describe()

in spec/index.js [94:139]

• 36 lines of code
• 1 McCabe index (conditional complexity)

  describe('Handling viewport events', function () {
    const count = 20000;

    beforeEach(doAsync(async () => {
      listView = new ListView({
        el: '.test-container',
      }).set({
        items: _.map(_.range(count), i => ({ text: i })),
      });

      await render();
      listView.viewport.scrollTo({ y: 0 });
      await sleep(redrawInterval);
    }));

    afterEach(doAsync(async () => {
      listView.remove();
      await sleep(redrawInterval);
    }));

    it('should trigger redraw on viewport change', doAsync(async () => {
      const spy = sinon.spy();

      listView.once('didRedraw', spy);
      listView.viewport.trigger('change');
      expect(spy).not.to.be.called;

      await sleep(150);
      expect(spy).to.be.calledOnce;
    }));

    it('should block redraw for 0.2 second when press a key', doAsync(async () => {
      const spy = sinon.spy();

      listView.once('didRedraw', spy);
      listView.viewport.trigger('keypress');
      listView.viewport.trigger('change');
      expect(spy).not.to.be.called;

      await sleep(150);
      expect(spy).not.to.be.called;

      await sleep(150);
      expect(spy).to.be.calledOnce;
    }));
  });