text: import React from 'react';
  
  import Container from '../Container';
  
  describe('<Container />', () => {
    it('Should render a <div> tag', () => {
      const renderedComponent = shallow(<Container />);
      expect(renderedComponent.type()).toEqual('div');
    });
  
    it('Should have a className attribute', () => {
      const renderedComponent = shallow(<Container />);
      expect(renderedComponent.prop('className')).toBeDefined();
    });
  
    it('Should adopt a valid attribute', () => {
      const id = 'test-id';
      const renderedComponent = shallow(<Container id={id} />);
      expect(renderedComponent.prop('id')).toEqual(id);
    });
  
    it('Should not adopt an invalid attribute', () => {
      const renderedComponent = shallow(<Container attribute="test" />);
      expect(renderedComponent.prop('attribute')).toBeUndefined();
    });
  });
  