/** * Verify displayed product sku on product page(front-end) equals passed from fixture * * @return string|null */ protected function verifySku() { $fixtureProductSku = $this->product->getSku(); $formProductSku = $this->productView->getProductSku(); if ($fixtureProductSku == $formProductSku) { return null; } return "Displayed product sku on product page(front-end) not equals passed from fixture. " . "Actual: {$formProductSku}, expected: {$fixtureProductSku}."; }