text: import { expect } from 'chai';
  import { getCompletedTodos } from '../selectors';
  
  describe('The getCompletedTodos selector', () => {
      it('Returns only completed todos', () => {
          const fakeTodos = [{
              text: 'Say Hello',
              isCompleted: true,
          }, {
              text: 'Say Goodbye',
              isCompleted: false,
          }, {
              text: 'Climb Mount Everest',
              isCompleted: false,
          }];
          const expected = [{
              text: 'Say Hello',
              isCompleted: true,
          }];
          const actual = getCompletedTodos.resultFunc(fakeTodos);
  
          expect(actual).to.deep.equal(expected);
      });
  });