How can Protractor be used to test content before Angular is fully loaded?

In my opinion, it's crucial to notify users when an Angular-based application is loading. For instance, in the case of Angular 2, you could use something like 

<view>Loading...</view>
. I'm confident that there must be a similar method for AngularJS (v1) as well. Therefore, I believe it's important to utilize Protractor to test this aspect of the application since it serves as "an end-to-end test framework for AngularJS applications."

I was advised that there might be a solution and encouraged to seek help here. Can someone assist me in finding the approach that Nick had in mind? It doesn't necessarily have to be compatible with Angular 2 at this moment. An AngularJS (v1) solution would suffice, as I anticipate it will be migrated once Protractor supports Angular 2.

This issue appears to be akin to the question posed in Protractor: test loading state, but unlike the original poster, my goal is to ensure that the Angular application isn't fully loaded before the test completes, which leads me to believe that there may be a way to pause or halt the loading process (though I could be mistaken).

angularjstestingprotractore2e-testing

Answer №1

Personally, I tend to steer clear of testing scenarios like this because they often prove to be unreliable. Unless there is a specific mandate for testing the loader, I would opt not to do so.

An alternative approach could be utilizing 

browser.ignoreSynchronization = true
to bypass waiting for angular to load on the page, allowing you to verify that your loader is present.

The downside to this method is the challenge of guaranteeing that angular has not loaded. It becomes tricky to prevent your angular application from bootstrapping without implementing manual delays or "no-bootstrap" triggers, which could potentially compromise the integrity of your application just for the sake of testing a loading state.

Answer №2

In addition to @Nick's point, it is important to disable the synchronization between protractor and angular by setting 

browser.ignoreSynchronization = true;
.

Furthermore, you should implement an explicit wait to ensure that the loading indicator (such as a spinner image) becomes visible:

var EC = protractor.ExpectedConditions;
browser.wait(EC.visibilityOf(element(by.id("#loading"))), 5000, "Loading indicator has not become visible");

If there is a timeout error, it means that the loading element (in this case, the element with id="loading") did not become visible within 5 seconds.

Remember to re-enable synchronization once the test is complete:

browser.ignoreSynchronization = false;

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