Jasmine Spies: Mocking

test-mock.js

var testModule = require("./testModule"),
    testModule2 = require('./testModule2');


describe("mock/spy test", function() {


    it("should not pass", function(done) {

        var theNewValue = "this is a mock, sucker!"

        var spy = spyOn(testModule2, 'doIt').andCallFake(function () {
            return theNewValue;
        });

        expect(testModule.testMethod()).toBe(theNewValue);

        done();
    });
});

testModule.js

var testModule2 = require('./testModule2');

exports.testMethod = function() {
    return testModule2.doIt();
};

testModule2.js

exports.doIt = function() {
    return "this is the real thing..";
};

testOutput.txt

mock/spy test
  should pass

Finished in 0.006 seconds
1 test, 1 assertion, 0 failures