Overview

Common API used for an automated testing:

• sinon (sinonjs.com) for spying/stubbing/mocking.
• FakeTimers for timers manipulation, docs
• chai (chaijs.com) for asserting with expect API enouraged and some plugins:
  • chai-as-promised - Promises support, docs.
  • chai-datetime - Dates support, docs.
  • chai-integer - assirting on Integer type, docs.
  • chai-url - URLs support, docs.
  • sinon-chai - integration with sinon, docs.
  • chai-string - various handly String assertions, docs.
  • chai-dom - DOM support, docs.
  • chai-like - Partial objects comparison, docs.

Usage example

const { expect, sinon, FakeTimers } from '@majus/testing';

describe('My tests', () => {
  let clock;

  beforeEach(() => {
    sinon.stub(console, 'log');
    clock = FakeTimers.install();
  });

  afterEach(() => {
    clock.uninstall();
    sinon.restore();
  });

  it('my test for integer', () => {
    const result = myIntFunc();
    expect(result).to.be.an('integer').and.to.be.least(0);
  });

  it('my test for promise', async () => {
    const result = myAsyncFunc();
    await expect(result).eventually.to.be.fulfilled;
  });

  it('my test for date', () => {
    const result = myDateFunc();
    expect(result).to.be.a('date').and.beforeDate(new Date());
  });

  it('my test for date', () => {
    const result = myStringFunc();
    expect(result).to.be.a('string').and.startWith('[');
  });

  it('my test for objects', () => {
    const result = myObjectFunc();
    expect(result).to.be.an('object').and.be.like({ a: 1 });
  });

  it('my test for arrays', () => {
    const result = myArrayFunc();
    expect(result).to.be.an('array').and.be.like([{ a: 1 }, { a: 2 }]);
  });

  it('my test for sinon', () => {
    myComplexFunc();
    expect(console.log).not.to.be.called;
  });

  it('my test for timers', () => {
    let flag = false;
    setTimeout(() => {
      flag = true;
    }, 10000);
    clock.tick(10000);
    expect(flag).to.be.true;
  });
  
});