This patch will allow path mapping to be fully supported, by allowingmoduleNameMapper to be configured.

Issue

Currently, you can add paths to yourtsconfig and the app will run fine. Butjest /ts-jest does not use the configuration from yourtsconfig. Configuring themoduleNameMapper will solve this. Sadly, the property is not "supported" and tests can not be run if the configuration is set.

Example usage:

Changing the following files will allow you to import modules from thesrc folder, by prefixing the import path with a tilde. E.g. a component living insrc/components/Button can always be imported via~/components/Button. No../../../ anymore!

tsconfig.json

{  "compilerOptions": {     ...+    "baseUrl": ".",+    "paths": {+      "~/*": ["src/*"]+    }  },

package.json

{  ...  "jest": {    ...+    "moduleNameMapper": {+      "^~/(.*)$": "<rootDir>/src/$1"+    }  },}

Changes:

1. AddbaseUrl sotsconfig-paths-webpack-plugin will not warn that it is missing (Fixed problem with tsconfig.json baseUrl and paths #223)
2. Allow overridingmoduleNameMapper (Support for TypeScripts 'paths' option #203)

Allow overriding themoduleNameMapper configuration is the pragmatic approach. If you're using absolute paths + react-native you would have to re-add the mapping.