Sokil\Mongo\CollectionTest::testUpdate_ExpressionIsExpressionObject PHP Method

    public function testUpdate_ExpressionIsExpressionObject()
    {
        // create documents
        $d1 = $this->collection->createDocument(array('p' => 1))->save();
        $d2 = $this->collection->createDocument(array('p' => 2))->save();
        $this->collection->update($this->collection->expression()->where('p', 1), $this->collection->operator()->set('k', 'v'), array('multiple' => true));
        // test 1
        $data1 = $this->collection->getDocumentDirectly($d1->getId())->toArray();
        unset($data1['_id']);
        $this->assertEquals(array('p' => 1, 'k' => 'v'), $data1);
        // test 2
        $data2 = $this->collection->getDocumentDirectly($d2->getId())->toArray();
        unset($data2['_id']);
        $this->assertEquals(array('p' => 2), $data2);
    }