getHTML() is failing, not sure why.

[jisaacks]

I keep getting:

No style rules found on passed Component

I have been able to trace it to this line:

jest-styled-components/src/utils.js

Line 25 in 4b07fde

const getHTML = () => (isServer() ? new ServerStyleSheet().getStyleTags() : sheet.toString());

  const getHTML = () => (isServer() ? new ServerStyleSheet().getStyleTags() : sheet.toString());

My tests are running in node, so isServer is returning true, but new ServerStyleSheet().getStyleTags() is returning an empty string. However if I force it to instead use sheet.toString() everything works as expected and my tests pass/fail as expected.

[jisaacks]

Any help on this?

If I manually edit that line to be:

const getHTML = () => (sheet.toString());

Everything works as expected.

I would hate to have to fork this project just to make that change tho.

Would love some help or pointed in the right direction to determine why isServer() is true but new ServerStyleSheet().getStyleTags() returns an empty string, even tho sheet.toString() works as expected.

Thanks.