Testing Yeoman generator with bowerInstall and/or npmInstall

Question

I have a Yeoman generator that uses this.bowerInstall()

When I test it, it tries to install all the bower dependencies that I initialized this way. Is there a way to mock this function ?

The same goes for the this.npmInstall() function.

Answer 1

Take a look at the tests for the Bootstrap generator, it contains an example of mocking the bowerInstall() function:

beforeEach(function (done) {
    this.bowerInstallCalls = [];

    // Mock bower install and track the function calls.
    this.app.bowerInstall = function () {
        this.bowerInstallCalls.push(arguments);
    }.bind(this);

}.bind(this));