/** * @magentoDataFixture Magento/Sales/_files/order.php * @magentoDataFixture Magento/Sales/_files/report_bestsellers.php */ public function testGetItems() { $expectedResult = array(1 => 2); $actualResult = array(); /** @var \Magento\Reports\Model\Item $reportItem */ foreach ($this->_collection->getItems() as $reportItem) { $actualResult[$reportItem->getData('product_id')] = $reportItem->getData('qty_ordered'); } $this->assertEquals($expectedResult, $actualResult); }