Doctrine\ODM\MongoDB\Tests\Aggregation\Stage\LookupTest::testLookupStageWithCollectionName PHP Method

    public function testLookupStageWithCollectionName()
    {
        $this->requireMongoDB32();
        $this->insertTestData();
        $builder = $this->dm->createAggregationBuilder(\Documents\SimpleReferenceUser::class);
        $builder->lookup('randomCollectionName')->localField('userId')->foreignField('_id')->alias('user');
        $expectedPipeline = [['$lookup' => ['from' => 'randomCollectionName', 'localField' => 'userId', 'foreignField' => '_id', 'as' => 'user']]];
        $this->assertEquals($expectedPipeline, $builder->getPipeline());
        $result = $builder->execute()->toArray();
        $this->assertCount(1, $result);
        $this->assertCount(0, $result[0]['user']);
    }