Just about every time I set up a new `Context.Provider`, I end up accidentally specifying a `values` prop rather than `value`.  While it's a minor error, generally I build the container in which the provider resides and commit it to the code base before I ever use it.  It's only later when I go to use it that I realize I did it again.  Since the `Context.Provider` seems pretty much useless without a `value` prop specified, I'd love it if there was a prop error if it is missing... especially if another prop is defined on the `Context.Provider` instead.
log.push('Boundary componentDidMount');
      }
      componentWillUnmount() {
        log.push('Boundary componentWillUnmount');
      }
      onClick() {
        
      }
      componentDidCatch() {
        log.push('Boundary componentDidCatch');
        this.setState({error: true});
      }
    }
    const renderer = ReactTestRenderer.create(<Boundary />);
    expect(renderer.toJSON()).toEqual({
      type: 'div',
      props: {},
      children: ['Happy Birthday!'],
    });
    expect(log).toEqual([
      'Boundary render',
      'Angry render',
      'Boundary componentDidMount',
      'Boundary componentDidCatch',
      'Boundary render',
    ]);
  });
  it('can update text nodes', () => {
    class Component extends React.Component {