.context method not working with stateless components.

[mauriciosoares]

Hey guys, I'm trying to use the .context method from the Full DOM rendering API in a stateless component and I'm getting the following error:

  - Error: You cannot get an instance of a stateless component.
        at getInstance (node_modules/enzyme/build/ReactWrapperComponent.js:81:17)
        at ReactWrapper.instance (node_modules/enzyme/build/ReactWrapper.js:143:31)
        at ReactWrapper.<anonymous> (node_modules/enzyme/build/ReactWrapper.js:601:25)
        at ReactWrapper.single (node_modules/enzyme/build/ReactWrapper.js:1066:19)
        at ReactWrapper.context (node_modules/enzyme/build/ReactWrapper.js:600:29)
        at Spec.<anonymous> (src/shared/components/fieldset/__tests__/fields.js:155:27)

I copied the code from enzyme tests, and updated it to support context:

const Foo = ({ foo }, {_}) => (
  <div>
    <div className="bar">bar</div>
    <div className="qoo">{foo}</div>
  </div>
);

Foo.contextTypes = {
  _: React.PropTypes.func
};

const wrapper = mount(<Foo foo="qux" />, {
  context: {
    _: (e) => e
  }
});
console.log(wrapper.context('_'));

Basically I'm trying to pass a context for my stateless component, if I don't run wrapper.context('_') than no errors are thrown. But when I use it then the error occurs.

I don't know if that's the expected behaviour, or if that's happening with othre methods as well.

Cheers

[lelandrichardson]

Hmm. I wonder what the right way to get at context for SFCs are.

There might be a couple of other methods that call .instance() that don't have to and are failing with SFCs as well. We should increase our coverage for SFCs.

[mauriciosoares]

Totally, I'd help with a PR, but I'm too new in enzyme to know what methods should be tested, started using it today :/

But I'll follow up your progress, and hopefully help you with something.

[blainekasten]

I think this might be fixed by #220