public function testClassLiterals()
{
$snippet = $this->snippetFromClass(GqlQuery::class, 2);
$snippet->addLocal('datastore', $this->datastore);
$res = $snippet->invoke('query');
$this->assertInstanceOf(GqlQuery::class, $res->returnVal());
$this->assertFalse(array_key_exists('positionalBindings', $res->returnVal()->queryObject()));
$this->assertFalse(array_key_exists('namedBindings', $res->returnVal()->queryObject()));
$this->assertTrue($res->returnVal()->queryObject()['allowLiterals']);
}