@xutl/test-modules

One eXtremely Useful Tool Library providing a simple preload module that allows replacing of depended modules with mock. Quite useful for testing.

Install

npm install --save-dev @xutl/test-modules

Usage

export NODE_OPTIONS="--no-warnings --experimental-loader=@xutl/modules --require=@xutl/modules"
node my-test.js

This will search along the path of the my-test.js file for a file called modules.json. This must contain a plain json mapping between strings. The key will be a regular expression such that:

actual = original.replace(new RegExp(<key>), <value>);

Alternatively you can set the environment variable MOCK_TABLE to the full path of the modules.json file to use.