Functional components render slots with strings as empty divs

[danielsdeboer]

Version

1.0.0-beta.16

Reproduction link

https://codesandbox.io/s/j376k9jvv

Steps to reproduce

• Create a basic functional component that renders content from the default slot
• Attempt to mount the component with a string in the default slot

What is expected?

Should render the string, eg <p>Some string</p>

What is actually happening?

Test utils renders an empty <div>, eg <p><div></div></p>

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The component works as expected outside of the test environment. See the repro, where slotted content renders as expected.

[kfischer-okarin]

Since version 1.0.0-beta.17 it also shows following warning:

[Vue warn]: Error compiling template:
    
text content
    
- Component template requires a root element, rather than just text.