Google\Cloud\Tests\Snippets\Datastore\DatastoreClientTest::testTransaction PHP Method

    public function testTransaction()
    {
        $snippet = $this->snippetFromMethod(DatastoreClient::class, 'transaction');
        $snippet->addLocal('datastore', $this->client);
        $this->connection->beginTransaction(Argument::any())->shouldBeCalled()->willReturn(['transaction' => 'foo']);
        $this->client->setConnection($this->connection->reveal());
        $res = $snippet->invoke('transaction');
        $this->assertInstanceOf(Transaction::class, $res->returnVal());
    }