injectr

Finally, a solution to node.js dependency injection

Install it

npm install injectr. Boom.

Use it

var injectr = require('injectr');
var myScript = injectr('./lib/myScript.js', {
    fs : mockFs,
    crypto : mockCrypto
});

Now when you require('fs') or require('crypto') in myScript.js, what you get is mockFs or mockCrypto. It works with relative requires too. Just make sure you make the property name exactly the same as what is required in the file being tested.

Treat injectr like require for your tests, with a second argument to pass in your mocks. The only thing to note is that paths are relative to the working directory, not to the file location as with require.

Share it

injectr is under the MIT License. Fork it. Modify it. Pass it around.