The concept of mock doesn't exist in Jasmine. spyOnProperty (component, 'isEnabled', 'get').and.returnValue (true); component.onClick (); expect (component.funcA).toHaveBeenCalled (); I would expect this to pass. (" Testing UI with . Testing DOM Events Using jQuery and Jasmine 2.0 - HTML Goodies The steps would be: implement a mock service having the shape of the original and allowing control over its behavior and responses using Jasmine APIs; design what an automated spy-creator (autoSpy) function would return; implement the autoSpy; augment implementation to use conditional types for working . Source Url How to mock a function with Jasmine? Jasmine can be . Then when the test is done, we call jasmine.clock ().uninstall () to remove the mock clock. An Introduction to Jasmine Unit Testing - freeCodeCamp.org I use Jasmine to mock a lot of AngularJS services that return promises. Jasmine unit testing: Don't forget to callThrough ... - Federico Hatoum Angular + Jasmine: How to ignore/ mock one function in the tested ... test = createSpy().and.callFake(test); The second more verbose, more explicit, and "cleaner": test = createSpy('testSpy', test).and.callThrough(); -> jasmine source code to see the second argument Unit Testing Async Calls and Promises with Jasmine - Medium Hugoren Martinako I would like to mock a function. A spy can stub any function and tracks calls to it and all arguments. Next assert check for the mock object is defined. The add-on library that we'll be using is built on Jasmine 2.0 and jQuery and is called jasmine-jquery. Overwriting Mocks in Jasmine - Bambielli's Blog Because myObjs is undefined, obviously. Any ideas are appreciated unit test: With JavaScript, we can create a time-dependent program/code and execute it at a specified time or time intervals using the setTimeout () and setInterval () methods. Web UI end-to-end tests with Protractor. Typescript mock interface and async promise example When I was replicating this test for the purpose of this blog post, I figured out that I was actually using Jasmine as it is the default test suite used when creating new Ionic Angular applications . jasmine API has a spyon to mock the methods with an instance of a class or a class itself. They are extremely useful for testing and should be part of every unit test writer's tool set. You can use spyOn to mock the methods. In Jasmine, mocks are referred as spies that allow you to retrieve certain information on the spied function such as: The arguments passed to the function What value the function returns How many. This was useful for testing methods that rely on a timeout or debounce before firing. Similar to Karma, it's also the recommended testing framework within the Angular documentation as it's setup for you with the Angular CLI. . But, since a constructor for a JS object is just another function, we can mock this out in much the same way. Spy on JavaScript Methods Using the Jasmine Testing Framework