/** * Check if pipeline added as new or appended to previouse on same operator */ public function testPipeline_ToString() { $pipeline = new Pipeline($this->collection); // insert new match pipeline $pipeline->match(array('field1' => 'value1')); // insert new project pipeline $pipeline->project(array('field2' => 'value2')); // insert new match pipeline $pipeline->match(array('field3' => 'value3')); // append match pipeline to previous $pipeline->match(array('field3' => 'value3merged', 'field4' => 'value4')); // insert new sort pipeline $pipeline->sort(array('field5' => 'value5')); // insert new group pipeline $pipeline->group(array('_id' => '$groupField', 'field6' => array('$sum' => 1))); $validJson = '[{"$match":{"field1":"value1"}},{"$project":{"field2":"value2"}},{"$match":{"field3":"value3merged","field4":"value4"}},{"$sort":{"field5":"value5"}},{"$group":{"_id":"$groupField","field6":{"$sum":1}}}]'; $this->assertEquals($validJson, $pipeline->__toString()); }