convert("0666")).isEqualTo(438);
  }

  public void testStringConverter_convertError() {

    assertThat(converter.convert("0xff")).isEqualTo(255);
    assertThat(converter.convert("0xFF")).isEqualTo(255);
    assertThat(converter.convert("-0xFF")).isEqualTo(-255);
    assertThat(converter.convert("#0000FF")).isEqualTo(255);
    assertThat(converter.convert("0666")).isEqualTo(438);
  }

  public void testStringConverter_convertError() {