Sokil\Mongo\DatabaseTest::testGetDocumentByReference PHP Method

    public function testGetDocumentByReference()
    {
        $collection = $this->database->getCollection('phpmongo_test_collection');
        $collection->delete();
        // create document
        $document = $collection->createDocument(array('param' => 'value'))->save();
        // invalid col and db
        $foundDocument = $this->database->getDocumentByReference(array('$ref' => 'some_collection', '$db' => 'some_db', '$id' => $document->getId()), false);
        $this->assertNull($foundDocument);
        /// invalid db
        $foundDocument = $this->database->getDocumentByReference(array('$ref' => $collection->getName(), '$db' => 'some_db', '$id' => $document->getId()), false);
        $this->assertNull($foundDocument);
        // all valid
        $foundDocument = $this->database->getDocumentByReference(array('$ref' => $collection->getName(), '$db' => $collection->getDatabase()->getName(), '$id' => $document->getId()), false);
        $this->assertSame((string) $document->getId(), (string) $foundDocument->getId());
        $collection->delete();
    }