react-test-renderer: toTree() does not yet know how to handle nodes with tag=10

[ambar]

Do you want to request a feature or report a bug?

bug.

What is the current behavior?

  renderer.create(
    <Fragment>
      <Fragment>foo</Fragment>
    </Fragment>
  )
  .toTree()

Invariant Violation: toTree() does not yet know how to handle nodes with tag=10

https://codesandbox.io/s/olky92m01y

What is the expected behavior?

returns a tree.

Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?

16.2.0

[gaearon]

This does look like a bug (or rather missing functionality).
Would you like to send a PR?

[maciej-ka]

I would give it a try.

[aweary]

Thanks @maciej-ka!