(Medium) When Code Duplication In Tests Is Acceptable - Cart Test Example With Abstraction

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18 Sep '26, 05:29current

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	const FakeCloth = {
	any: () => {
	return Product()
	.withSize('XL') // Mandatory
	.withColor('black'); // Mandatory
	}
	};

	module('Shirts cart');

	test('a valid product can be retrieved from the cart after being added', () => {
	const fakeShirt = FakeCloth.any().asType('shirt');
	const cart = ShirtsCart();
	cart.addProduct(fakeShirt);
	expect(cart).toContain(fakeShirt);
	});

	test('when we try to add an invalid product to the cart then it\'s not added', () => {
	const fakePants = FakeCloth.any().asType('pants');
	const cart = ShirtsCart();
	cart.addProduct(fakePants);
	expect(cart).not.toContain(fakePants);
	});