Redux Quick Start Guide

A general testing scenario

Let's explore some of the most basic ES6 testing scenarios, shown in the following table.. You can find the working example in the GitHub repository, inside of the CH02 folder:

Designation	JEST test methods
Matchers	it("Matchers", () => {expect(24 + 20).toBe(44);expect({ one: 1, two: 3 }).toEqual({ one: 1, two: 3 });for (let i = 1; i < 10; i++) {for (let j = 1; j < 10; j++) {expect(i + j).not.toBe(0);}}});
Truetiness	it("Truetiness", () => {const isActive = null;expect(isActive).toBeNull();expect(isActive).toBeDefined();expect(isActive).not.toBeUndefined();expect(isActive).not.toBeTruthy();expect(isActive).toBeFalsy(); });
Zeros	it("zeros", () => {const z = 0;expect(z).not.toBeNull();expect(z).toBeDefined(); ...