// Wait 1 sec – message should stay, but it disappears await page.waitForTimeout(1000); await expect(errorMessage).not.toBeVisible(); // Fails in fixed version

// Go to cart and apply promo await page.goto('https://shop.example.com/cart'); await page.fill('input[name="promo"]', 'SAVE10'); await page.click('button.apply-promo');

// Add item to cart await page.goto('https://shop.example.com/product/tshirt'); await page.click('button.add-to-cart');

// Observe error flash const errorMessage = page.locator('.promo-error'); await expect(errorMessage).toHaveText('Invalid code');