*
   * @param string a string reference to check
   * @return {@code true} if the string is null or is the empty string
   */
  public static boolean isNullOrEmpty(@CheckForNull String string) {
    return Platform.stringIsNullOrEmpty(string);
  }

  /**
   * Returns a string, of length at least {@code minLength}, consisting of {@code string} prepended

   *
   * @param string a string reference to check
   * @return {@code true} if the string is null or is the empty string
   */
  public static boolean isNullOrEmpty(@CheckForNull String string) {
    return Platform.stringIsNullOrEmpty(string);
  }

  /**
   * Returns a string, of length at least {@code minLength}, consisting of {@code string} prepended

  }

  public void testToStringHelperWithArrays() {
    String[] strings = {"hello", "world"};
    int[] ints = {2, 42};
    Object[] objects = {"obj"};
    String[] arrayWithNull = {null};
    Object[] empty = {};
    String toTest =
        MoreObjects.toStringHelper("TSH")
            .add("strings", strings)
            .add("ints", ints)
            .add("objects", objects)

  private static final String DELTA = "\u0394";

  /** A domain part which is valid under lenient validation, but invalid under strict validation. */
  static final String LOTS_OF_DELTAS = Strings.repeat(DELTA, 62);

  private static final String ALMOST_TOO_MANY_LEVELS = Strings.repeat("a.", 127);

  private static final String ALMOST_TOO_LONG = Strings.repeat("aaaaa.", 40) + "1234567890.c";

    assertNull(Strings.emptyToNull(null));
    assertNull(Strings.emptyToNull(""));
    assertEquals("a", Strings.emptyToNull("a"));
  }

  public void testIsNullOrEmpty() {
    assertTrue(Strings.isNullOrEmpty(null));
    assertTrue(Strings.isNullOrEmpty(""));
    assertFalse(Strings.isNullOrEmpty("a"));
  }

  public void testPadStart_noPadding() {
    assertSame("", Strings.padStart("", 0, '-'));

  }

  public void testSubSetExclusiveExclusive() {
    String[] strings = NUMBER_NAMES.toArray(new String[0]);
    ImmutableSortedSet<String> set = ImmutableSortedSet.copyOf(strings);
    Arrays.sort(strings);
    for (int i = 0; i < strings.length; i++) {
      for (int j = i; j < strings.length; j++) {
        assertThat(set.subSet(strings[i], false, strings[j], false))

   * Comparisons between the two should take this into account.
   *
   * <p>Fingerprint2011() is a form of Murmur2 on strings up to 32 bytes and a form of CityHash for
   * longer strings. It could have been one or the other throughout. The main advantage of the
   * combination is that CityHash has a bunch of special cases for short strings that don't need to
   * be replicated here. The result will never be 0 or 1.
   *

  }

  public void testToStringHelperWithArrays() {
    String[] strings = {"hello", "world"};
    int[] ints = {2, 42};
    Object[] objects = {"obj"};
    String[] arrayWithNull = {null};
    Object[] empty = {};
    String toTest =
        MoreObjects.toStringHelper("TSH")
            .add("strings", strings)
            .add("ints", ints)
            .add("objects", objects)

 *
 * <p>As with {@link Preconditions}, {@code Verify} uses {@link Strings#lenientFormat} to format
 * error message template strings. This only supports the {@code "%s"} specifier, not the full range
 * of {@link java.util.Formatter} specifiers. However, note that if the number of arguments does not
 * match the number of occurrences of {@code "%s"} in the format string, {@code Verify} will still

 * @author Martin Buchholz
 * @author Clément Roux
 */
@GwtCompatible(emulated = true)
public class Utf8Test extends TestCase {

  private static final ImmutableList<String> ILL_FORMED_STRINGS;

  static {
    ImmutableList.Builder<String> builder = ImmutableList.builder();
    char[] surrogates = {
      MAX_LOW_SURROGATE, MAX_HIGH_SURROGATE, MIN_LOW_SURROGATE, MIN_HIGH_SURROGATE,
    };