Jest-dom: toBeInTheDocument error with material-ui icons

[lpeliberty]

Hello, I think this is a bug but I'm not sure because I'm not an expert on your great lib !
Everything you need is in codesandbox reproduction.

What happened:

Error on test expect(wrapper.find(CloseIcon)).toBeInTheDocument();
But with classic expect(wrapper.find(CloseIcon)).toHaveLength(1); it works... This is why I think it's a bug.

Reproduction:

https://codesandbox.io/s/morning-river-ymv5b?file=/src/App.test.js

Problem description:

received value must be an HTMLElement or an SVGElement.
Received has type: object
Received has value: {}

[eps1lon]

Enzyme does not return actual DOM elements but custom objects. This library does not support wrappers from enzyme.

[nickmccurdy]

Note that this is designed to work with React Testing Library which uses actual DOM elements. If you want to keep Enzyme, you may want to use Enzyme-specific matchers or get the DOM elements from Enzyme before using them with jest-dom.