// parsePartialFrom should pass.
byte[] data = partialMessage.toByteArray();
assertEquals(partialMessage, parser.parsePartialFrom(data));
assertEquals(partialMessage, parser.parsePartialFrom(
partialMessage.toByteString()));
assertEquals(partialMessage, parser.parsePartialFrom(
new ByteArrayInputStream(data)));
assertEquals(partialMessage, parser.parsePartialFrom(
CodedInputStream.newInstance(data)));