cache.putAll(ImmutableMap.of(10, 20, 30, 50, 60, 90));

    assertEquals(Integer.valueOf(20), cache.getIfPresent(10));
    assertEquals(Integer.valueOf(50), cache.getIfPresent(30));
    assertEquals(Integer.valueOf(90), cache.getIfPresent(60));

    cache.asMap().putAll(ImmutableMap.of(10, 50, 30, 20, 60, 70, 5, 5));

    assertEquals(Integer.valueOf(50), cache.getIfPresent(10));

    cache.putAll(ImmutableMap.of(10, 20, 30, 50, 60, 90));

    assertEquals(Integer.valueOf(20), cache.getIfPresent(10));
    assertEquals(Integer.valueOf(50), cache.getIfPresent(30));
    assertEquals(Integer.valueOf(90), cache.getIfPresent(60));

    cache.asMap().putAll(ImmutableMap.of(10, 50, 30, 20, 60, 70, 5, 5));

    assertEquals(Integer.valueOf(50), cache.getIfPresent(10));

    CacheStats sum = two.plus(one);
    assertEquals(124, sum.requestCount());
    assertEquals(64, sum.hitCount());
    assertEquals(64.0 / 124, sum.hitRate());
    assertEquals(60, sum.missCount());
    assertEquals(60.0 / 124, sum.missRate());
    assertEquals(56, sum.loadSuccessCount());
    assertEquals(52, sum.loadExceptionCount());
    assertEquals(52.0 / 108, sum.loadExceptionRate());

    stopwatch.start();
    ticker.advance((long) (1.5 * 60 * 1000000000L));
    assertEquals("1.500 min", stopwatch.toString());
    stopwatch.reset();
    stopwatch.start();
    ticker.advance((long) (2.5 * 60 * 60 * 1000000000L));
    assertEquals("2.500 h", stopwatch.toString());
    stopwatch.reset();
    stopwatch.start();
    ticker.advance((long) (7.25 * 24 * 60 * 60 * 1000000000L));

    stopwatch.start();
    ticker.advance((long) (1.5 * 60 * 1000000000L));
    assertEquals("1.500 min", stopwatch.toString());
    stopwatch.reset();
    stopwatch.start();
    ticker.advance((long) (2.5 * 60 * 60 * 1000000000L));
    assertEquals("2.500 h", stopwatch.toString());
    stopwatch.reset();
    stopwatch.start();
    ticker.advance((long) (7.25 * 24 * 60 * 60 * 1000000000L));

    return MoreObjects.firstNonNull(keyEquivalence, getKeyStrength().defaultEquivalence());
  }

  /**
   * Sets the minimum total size for the internal hash tables. For example, if the initial capacity
   * is {@code 60}, and the concurrency level is {@code 8}, then eight segments are created, each
   * having a hash table of size eight. Providing a large enough estimate at construction time

    verifyTableSize(100, 2, 4);
    verifyTableSize(100, 5, 8);
    verifyTableSize(100, 33, 64);
    verifyTableSize(60, 60, 128);
    verifyTableSize(120, 60, 256);
    // if the table is only double the necessary size, we don't bother resizing it
    verifyTableSize(180, 60, 128);
    // but if it's even bigger than double, we rebuild the table
    verifyTableSize(17, 17, 32);
    verifyTableSize(17, 16, 32);

    CacheStats sum = two.plus(one);
    assertEquals(124, sum.requestCount());
    assertEquals(64, sum.hitCount());
    assertEquals(64.0 / 124, sum.hitRate());
    assertEquals(60, sum.missCount());
    assertEquals(60.0 / 124, sum.missRate());
    assertEquals(56, sum.loadSuccessCount());
    assertEquals(52, sum.loadExceptionCount());
    assertEquals(52.0 / 108, sum.loadExceptionRate());

    return MoreObjects.firstNonNull(valueEquivalence, getValueStrength().defaultEquivalence());
  }

  /**
   * Sets the minimum total size for the internal hash tables. For example, if the initial capacity
   * is {@code 60}, and the concurrency level is {@code 8}, then eight segments are created, each
   * having a hash table of size eight. Providing a large enough estimate at construction time

    testEncodesWithOffset(base64(), "foobar", 4, 0, "");
  }

  public void testBase64Url() {
    testDecodesByBytes(base64Url(), "_zzz", new byte[] {-1, 60, -13});
    testDecodesByBytes(base64Url(), "-zzz", new byte[] {-5, 60, -13});
  }

  public void testBase64UrlInvalidDecodings() {
    assertFailsToDecode(base64Url(), "+zzz", "Unrecognized character: +");