Serializer triggers that it's expecting an enzyme-adapter when it's already provided.

Error

Enzyme Internal Error: Enzyme expects an adapter to be configured, but found none.
      To configure an adapter, you should call `Enzyme.configure({ adapter: new Adapter() })`
      before using any of Enzyme's top level APIs, where `Adapter` is the adapter
      corresponding to the library currently being tested. For example:

      import Adapter from 'enzyme-adapter-react-15';

      To find out more about this, see http://airbnb.io/enzyme/docs/installation/index.html

Libraries Versions

"enzyme-to-json": "^3.3.5"
"enzyme-adapter-react-15": "^1.3.0",
"enzyme": "^3.8.0",
"react": "^15.4.0",
"react-dom": "^15.4.0",
"jest": "^19.0.2",

How to reproduce?

This is a quite clean repro-case with only the essential parts.

https://gist.github.com/Ranguro/a14b6b8e6868ff508b80f29df8a99971

I believe the problem is linked to this specific line in my package.json

    "snapshotSerializers": [
      "<rootDir>/node_modules/enzyme-to-json/serializer"
    ]

When I add this line - the Enzyme Internal Error is being thrown. If I remove it and instead- run the following, it doesn't throw the error:

https://gist.github.com/Ranguro/f318b60054f415fd2a418900c2562742

See how I added toJson from enzyme-to-json there and the test passes.

This is my setupTests.js for the enzyme adapter.

/*eslint-disable*/

var enzyme = require('enzyme');
var Adapter = require('enzyme-adapter-react-15');
enzyme.configure({ adapter: new Adapter() });

This is how I setup my setupTests.js

    "setupTestFrameworkScriptFile": "<rootDir>/config/jest/setupTests.js",

Other Comments

I tried throw new Error('fail') to check if the configurations was being run when running tests and it showed the output well.

● Test suite failed to run

    fail

      at Object.<anonymous> (config\jest\setupTests.js:6:7)

adriantoine / enzyme-to-json

Serializer triggers that it's expecting an enzyme-adapter when it's already provided. #129