text: describe('String', () => {
    let reducer;
    before(() => {
      reducer = (state = {}, action) => {
        switch (action.type) {
          default:
            return state;
        }
      };
      reducer = deduce(reducer);
    });
    it('SET', () => {
      expect(reducer(
        'Old String', 
        { type: 'SET', value: 'New String' }
      )).toEqual('New String');
    });
  });