Posted almost 4 years ago. Visible to the public. Linked content.
Testing setTimeout and setInterval with Jasmine
Jasmine has a jasmine.clock() helper that you can use to travel through time and trigger setTimeout and setInterval callbacks:
CopybeforeEach(function() { timerCallback = jasmine.createSpy("timerCallback"); jasmine.clock().install(); }); afterEach(function() { jasmine.clock().uninstall(); }); it("causes a timeout to be called", function() { setTimeout(function() { timerCallback(); }, 100); expect(timerCallback).not.toHaveBeenCalled(); jasmine.clock().tick(101); expect(timerCallback).toHaveBeenCalled(); });
If you actually want the test to wait out the timer, your example function needs to accept a done argument, which you then call when the test is expected to finish:
Copyit("causes a timeout to be called", function(done) { setTimeout(function() { timerCallback(); }, 100); setTimeout(function() { expect(timerCallback).toHaveBeenCalled(); done(); }, 101); });
Needless to say the second test is much slower than the first test.
Once an application no longer requires constant development, it needs periodic maintenance for stable and secure operation. makandra offers monthly maintenance contracts that let you focus on your business while we make sure the lights stay on.
