Web BuildingIntermediate

QA for Ecommerce Platforms

Name: Lorex Surveillance App
Author: Lorex Technology

Test ecommerce-specific features - checkout flows, payment processing, inventory sync, and order management.

4 hours

5 key concepts

2 in-depth sections

Official Docs

0 of 5 concepts completed (0%)

What You'll Learn

Tutorial Contents

1.Checkout & Payment Testing
2.Inventory & Order Management

1.Checkout & Payment Testing

Full checkout test matrix: ``` Happy path flows to test: 1. Guest checkout (no account required) 2. Registered user checkout (saved address) 3. New shipping address + save for future 4. Apply valid coupon code before checkout 5. Multi-item cart with different SKUs 6. Digital product (no shipping required)

Payment method tests: Credit card (Stripe test cards): ✅ 4242 4242 4242 4242 Success ❌ 4000 0000 0000 0002 Card declined 🔒 4000 0027 6000 3184 Requires 3D Secure authentication ⚠️ 4000 0000 0000 9995 Insufficient funds

Negative checkout scenarios: - Apply expired coupon → clear error message, not applied - Submit with empty cart → redirect to cart page - Session timeout during checkout → graceful recovery - Network error on payment → no double-charge, clear message - Duplicate order submission (double-click) → single order created ```

javascript

// Cypress: payment test
describe("Checkout Payment", () => {
  beforeEach(() => {
    cy.visit("/products/widget-pro");
    cy.get("[data-cy='add-to-cart']").click();
    cy.visit("/checkout");
    cy.fillShippingForm(); // custom command

it("completes purchase with valid test card", () => { // Stripe iframe requires switching to frame cy.getStripeElement("cardNumber").type("4242424242424242"); cy.getStripeElement("cardExpiry").type("1230"); cy.getStripeElement("cardCvc").type("123");

cy.get("[data-cy='place-order']").click();

cy.url().should("include", "/order-confirmation"); cy.get("[data-cy='order-number']").should("be.visible"); cy.get("[data-cy='order-total']").should("contain", "$99.99"); });

it("shows error for declined card", () => { cy.getStripeElement("cardNumber").type("4000000000000002"); cy.getStripeElement("cardExpiry").type("1230"); cy.getStripeElement("cardCvc").type("123"); cy.get("[data-cy='place-order']").click();

cy.get("[data-cy='payment-error']") .should("be.visible") .and("contain", "card was declined"); cy.url().should("include", "/checkout"); // stays on checkout }); }); ```

2.Inventory & Order Management

Inventory edge case tests: ``` TC-INV-001: Last item in stock Setup: Product with stock_count = 1 Steps: 1. Add product to cart 2. Verify "Only 1 left" badge shown 3. Complete purchase 4. Verify stock = 0 after order 5. Verify product shows "Out of Stock" on listing page

TC-INV-002: Race condition concurrent purchases Setup: Product with stock_count = 1 Steps: 1. User A and User B both add to cart simultaneously 2. Both proceed to checkout 3. User A completes checkout first Expected: - User A: Order confirmed, inventory decremented - User B: "Item no longer available" error before payment - Inventory never goes below 0

TC-INV-003: Quantity exceeds stock Setup: Product with stock_count = 3 Steps: 1. Add 3 items to cart 2. Another user buys 2 (inventory drops to 1) 3. Attempt to checkout with 3 Expected: Cart quantity automatically adjusted or clear error message ```

Post-order verification checklist: ``` Order confirmation: ☐ Unique order number generated ☐ Order details correct (items, quantities, prices) ☐ Tax calculated correctly ☐ Shipping cost applied correctly ☐ Discount reflected correctly ☐ Total = subtotal + tax + shipping - discount

Email notifications: ☐ Confirmation email received within 2 minutes ☐ Email contains order number, items, total, delivery estimate ☐ Tracking number included when shipped ☐ Return instructions included

Inventory: ☐ Stock count decremented ☐ "Out of Stock" shown when quantity = 0 ☐ Re-order notification triggered at threshold ```

Code Example

// Ecommerce QA test suite
describe('Ecommerce Checkout Flow', () => {
  describe('Product Page', () => {
    test('Product details are accurate', () => {
      cy.visit('/products/widget-pro');
      cy.get('[data-testid="product-price"]').should('contain', '$99.99');
      cy.get('[data-testid="product-sku"]').should('contain', 'WG-001');
      cy.get('[data-testid="inventory"]').should('contain', 'In Stock');
    });

    test('Add to cart updates cart count', () => {
      cy.get('[data-testid="add-to-cart"]').click();
      cy.get('[data-testid="cart-count"]').should('contain', '1');
    });
  });

  describe('Cart & Checkout', () => {
    test('Cart totals calculate correctly with tax', () => {
      // Subtotal: $99.99, Tax (8%): $8.00, Total: $107.99
      cy.get('[data-testid="subtotal"]').should('contain', '$99.99');
      cy.get('[data-testid="tax"]').should('contain', '$8.00');
      cy.get('[data-testid="total"]').should('contain', '$107.99');
    });

    test('Coupon code applies discount', () => {
      cy.get('[data-testid="coupon-input"]').type('SAVE10');
      cy.get('[data-testid="apply-coupon"]').click();
      cy.get('[data-testid="discount"]').should('contain', '-$10.00');
    });

    test('Proceed to checkout validates fields', () => {
      cy.get('[data-testid="checkout-btn"]').click();
      cy.get('input[name="email"]').type('test@example.com');
      cy.get('input[name="address"]').type('123 Main St');
      // Continue through form...
    });
  });

  describe('Payment Processing', () => {
    test('Payment succeeds with valid sandbox card', () => {
      // Using Stripe test card: 4242 4242 4242 4242
      cy.get('[data-testid="card-number"]').type('4242424242424242');
      cy.get('[data-testid="card-expiry"]').type('1225');
      cy.get('[data-testid="card-cvc"]').type('123');
      cy.get('[data-testid="pay-btn"]').click();
      cy.contains('Order confirmed').should('be.visible');
    });

    test('Payment fails with declined test card', () => {
      // Using Stripe declined card: 4000000000000002
      cy.get('[data-testid="card-number"]').type('4000000000000002');
      cy.get('[data-testid="pay-btn"]').click();
      cy.contains('Card declined').should('be.visible');
    });
  });

  describe('Order Confirmation', () => {
    test('Order confirmation page shows correct details', () => {
      cy.contains('Thank you for your order').should('be.visible');
      cy.get('[data-testid="order-number"]').should('be.visible');
      cy.get('[data-testid="order-total"]').should('contain', '$107.99');
    });

    test('Confirmation email sent to customer', () => {
      // Check email inbox for order confirmation
      cy.checkEmail('test@example.com', 'Order Confirmation');
    });
  });
});

Pro Tips

1Always test with Stripe test cards, not real cards. Use 4242 4242 4242 4242 for success, 4000 0000 0000 0002 for decline, 4000 0027 6000 3184 for 3D Secure.
2Test inventory edge cases: add the last item in stock, add more than available stock, place concurrent orders for the same last item.
3Verify order confirmation emails contain all required information order number, itemized list, billing/shipping address, total, and estimated delivery.
4Test promotional codes thoroughly: expired codes, codes used more than their limit, codes combined with other discounts, negative total scenarios.

Topics Covered

Ecommerce QACheckoutPayment Testing

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