text: import produce from 'immer';
  
  import homeReducer from '../reducer';
  import { changeUsername } from '../actions';
  
  /* eslint-disable default-case, no-param-reassign */
  describe('homeReducer', () => {
    let state;
    beforeEach(() => {
      state = {
        username: '',
      };
    });
  
    it('should return the initial state', () => {
      const expectedResult = state;
      expect(homeReducer(undefined, {})).toEqual(expectedResult);
    });
  
    it('should handle the changeUsername action correctly', () => {
      const fixture = 'mxstbr';
      const expectedResult = produce(state, draft => {
        draft.username = fixture;
      });
  
      expect(homeReducer(state)).toEqual(expectedResult);
    });
  });
  