[docs]Add Jest note on Readme

staylor · Aug 14, 2019 · 7a73947 · 7a73947
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diff --git a/README.md b/README.md
@@ -117,6 +117,15 @@ renderToNodeStream(app)
   .pipe(res);
 ```
 
+## Usage in Jest
+While testing in using jest, if there is a need to emulate SSR, the following string is required to have the test behave the way they are expected to.
+
+```
+import { HelmetProvider } from 'react-helmet-async';
+
+HelmetProvider.canUseDOM = false;
+```
+
 ## License
 
 Licensed under the Apache 2.0 License, Copyright © 2018 Scott Taylor