How do I move jest tests to a /test folder and get them to run?

Question

edit: I'm pretty sure this question is out of date and Jest has changed since then. Don't assume the answers will work or even be relevant now.

Jest expects tests to be in _tests_ folder or to be named blah.test.js. I don't like either of those patterns. I want my test files to be in /test and naming them test/index.ios.test.js seems redundant and silly. My first stab at this is to change my jest config in package.json to be:

"jest": {     "testPathDirs": ["test"],     "testRegex": "\\.(js|jsx)$",     "preset": "react-native" } 

Which find the tests successfully but they all fail:

Cannot find module 'setupDevtools' from 'setup.js'      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:151:17)   at Object.<anonymous> (node_modules/react-native/jest/setup.js:23:1) 

That function is in node_modules/react-native/Libraries/Core/Devtools/setupDevtools.js. How do I tell Jest where to find it?

Answer 1

I solved the problem by just setting the regex so it finds all .js files in my ./test folder:

"jest": {    "preset": "react-native",     "globals": {         "__DEV__": true     },     "testRegex": "./test/.*.js$",     "rootDir": "."  }, 

(jcollum here: I don't know what __DEV__ is actually doing there but an error will be thrown if isn't. jest 17.0.3)

Answer 2

I think the best way to go about this is to configure testMatch. It defaults to:

[ "**/__tests__/**/*.[jt]s?(x)", "**/?(*.)+(spec|test).[jt]s?(x)" ] 

So you could either change __tests__ to tests or add a new entry into the array that checks for both. My use the following in my package.json:

  "jest": {     "testMatch": [ "**/tests/**/*.[jt]s?(x)", "**/?(*.)+(spec|test).[jt]s?(x)" ]   },