//1. unit under test
describe('Products Service', function() {
  describe('Add new product', function() {
    //2. scenario and 3. expectation
    it('When no price is specified, then the product status is pending approval', ()=> {
      const newProduct = new ProductService().add(...);
      expect(newProduct.status).to.equal('pendingApproval');
    });
  });
});

//1. unit under test
describe('Products Service', () => {
  // 2. specific capability
  describe('Add new product',() => {
    // 3. scenario
    context('When no price is specified', () => {
      // 4. expectation
      it('Should have product status as pending approval', () => {
        const newProduct = new ProductService().add(...);
        expect(newProduct.status).to.equal('pendingApproval');
      });
    });
  });
});