React Testing Patterns

I had a friend send me this testing code:

describe('handleChangeStatusConditionSearchText', () => {
test('should handle changing status search text within FormWizard', () =>
{
const wrapper = shallow();
const state = {
...wrapper.instance().state,
statusConditionSearchText: 'poop'
};
wrapper.instance().handleChangeStatusConditionSearchText('poop');
expect(wrapper.instance().state).toEqual(state);
});
});

And I had a few concerns with it, so I decided to record my thoughts :)
(Learn more about enzyme (https://github.com/airbnb/enzyme) and shallow
rendering (https://github.com/airbnb/enzyme/blob/f3bbfd3c2b1ae5c09d50fa0429d0dd599d3bbe82/docs/api/shallow.md), and then never shallow render again... 😉)