* other.
   *
   * <p>The returned collection's {@code add()} and {@code addAll()} methods throw an {@link
   * UnsupportedOperationException}. All other collection methods are supported, as long as {@code
   * fromCollection} supports them.
   *
   * <p>The returned collection isn't threadsafe or serializable, even if {@code fromCollection} is.
   *

  public void testNullPointers() {
    NullPointerTester tester = new NullPointerTester();
    tester.setDefault(BigInteger.class, ONE);
    tester.setDefault(int.class, 1);
    tester.setDefault(long.class, 1L);
    tester.testAllPublicStaticMethods(BigIntegerMath.class);
  }

  @GwtIncompatible // String.format
  private static void failFormat(String template, Object... args) {

      return (o instanceof IntHolder) && ((IntHolder) o).value == value;
    }

    @Override
    public int hashCode() {
      return value;
    }

    private static final long serialVersionUID = 5;
  }

  public void testMutableValues() {
    IntHolder holderA = new IntHolder(1);
    IntHolder holderB = new IntHolder(2);

  public void testNullPointers() {
    NullPointerTester tester = new NullPointerTester();
    tester.setDefault(BigInteger.class, ONE);
    tester.setDefault(int.class, 1);
    tester.setDefault(long.class, 1L);
    tester.testAllPublicStaticMethods(BigIntegerMath.class);
  }

  @GwtIncompatible // String.format
  private static void failFormat(String template, Object... args) {

    SetFieldSettersHolder.EMPTY_SET_FIELD_SETTER.set(this, emptySet(valueComparator));
  }

  @GwtIncompatible // not needed in emulated source.
  @J2ktIncompatible
  private static final long serialVersionUID = 0;

        .isEqualTo(1);
    assertThat(
            Longs.indexOf(
                new long[] {(long) 2, (long) 3, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3},
                new long[] {(long) 2, (long) 3, (long) 4}))
        .isEqualTo(2);
    assertThat(
            Longs.indexOf(
                new long[] {(long) 2, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3, (long) 4},

        .isEqualTo(1);
    assertThat(
            Longs.indexOf(
                new long[] {(long) 2, (long) 3, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3},
                new long[] {(long) 2, (long) 3, (long) 4}))
        .isEqualTo(2);
    assertThat(
            Longs.indexOf(
                new long[] {(long) 2, (long) 2, (long) 3, (long) 4, (long) 2, (long) 3, (long) 4},

    testSort(new long[] {2}, 0, 1, new long[] {2});
    testSort(new long[] {2, 1, 0}, 0, 2, new long[] {1, 2, 0});
    testSort(new long[] {2, GREATEST, 1, LEAST}, 1, 4, new long[] {2, LEAST, 1, GREATEST});
  }

  public void testSortDescending() {
    testSortDescending(new long[] {}, new long[] {});
    testSortDescending(new long[] {1}, new long[] {1});
    testSortDescending(new long[] {1, 2}, new long[] {2, 1});

  public void testCheckedCast() {
    for (long value : UNSIGNED_INTS) {
      assertThat(UnsignedInts.toLong(UnsignedInts.checkedCast(value))).isEqualTo(value);
    }
    assertCastFails(1L << 32);
    assertCastFails(-1L);
    assertCastFails(Long.MAX_VALUE);
    assertCastFails(Long.MIN_VALUE);
  }

  private static void assertCastFails(long value) {
    try {
      UnsignedInts.checkedCast(value);

  //             TreeSubSetTest.suite());
  //     }

  public static long SHORT_DELAY_MS;
  public static long SMALL_DELAY_MS;
  public static long MEDIUM_DELAY_MS;
  public static long LONG_DELAY_MS;

  /**
   * Returns the shortest timed delay. This could be reimplemented to use for example a Property.
   */
  protected long getShortDelay() {
    return 50;
  }