Last month I released this postdetailing how you can unit test your JavaScript customisations for Dynamics 365.

In summary, xrm-mock is an npm package which you can install to mock the Xrm object in your client-side code. By mocking Xrm, you can write tests to assert the state of your CRM forms after JavaScript functions are called, such as onLoad() and onChange() for a field.

xrm-mock has been used across several projects both by myself and others, and has subsequently received some useful feedback. Namely:

"mocking Xrm is hard"

...and not to mention time consuming.

Enter: xrm-mock-generator. This project drastically reduces the time it takes to mock your CRM form's Xrm object. A usage guide is available on the project's GitHub page (link here), but here it is again:

  • Step 1: install via npm install xrm-mock-generator
  • Step 2: import var XrmMockGenerator = require("xrm-mock-generator");
  • Step 3: initialise a global Xrm object var Xrm = XrmMockGenerator.initialise();

You now have a global Xrmobject, as if you had loaded a form in CRM.

Here's an example:

This example showcases a contact form that changes the contact's firstname from Joe to Bob when the form is loaded.


(function () {
    "use strict";
    var Contact = () => {  };
    Contact.prototype.onLoad = function () {
    // node
    module.exports = new Contact();
    // browser
    global.Contact = new Contact();    


describe("Contact Form", () => {
    var XrmMockGenerator = require("xrm-mock-generator");
    var ContactForm = require("../src/contact.js");
    beforeEach(() => {
        XrmMockGenerator.createString("firstname", "Joe");
    describe("default", () => {
        expect(Xrm.Page.getAttribute("firstname").getValue()).toBe("Joe"); //true
    describe("onLoad", () => {
        expect(Xrm.Page.getAttribute("firstname").getValue()).toBe("Bob"); //true

You'll notice the line: XrmMockGenerator.createString("firstname", "Joe"); - that's how you add an attribute to Xrm. You can also add date attributes, option sets etc. which is all detailed on the GitHub usage guide.

The next primary goal of the project is to automate attribute metadata. That is: connect to a CRM organisation and automatically download the metadata for a form. If you feel like you can contribute or offer a suggestion, please message me on GitHub.