sheep.test.js

const Sheep = require('./sheep');

describe('Sheep class', () => {
  describe('.getName', () => {
    test('create Sheep with name Dolly, check that name is Dolly', () => {
      const s = new Sheep('Dolly');
      expect(s.getName()).toBe('Dolly');
    });
    test('create Sheep with name Sally, check that name is Sally', () => {
      const s = new Sheep('Sally');
      expect(s.getName()).toBe('Sally');
    });
  });
  describe('.setName', () => {
    test('create Sheep with name Sally, change name to Dolly, check name is now Dolly', () => {
      const s = new Sheep('Dolly');
      expect(s.getName()).toBe('Dolly');
      s.setName('Sally');
      expect(s.getName()).toBe('Sally');
    });
    test('new name given (Dolly -> Sally)', () => {
      const s = new Sheep('Dolly');
      expect(s.getName()).toBe('Dolly');
      expect(s.setName('Sally')).toBe(true);
      expect(s.getName()).toBe('Sally');
    });
    test('no new name given (Dolly -> Dolly)', () => {
      const s = new Sheep('Dolly');
      expect(s.getName()).toBe('Dolly');
      expect(s.setName('Dolly')).toBe(false);
      expect(s.getName()).toBe('Dolly');
    });
  });
});