| const { Cart } = require('./solution'); |
|
|
| describe('Cart', () => { |
| test('empty cart totals', () => { |
| const c = new Cart(); |
| expect(c.subtotal()).toBe(0); |
| expect(c.discount()).toBe(0); |
| expect(c.shipping()).toBe(0); |
| expect(c.total()).toBe(0); |
| }); |
| test('add merges quantities and is chainable', () => { |
| const c = new Cart().add('a', 'Kalem', 1000).add('a', 'Kalem', 1000, 2); |
| expect(c.items.get('a').qty).toBe(3); |
| expect(c.subtotal()).toBe(3000); |
| }); |
| test.each([[-1, 1], [1.5, 1], ['10', 1]])('rejects bad price %p', (p, q) => { |
| expect(() => new Cart().add('x', 'X', p, q)).toThrow(TypeError); |
| }); |
| test.each([0, 1.5])('rejects bad qty %p', (q) => { |
| expect(() => new Cart().add('x', 'X', 100, q)).toThrow(RangeError); |
| }); |
| test('remove partially, fully and unknown', () => { |
| const c = new Cart().add('a', 'A', 100, 3); |
| expect(c.remove('a', 1)).toBe(true); |
| expect(c.items.get('a').qty).toBe(2); |
| expect(c.remove('a')).toBe(true); |
| expect(c.items.size).toBe(0); |
| expect(c.remove('zz')).toBe(false); |
| }); |
| test('percent coupon is case-insensitive and rounds', () => { |
| const c = new Cart().add('a', 'A', 1005); |
| c.applyCoupon('yuzde10'); |
| expect(c.discount()).toBe(101); |
| }); |
| test('fixed coupon is capped at subtotal', () => { |
| const c = new Cart().add('a', 'A', 3000); |
| c.applyCoupon('INDIRIM50'); |
| expect(c.discount()).toBe(3000); |
| expect(c.total()).toBe(2999); |
| }); |
| test('invalid coupon throws', () => { |
| expect(() => new Cart().applyCoupon('YOK')).toThrow('Geçersiz kupon'); |
| }); |
| test('free shipping threshold uses discounted amount', () => { |
| const c = new Cart().add('a', 'A', 50000); |
| expect(c.shipping()).toBe(0); |
| c.applyCoupon('YUZDE10'); |
| expect(c.shipping()).toBe(2999); |
| expect(c.total()).toBe(50000 - 5000 + 2999); |
| }); |
| test('below threshold pays shipping', () => { |
| expect(new Cart().add('a', 'A', 49999).shipping()).toBe(2999); |
| }); |
| }); |
|
|
