Jest: cannot find module required inside module to be tested (relative path)

Question

I have this component:

import React from \'react\';
import VideoTag from \'./VideoTag\';
import JWPlayer from \'./JWPlayer\';

class VideoWrapper extends React.C         


        

Answer 1

For others ending up here trying to use Jest with TypeScript: you need to include ts in the moduleFileExtensions, e.g.:

"moduleFileExtensions": [
  "js",
  "jsx",
  "json",
  "node",
  "ts"
]

You also need a transform for *.ts files:

transform: {
  "^.+\\.vue$": "vue-jest",
  "^.+\\.js$": "babel-jest",
  "^.+\\.(ts|tsx)$": "ts-jest"
},