<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

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

bug.

**What is the current behavior?**

```js
  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

return expectOne(
      this.findAllByProps(props, {deep: false}),
      `with props: ${JSON.stringify(props)}`,
    );
  }
  findAll(
    predicate: Predicate,
    options: ?FindOptions = null,
  ): Array<ReactTestInstance> {
    return findAll(this, predicate, options);
  }
  findAllByType(
    type: any,
    options: ?FindOptions = null,
  ): Array<ReactTestInstance> {
    return findAll(this, node => node.type === type, options);
  }
  findAllByProps(
    props: Object,
    options: ?FindOptions = null,
  ): Array<ReactTestInstance> {
    return findAll(
      this,
      node => node.props && propsMatch(node.props, props),
      options,
    );
  }
}
function findAll(