Files.setLastModifiedTime(temp, FileTime.fromMillis(0));
    assertEquals(0, Files.getLastModifiedTime(temp).toMillis());
    MoreFiles.touch(temp);
    assertThat(Files.getLastModifiedTime(temp).toMillis()).isNotEqualTo(0);
  }

  public void testCreateParentDirectories_root() throws IOException {
    // We use a fake filesystem to sidestep flaky problems with Windows (b/136041958).

      assertThat(expected).hasMessageThat().matches(pattern);
      Matcher matcher = pattern.matcher(expected.getMessage());
      assertThat(matcher.matches()).isTrue();
      assertThat(matcher.group(1)).isNotEqualTo(matcher.group(2));
    }
  }

  public void testOf() {
    assertMapEquals(ImmutableMap.of("one", 1), "one", 1);
    assertMapEquals(ImmutableMap.of("one", 1, "two", 2), "one", 1, "two", 2);

    assertThat(dim1 * dim2).isAtLeast(0);
    testConcat_overflow(dim1, dim2);
  }

  private static void testConcat_overflow(int arraysDim1, int arraysDim2) {
    assertThat((long) arraysDim1 * arraysDim2).isNotEqualTo((long) (arraysDim1 * arraysDim2));

    long[][] arrays = new long[arraysDim1][];
    // it's shared to avoid using too much memory in tests
    long[] sharedArray = new long[arraysDim2];

    assertThat(dim1 * dim2).isAtLeast(0);
    testConcat_overflow(dim1, dim2);
  }

  private static void testConcat_overflow(int arraysDim1, int arraysDim2) {
    assertThat((long) arraysDim1 * arraysDim2).isNotEqualTo((long) (arraysDim1 * arraysDim2));

    long[][] arrays = new long[arraysDim1][];
    // it's shared to avoid using too much memory in tests
    long[] sharedArray = new long[arraysDim2];

  // valid result thrown by java.util.TreeSet#equals.
  private static void assertNotEqualLenient(TreeSet<?> unexpected, SortedSet<?> actual) {
    try {
      assertThat(actual).isNotEqualTo(unexpected);
    } catch (ClassCastException accepted) {
    }
  }

  public void testHeadSetInclusive() {
    String[] strings = NUMBER_NAMES.toArray(new String[0]);

      assertThat(expected).hasMessageThat().matches(pattern);
      Matcher matcher = pattern.matcher(expected.getMessage());
      assertThat(matcher.matches()).isTrue();
      assertThat(matcher.group(1)).isNotEqualTo(matcher.group(2));
    }
  }

  public void testOf() {
    assertMapEquals(ImmutableMap.of("one", 1), "one", 1);
    assertMapEquals(ImmutableMap.of("one", 1, "two", 2), "one", 1, "two", 2);

  // valid result thrown by java.util.TreeSet#equals.
  private static void assertNotEqualLenient(TreeSet<?> unexpected, SortedSet<?> actual) {
    try {
      assertThat(actual).isNotEqualTo(unexpected);
    } catch (ClassCastException accepted) {
    }
  }

  public void testHeadSetInclusive() {
    String[] strings = NUMBER_NAMES.toArray(new String[0]);

    TypeToken<?> matrixType =
        type.resolveType(Holder.class.getDeclaredField("matrix").getGenericType());
    assertEquals(List[].class, matrixType.getRawType());
    assertThat(matrixType.getType()).isNotEqualTo(new TypeToken<List<?>[]>() {}.getType());
  }

  public void testWildcardCaptured_wildcardWithImplicitBound() throws Exception {
    TypeToken<Holder<?>> type = new TypeToken<Holder<?>>() {};

    TypeToken<?> matrixType =
        type.resolveType(Holder.class.getDeclaredField("matrix").getGenericType());
    assertEquals(List[].class, matrixType.getRawType());
    assertThat(matrixType.getType()).isNotEqualTo(new TypeToken<List<?>[]>() {}.getType());
  }

  public void testWildcardCaptured_wildcardWithImplicitBound() throws Exception {
    TypeToken<Holder<?>> type = new TypeToken<Holder<?>>() {};