<!--
  Note: if the issue is about documentation or the website, please file it at:
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**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

all: Array<ReactTestInstance>,
  message: string,
): ReactTestInstance {
  if (all.length === 1) {
    return all[0];
  }
  const prefix =
    all.length === 0
      ? 'No instances found '
      : `Expected 1 but found ${all.length} instances `;
  throw new Error(prefix + message);
}
function propsMatch(props: Object, filter: Object): boolean {