public function testGroups() { $defaultGroup = ['_id' => '$ts', 'totalCount' => ['$sum' => '$count.100']]; $pipeline = $this->instance->getPipeline(); $this->assertSame($defaultGroup, $pipeline[2]['$group']); $this->instance->groupByDimensionName(); $pipeline = $this->instance->getPipeline(); $defaultGroup['_id'] = '$name'; $this->assertSame($defaultGroup, $pipeline[2]['$group']); $this->instance->groupByDimensionValue(); $pipeline = $this->instance->getPipeline(); $defaultGroup['_id'] = ['name' => '$name', 'value' => '$value']; $this->assertSame($defaultGroup, $pipeline[2]['$group']); $this->instance->groupByEntityName(); $pipeline = $this->instance->getPipeline(); $defaultGroup['_id'] = '$entity'; $this->assertSame($defaultGroup, $pipeline[2]['$group']); }