public function testCopy()
{
$bq = new \BigQueryClientStub();
$snippet = $this->snippetFromMethod(Table::class, 'copy');
$snippet->addLocal('bigQuery', $bq);
$bq->setConnection($this->connection->reveal());
$this->connection->insertJob(Argument::any())->shouldBeCalled()->willReturn(['jobReference' => ['jobId' => '123']]);
$this->table->setConnection($this->connection->reveal());
$res = $snippet->invoke('job');
$this->assertInstanceOf(Job::class, $res->returnVal());
}