if (chunk1 > 0) {
      write(out, data, 0, chunk1, singleByte);
      assertTrue(ByteSource.wrap(data).slice(0, chunk1).contentEquals(source));
    }
    File file = out.getFile();
    assertThat(file).isNull();

    // Write data to go over the threshold
    if (chunk2 > 0) {
      write(out, data, chunk1, chunk2, singleByte);
      file = out.getFile();
      assertEquals(dataSize, file.length());

    if (chunk1 > 0) {
      write(out, data, 0, chunk1, singleByte);
      assertTrue(ByteSource.wrap(data).slice(0, chunk1).contentEquals(source));
    }
    File file = out.getFile();
    assertThat(file).isNull();

    // Write data to go over the threshold
    if (chunk2 > 0) {
      write(out, data, chunk1, chunk2, singleByte);
      file = out.getFile();
      assertEquals(dataSize, file.length());

        final byte[] singleByte = new byte[] { 'A' };
        final String encoded = Base64Util.encode(singleByte);
        assertNotNull("Encoded result should not be null", encoded);
        final byte[] decoded = Base64Util.decode(encoded);
        assertEquals("Decoded should have same length", 1, decoded.length);
        assertEquals("Decoded byte should match", singleByte[0], decoded[0]);
    }

    /**

	return t&other == other
}

// Overlaps returns whether *any* flags in t overlaps with other.
func (t Mask) Overlaps(other Mask) bool {
	return t&other != 0
}

// SingleType returns whether t has a single type set.
func (t Mask) SingleType() bool {
	return bits.OnesCount64(uint64(t)) == 1
}

// FromUint64 will set a mask to the uint64 value.
func (t *Mask) FromUint64(m uint64) {
	*t = Mask(m)
}