Unit Testing
1 - Asynchronous Javascript Styles
2 - Promises and Async/Await in CC2
3 - fakeAsync() vs async() vs waitForAsync() + tick() in BYOD
4 - setTimeout() and $timeout and jasmine.clock()
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Things that make testing more difficult
SpiesAsynchronous code Dependencies / Mocks Dates / Timezones JS Frameworks / 3rd Party Libraries The DOM
Async things
1 - Non-promises setTimeout(), $timeout, alert() 2 - Promises using .then() chaining 3 - Async/Await promises
4 - RxJs (Observables) 5 - $q.defer() (AngularJS's promise library before promises were main stream)
jasmine.clock()
using jasmine clock for setTimeout()
.tick() is part of jasmine.clock()??? Could waitForAsync() and fakeAsync() be a wrapper on jasmine.clock() ????
jasmine.clock().install();
let value = controller.myFunction();
jasmine.clock().tick(2000);
expect(value).toBe("not undefined");
jasmine.clock().uninstall();Testing Async
// Typescript
public async saveCarePlan(): Promise<void> {
try {
await this.handleModuleInfoSave(moduleInfo, patient);
await this.handleMedicationsSave();
} catch(error) {
// if any trouble saving module info or medications a failure message to display
this.NotifyService.danger(this.$translate.instant('careplan.metrics.error'));
}
}
it('should call show danger message if an error', (done) => {
spyOn(controller, "preSaveCheckForPCVPhone").and.returnValue(Promise.resolve());
spyOn(controller, "handleModuleInfoSave").and.returnValue(Promise.resolve());
spyOn(controller, "handleMedicationsSave").and.returnValue(Promise.reject());
// handleMedicationSave returning a rejected promise will result in an error, landing in the catch block, resulting in the danger message
let notifyDangerSpy = spyOn(NotifyService, "danger");
controller.saveCarePlan()
.then(() => {
expect(notifyDangerSpy).toHaveBeenCalled();
done();
});
});Promises with .then()
jasmine.any(Date)
// 1 - Date
expect(new Date()).toEqual(jasmine.any(Date)); // PASSES
let newMomentDate = moment().toDate();
expect(newMomentDate).toEqual(jasmine.any(Date)); // PASSESUnit Testing Part 2, Async
By Rich Finelli
