Error when using withFormik with enzyme

[mtnori]

Describe the bug
Error when using withFormik with enzyme

To Reproduce

1. git clone https://github.com/mtnori/formik-enzyme-issue.git
2. cd formik-enzyme-issue
3. npm i
4. npm run test
5. Error is produced

Expected behavior
successful tests

---

• Formik Version: 1.0.0-beta.3
• React Version: 16.4.1
• OS: Windows 10
• Node Version: 8.11.1
• Package Manager and Version: npm 6.1.0

[JustusFT]

Hi, I also ran into this issue. I get the error Enzyme Internal Error: unknown node with tag 13. It happens whenever I try mount a component that has formik in it. It seems that the current version of enzyme is missing a tag type that formik is using. See their issue enzymejs/enzyme#1509

There's a fix there but it isn't released yet. But you can add it now with enzymejs/enzyme#1513 (comment)

yarn add --dev enzyme-adapter-react-16@npm:enzyme-react-adapter-future

After running this command, your example works fine for me. Hope this helps!

[mtnori]

@JustusFT It work fine with your solution, Thanks.