Creating a simulated RESTful backend using Sinon.js for an Angular.js project

In the process of developing my Angular.js application, I am incorporating RESTful services that utilize the $resource service. While this app will eventually connect to a Java Spring application, I am currently focusing on creating an isolated mock server on the client side to serve all necessary routes for testing purposes. Previously, I have successfully used Sinon.js to craft fake servers for other apps built with different MV* frameworks like Backbone.js.

It seems that Angular handles XHR requests differently compared to "standard" ajax calls utilized by JQuery/Backbone, making it challenging for Sinon to intercept and respond from the client side.

Although I attempted to use $httpBackend to simulate routes with predefined data, it seems this tool is primarily intended for unit testing rather than setting up a "staging environment" as needed in my case.

Here is how my current Sinon setup looks like, which effectively works with JQuery.ajax but struggles with Angular $resource or $http:

var server = sinon.fakeServer.create();
server.respondWith("GET", /mydata/gi, [200,
    { "Content-Type": "application/json" },
    JSON.stringify({
        data: "myData"
    })
]);
server.autoRespond = true;

If anyone has insights into why this approach doesn't seamlessly integrate with Angular, or better yet, suggestions on setting up mocks for Angular applications, I would greatly appreciate the guidance!

Answer №1

If you're searching for a solution, the e2e $httpBackend mock in AngularJS might be just what you need.

In the documentation, it states: "For a fake HTTP backend implementation suited for end-to-end testing or development without a backend, check out the e2e $httpBackend mock."

Unlike unit testing, in scenarios like end-to-end testing or when using a mock instead of a real backend API during development, there are situations where certain requests should bypass the mock and send a real HTTP request (for example, to retrieve templates or static files from the webserver).

I came across an insightful article that discusses clever ways to utilize the fake backend in Angular.

Answer №2

Setting up a full stub REST server using sinon.js or $httpBackend can be quite troublesome. My recommendation would be to try FakeRest, a fake REST server that is created on top of sinon.js.

https://github.com/marmelab/FakeRest

Just to note: we are the creators of this tool.

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