Doctrine\MongoDB\Tests\Aggregation\Stage\ProjectTest::testAccumulatorsWithMultipleArguments PHP Method

    public function testAccumulatorsWithMultipleArguments($operator)
    {
        $projectStage = new Project($this->getTestAggregationBuilder());
        $projectStage->field('something')->{$operator}('$expression1', '$expression2');
        $this->assertSame(['$project' => ['something' => ['$' . $operator => ['$expression1', '$expression2']]]], $projectStage->getExpression());
    }