Demo of the issue with context testing

• facebook/react#13150
• enzymejs/enzyme#1693

yarn
yarn test

  console.error node_modules/fbjs/lib/warning.js:33
    Warning: Detected multiple renderers concurrently rendering the same context provider. This is currently unsupported.

Explanation

Issue happens when you use react-test-renderer and Enzyme in the same test file.

Solution

Use enzyme-to-json instead of react-test-renderer.

See example of migration in this repository: branch enzyme-to-json.