// first bulk-write empty array: should not change anything
int expectedSize = 0;
byte[] expectedData = randomizedByteArrayWithSize(expectedSize);
out.writeBytes(expectedData);
assertEquals(expectedSize, out.size());
assertArrayEquals(expectedData, out.bytes().toBytes());
// bulk-write again with actual bytes
expectedSize = 10;
expectedData = randomizedByteArrayWithSize(expectedSize);
out.writeBytes(expectedData);