requireWithDeps

foo-spec.js

var requireWithDeps = require('./requireWithDeps');
var sinon = require('sinon');

var fakejQuery = {
    doSomething: sinon.stub()
};

var Foo = requireWithDeps('./Foo.js', {'jquery': fakejQuery});
var fooToTest = new Foo();

// start testing fooToTest

foo.js

define(['jquery'], function ($) {
    var Foo = function () {
    };

    Foo.prototype.doSomethingWithjQuery = function () {
        return $.doSomething();
    };

    return Foo;
});

requireWithDeps.js

var _ = require("underscore");

var requireWithDeps = function(moduleName, dependencies) {
    var originalDefine;
    if (typeof define !== "undefined") {
        originalDefine = define;
    }

    var moduleExports;
    define = function (deps, callback) {
        var requestedDeps = _(deps).map(function (depName) {
            return dependencies[depName];
        });
        moduleExports = callback.apply(this, requestedDeps);
    };

    require(moduleName);

    define = originalDefine;
    return moduleExports;
};

module.exports = requireWithDeps;