public function testExport()
{
$storage = new \StorageClientStub();
$storage->setConnection($this->prophesize(StorageConnectionInterface::class)->reveal());
$snippet = $this->snippetFromMethod(Table::class, 'export');
$snippet->addLocal('storage', $storage);
$snippet->addLocal('table', $this->table);
$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());
}