public function testSetBindings()
{
$snippet = $this->snippetFromMethod(PolicyBuilder::class, 'addBinding');
$snippet->addLocal('builder', $this->pb);
$res = $snippet->invoke();
$this->assertEquals('roles/admin', $this->pb->result()['bindings'][0]['role']);
$this->assertEquals('user:[email protected]', $this->pb->result()['bindings'][0]['members'][0]);
}