public void testSerializationPackedWithoutGetSerializedSize()
throws Exception {
// Write directly to an OutputStream, without invoking getSerializedSize()
// This used to be a bug where the size of a packed field was incorrect,
// since getSerializedSize() was never invoked.
TestPackedTypes message = TestUtil.getPackedSet();
// Directly construct a CodedOutputStream around the actual OutputStream,
// in case writeTo(OutputStream output) invokes getSerializedSize();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
CodedOutputStream codedOutput = CodedOutputStream.newInstance(outputStream);
message.writeTo(codedOutput);
codedOutput.flush();
TestPackedTypes message2 = TestPackedTypes.parseFrom(
outputStream.toByteArray());
TestUtil.assertPackedFieldsSet(message2);
}