Google\Cloud\Tests\Snippets\PubSub\MessageTest::testAttributes PHP Method

    public function testAttributes()
    {
        $snippet = $this->snippetFromMethod(Message::class, 'attributes');
        $snippet->addLocal('message', $this->message);
        $res = $snippet->invoke('attributes');
        $this->assertEquals($this->msg['attributes'], $res->returnVal());
    }