.text() => String
Returns a string of the rendered text of the current render tree. This function should be
looked at with skepticism if being used to test what the actual HTML output of the component
will be. If that is what you would like to test, use enzyme's render function instead.
Note: can only be called on a wrapper of a single node.
Returns
String: The resulting string
Examples
const wrapper = shallow(<div><b>important</b></div>);
expect(wrapper.text()).to.equal('important');
const wrapper = shallow(<div><Foo /><b>important</b></div>);
expect(wrapper.text()).to.equal('<Foo />important');