assertTrue(len4.matches('c'));
    assertTrue(len4.matches('d'));
    for (char c = 'e'; c < 'z'; c++) {
      assertFalse(len4.matches(c));
    }

    Random rand = new Random(1234);
    for (int testCase = 0; testCase < 100; testCase++) {
      char[] chars = randomChars(rand, rand.nextInt(63) + 1);
      CharMatcher m = SmallCharMatcher.from(bitSet(chars), new String(chars));

    assertTrue(len4.matches('c'));
    assertTrue(len4.matches('d'));
    for (char c = 'e'; c < 'z'; c++) {
      assertFalse(len4.matches(c));
    }

    Random rand = new Random(1234);
    for (int testCase = 0; testCase < 100; testCase++) {
      char[] chars = randomChars(rand, rand.nextInt(63) + 1);
      CharMatcher m = SmallCharMatcher.from(bitSet(chars), new String(chars));

        .addEqualityGroup(new PairedStats(MANY_VALUES_STATS_ITERABLE, ONE_VALUE_STATS, 1.23))
        .addEqualityGroup(
            new PairedStats(MANY_VALUES_STATS_ITERABLE, MANY_VALUES_STATS_ITERABLE, 1.234))
        .testEquals();
  }

  public void testSerializable() {
    SerializableTester.reserializeAndAssert(MANY_VALUES_PAIRED_STATS);
  }

  public void testToString() {

        .addEqualityGroup(new PairedStats(MANY_VALUES_STATS_ITERABLE, ONE_VALUE_STATS, 1.23))
        .addEqualityGroup(
            new PairedStats(MANY_VALUES_STATS_ITERABLE, MANY_VALUES_STATS_ITERABLE, 1.234))
        .testEquals();
  }

  public void testSerializable() {
    SerializableTester.reserializeAndAssert(MANY_VALUES_PAIRED_STATS);
  }

  public void testToString() {

 */
@SuppressWarnings("deprecation") // tests of deprecated method
public class CacheExpirationTest extends TestCase {

  private static final long EXPIRING_TIME = 1000;
  private static final int VALUE_PREFIX = 12345;
  private static final String KEY_PREFIX = "key prefix:";

  public void testExpiration_expireAfterWrite() {
    FakeTicker ticker = new FakeTicker();

          "abc.a23",
          "biz.com.ua",
          "x",
          "fOo",
          "f--o",
          "f_a",
          "foo.net.us\uFF61ocm",
          "woo.com.",
          "8server.shop",
          "123.cn",
          "a" + DELTA + "b.com",
          ALMOST_TOO_MANY_LEVELS,
          ALMOST_TOO_LONG);

  private static final ImmutableSet<String> INVALID_NAME =
      ImmutableSet.of(
          "",
          " ",

    // This sentence just isn't base64() encoded.
    assertFailsToDecode(base64(), "let's not talk of love or chains!");
    // A 4n+1 length string is never legal base64().
    assertFailsToDecode(base64(), "12345", "Invalid input length 5");
    // These have a combination of invalid length, unrecognized characters and wrong padding.
    assertFailsToDecode(base64(), "AB=C", "Unrecognized character: =");

  // Inputs and their statistics:

  static final double ONE_VALUE = 12.34;

  static final double OTHER_ONE_VALUE = -56.78;

  static final ImmutableList<Double> TWO_VALUES = ImmutableList.of(12.34, -56.78);
  static final double TWO_VALUES_MEAN = (12.34 - 56.78) / 2;
  static final double TWO_VALUES_SUM_OF_SQUARES_OF_DELTAS =
      (12.34 - TWO_VALUES_MEAN) * (12.34 - TWO_VALUES_MEAN)

      }
      return false;
    }

    @Override
    public int hashCode() {
      return Arrays.hashCode(chars) + (ignoreCase ? 1231 : 1237);
    }
  }

  private static class StandardBaseEncoding extends BaseEncoding {
    final Alphabet alphabet;

    @CheckForNull final Character paddingChar;

 */
@SuppressWarnings("deprecation") // tests of deprecated method
public class CacheExpirationTest extends TestCase {

  private static final long EXPIRING_TIME = 1000;
  private static final int VALUE_PREFIX = 12345;
  private static final String KEY_PREFIX = "key prefix:";

  public void testExpiration_expireAfterWrite() {
    FakeTicker ticker = new FakeTicker();