Sinon can create a stub based on a constructor quite easily if, instead of mock, you use the createStubInstance method. An example using mocha, chai, sinon and sinon-chai, could look like this: import * as sinon from ‘sinon’; import * as chai from ‘chai’; // … imports for the classes under test const expect = … Read more
Just for understanding purpose call: FuncInfoCollector = is a Function that records arguments, return value, the value of this(context) and exception thrown (if any) for all of its calls. (this FuncInfoCollector is dummy name given by me, it is not present in SINON lib) Fake = FuncInfoCollector + can only create a fake function. To … Read more
Try this link.simulate(‘click’, { preventDefault: () => { } });
Sinon has a nice API for handling multiple calls (stub.onCall(n);) to the same stubbed method. Example from stub api doc: “test should stub method differently on consecutive calls”: function () { var callback = sinon.stub(); callback.onCall(0).returns(1); callback.onCall(1).returns(2); callback.returns(3); callback(); // Returns 1 callback(); // Returns 2 callback(); // All following calls return 3 } You … Read more
You can use sinon to stub isAuthenticated method, but you should do that before a reference to auth.isAuthenticated is set as a middleware, so before you require the index.js and app is created. Most likely you would want this in a beforeEach hook: var app; var auth; beforeEach(function() { auth = require(‘../wherever/auth/auth.service’); sinon.stub(auth, ‘isAuthenticated’) .callsFake(function(req, … Read more
The stub supports all the methods of a spy. Just don’t create the spy.
I prefer mocha-sinon over “plain” sinon because it integrates nicely with Mocha. Example: var expect = require(‘chai’).expect; require(‘mocha-sinon’); // Function to test, can also be in another file and as long as it’s // being called through some public interface it should be testable. // If it’s not in any way exposed/exported, testing will be … Read more
With sinon, you can put a mock or stub around an entire module. For example, suppose the mysql module has a function query: var mock; mock = sinon.mock(require(‘mysql’)) mock.expects(‘query’).with(queryString, queryParams).yields(null, rows); queryString, queryParams are the input you expect. rows is the output you expect. When your class under test now require mysql and calls the … Read more
This question was asked a while back but may still be interesting, especially for people who are new to sinon. this.spied.reset() is not needed as Obj.prototype.spiedMethod.restore(); removes the spy. Update 2018-03-22: As pointed out in some of the comments below my answer, stub.reset will do two things: Remove the stub behaviour Remove the stub history … Read more
I have been writing Typescript tests using qUnit and Sinon, and I have experienced exactly the same pain you are describing. Let’s assume you have a dependency on an interface like: interface IDependency { a(): void; b(): boolean; } I have managed to avoid the need of additional tools/libraries by using a couple of approaches … Read more