CollectSpliterators.flatMap(
                    Arrays.spliterator(new String[] {"abc", "", "de", "f", "g", ""}),
                    (String str) -> charactersOf(str).spliterator(),
                    Spliterator.SIZED | Spliterator.DISTINCT | Spliterator.NONNULL,
                    7))
        .expect('a', 'b', 'c', 'd', 'e', 'f', 'g');
  }

  public void testFlatMap_nullStream() {
    SpliteratorTester.of(
            () ->

        byte[] got = impl.getBuffer();
        assertNotNull(got);
        assertEquals(8, got.length, "Allocation uses configured maximum size when cache is empty");
        assertNotSame(supplied, got, "Zero-sized cache must not return the released instance");
    }

    // Edge: releasing null must be a no-op without exceptions
    @Test
    @DisplayName("releaseBuffer(null) is a no-op and does not throw")

    // We use entries next == 0 to indicate UNSET, so actual capacity is 1 less than requested.
    return max(MIN_HASH_TABLE_SIZE, Hashing.closedTableSize(expectedSize + 1, 1.0));
  }

  /** Creates and returns a properly-sized array with the given number of buckets. */
  static Object createTable(int buckets) {
    if (buckets < 2
        || buckets > Ints.MAX_POWER_OF_TWO
        || Integer.highestOneBit(buckets) != buckets) {

        assertEquals(data.hashCode(), blob.hashCode(), "hashCode should equal the array's hashCode");
    }

    // Validates equals() returns true for same-sized, equal-content blobs
    @Test
    @DisplayName("equals: identical content and size -> true")
    void equals_identicalContent_true() {
        // Arrange
        byte[] a = new byte[] { 1, 2, 3 };

    // We use entries next == 0 to indicate UNSET, so actual capacity is 1 less than requested.
    return max(MIN_HASH_TABLE_SIZE, Hashing.closedTableSize(expectedSize + 1, 1.0));
  }

  /** Creates and returns a properly-sized array with the given number of buckets. */
  static Object createTable(int buckets) {
    if (buckets < 2
        || buckets > Ints.MAX_POWER_OF_TWO
        || Integer.highestOneBit(buckets) != buckets) {