How to fix Jasmine unit test can’t read undefined property?
So in your controller, response.data = {name: ‘Umair’} and that object doesn’t have a child named children. To fix this, for dummyData, try to mimic the real data a bit more.
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How to avoid common errors in your Jasmine test suite?
Well, we have some bugs: “Type error: Cannot read property ‘All’ of undefined.” We don’t have a model yet, so let’s create one:
How to test the property of an undefined object?
If only the status code wasn’t defined, you’d get the error you want. You could also do a precursor check, something like: There’s not much jasmine can do on her own in this situation, so I’m going to close this. Thanks for using Jasmine!
Why is the error message unable to read property ‘instance component’ undefined?
The error message Cannot read property ‘componentInstance’ of undefined made me focus on This was not the case, my Modal mock spyMatDialog was mocked incorrectly! The following code shows how the spyMatDialog was successfully mocked: Thanks for contributing an answer to Stack Overflow! Please make sure you answer the question.
Why can’t TypeError read property ‘nativeelement’?
In short, when you use OnPush in the component, let the constructor’s ChangeDetectorRef be public. In the test, when a component’s member changes, do component.changeDetector.detectChanges() . I am using the above code and getting the same error. i.e. typeerror cannot read the ‘nativeelement’ property of null.
When to get uncaught type error that can’t read property?
Uncaught TypeError: Cannot read property ‘querySelector’ of null. You get this error when you try to access a member (method/property) of an object that is null. The solution would be validating null values before accessing the functions on it. but you’ll just have to trace the code to find why the object is null in the first place.
Why is my native element not readable in Jasmine?
I’m sending a… If you have an *ngIf on an element, you can’t get the element via -> fixture.debugElement.query (By.css(‘.welcome’)); I’m even setting the welcome value in the beforeEach() method and it still won’t resolve to true in *ngIf=”welcome”
How to run unit test in Angular Jasmine?
When your test runs, $httpBackend actually intercepts the $http.get call and assigns dummyData to the response as you noted in This mock behavior allows your unit tests to complete quickly without relying on reddit being accessible from your machine. Test.
How to test “cannot read children of undefined”?
You can’t read ‘Children’ from indefinite. From the image I have attached with the response data, children is the array. When your test runs, $httpBackend actually intercepts the $http.get call and assigns dummyData to the response as you stated in
When does *ngif destroy the Dom element?
According to the docs, *ngIf destroys the DOM element, if the expression evaluates to false. This comment has been minimized. All, if you use component change detection OnPush, see this old issue #12313. In short, when you use OnPush in the component, let the constructor’s ChangeDetectorRef be public.
Why do I keep getting the Jasmine/Karma error?
I’m trying to create a coverage of the entire line (Jasmine/Karma), but I get the error Cannot read property ‘search’ of undefined. Here is my code for the component code.
When to call resetcompanies in angular-jasmine?
Since your find method has an if statement, we can write at least two unit tests. This is for the case when there is no search tag; we expect resetCompanies to be called if we have empty searchCompany:
Is there a bug that it can’t read the property pipe from undefined?
However this has broken my unit tests as I have introduced additional logic and now I am getting TypeError: Unable to read property ‘pipe’ of undefined. I’ve added piping to my jasmine.createSpyObj, however I’m not sure how to progress.