todo-items-stories-with-specs.js

storiesOf('MainSection', module)
  .add('some completed', () => {
    const story = getMainSection([
      { id: 'one', text: 'Item One', completed: false },
      { id: 'two', text: 'Item Two', completed: true },
    ]);

    specs(() => describe('some completed', function () {
      it('Should indicate that only one item is left', function () {
        let output = mount(story);
        expect(output.text()).toContain('1 item left');
      });
    }));
    return story
});