Google\Cloud\Tests\Snippets\Iam\PolicyBuilderTest::testSetEtag PHP Method

    public function testSetEtag()
    {
        $snippet = $this->snippetFromMethod(PolicyBuilder::class, 'setEtag');
        $snippet->addLocal('builder', $this->pb);
        $snippet->addLocal('oldPolicy', $this->policy);
        $res = $snippet->invoke();
        $this->assertEquals('foo', $this->pb->result()['etag']);
    }