-code With Mosh- Mastering Javascript Unit Testing Site

FAIL checkout.test.js ✕ calculateTax should add 8% sales tax (5ms) ✕ applyDiscount should not apply to non-VIP (2ms) The tests screamed instantly. The broken line was caught before it ever reached production.

test('calculate total price for two items', () => { // Arrange const cart = [{ price: 10 }, { price: 20 }]; // Act const result = calculateTotal(cart); // Assert expect(result).toBe(30); }); Leo typed along. For the first time, he ran npm test and saw that beautiful green checkmark. Passed. -Code With Mosh- Mastering JavaScript Unit Testing

expect(result.method).toBe('creditCard'); }); FAIL checkout