assertEquals("foobar", Ascii.toLowerCase("fOobaR"));
  }

  public void testToUpperCase() {
    assertEquals(UPPER, Ascii.toUpperCase(LOWER));
    assertSame(UPPER, Ascii.toUpperCase(UPPER));
    assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
    assertEquals("FOOBAR", Ascii.toUpperCase("FoOBAr"));
  }

  public void testCharsIgnored() {
    for (char c : IGNORED.toCharArray()) {
      String str = String.valueOf(c);

    assertEquals("foobar", Ascii.toLowerCase("fOobaR"));
  }

  public void testToUpperCase() {
    assertEquals(UPPER, Ascii.toUpperCase(LOWER));
    assertSame(UPPER, Ascii.toUpperCase(UPPER));
    assertEquals(IGNORED, Ascii.toUpperCase(IGNORED));
    assertEquals("FOOBAR", Ascii.toUpperCase("FoOBAr"));
  }

  public void testCharsIgnored() {
    for (char c : IGNORED.toCharArray()) {
      String str = String.valueOf(c);

    @Override
    String convert(CaseFormat format, String s) {
      if (format == LOWER_UNDERSCORE) {
        return s.replace('-', '_');
      }
      if (format == UPPER_UNDERSCORE) {
        return Ascii.toUpperCase(s.replace('-', '_'));
      }
      return super.convert(format, s);
    }
  },

  /** C++ variable naming convention, e.g., "lower_underscore". */
  LOWER_UNDERSCORE(CharMatcher.is('_'), "_") {
    @Override

    @Override
    String convert(CaseFormat format, String s) {
      if (format == LOWER_UNDERSCORE) {
        return s.replace('-', '_');
      }
      if (format == UPPER_UNDERSCORE) {
        return Ascii.toUpperCase(s.replace('-', '_'));
      }
      return super.convert(format, s);
    }
  },

  /** C++ variable naming convention, e.g., "lower_underscore". */
  LOWER_UNDERSCORE(CharMatcher.is('_'), "_") {
    @Override

   * without modification.
   *
   * @since 14.0
   */
  public static String toUpperCase(CharSequence chars) {
    if (chars instanceof String) {
      return toUpperCase((String) chars);
    }
    char[] newChars = new char[chars.length()];
    for (int i = 0; i < newChars.length; i++) {
      newChars[i] = toUpperCase(chars.charAt(i));
    }
    return String.valueOf(newChars);
  }

  /**

   * without modification.
   *
   * @since 14.0
   */
  public static String toUpperCase(CharSequence chars) {
    if (chars instanceof String) {
      return toUpperCase((String) chars);
    }
    char[] newChars = new char[chars.length()];
    for (int i = 0; i < newChars.length; i++) {
      newChars[i] = toUpperCase(chars.charAt(i));
    }
    return String.valueOf(newChars);
  }

  /**

 * limitations under the License.
 */

package gradlebuild.basics

import java.util.Locale

fun String.toLowerCase(): String =
    lowercase(Locale.US)

fun String.toUpperCase(): String =
    uppercase(Locale.US)

fun String.capitalize(): String =
    replaceFirstChar { it.uppercase(Locale.US) }

fun String.decapitalize(): String =

                    buf.append('_');
                }
                buf.append(s.substring(pos, i).toUpperCase());
                pos = i;
            }
        }
        if (buf.length() != 0) {
            buf.append('_');
        }
        buf.append(s.substring(pos, s.length()).toUpperCase());
        return buf.toString();
    }

    /**
     * 文字列が数値のみで構成されているかどうかを返します。
     *

                    if (resources.containsKey(key)) {
                        queryMap.put(key, value);
                    } else {
                        queryMap.put(fileType.toUpperCase(Locale.ROOT), value);
                    }
                }
            }
            queryMap.remove("labels.facet_filetype_others");
            queryMap.put("labels.facet_filetype_others", "filetype:others");

  public void testMap() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.map(
                    Arrays.spliterator(new String[] {"a", "b", "c", "d", "e"}), Ascii::toUpperCase))
        .expect("A", "B", "C", "D", "E");
  }

  public void testFlatMap() {
    SpliteratorTester.of(
            () ->
                CollectSpliterators.flatMap(