protected function assertNextTagWire(StreamReader $reader, Stream $stream, $expectedTag, $expectedWire)
{
$key = $reader->readVarint($stream);
$tag = WireFormat::getTagFieldNumber($key);
$wire = WireFormat::getTagWireType($key);
$this->assertEquals($expectedTag, $tag);
$this->assertEquals($expectedWire, $wire);
}