You need to test an Angular service that makes HTTP requests to an API. You want to ensure your tests are isolated and do not actually make HTTP calls. What approach would you take?
- Creating a Custom Testing Library for HTTP Mocking
- Mocking HTTP Requests using HttpClientTestingModule
- Performing Real HTTP Calls with HttpClient
- Using Angular's TestBed for Service Testing
To isolate tests and avoid making actual HTTP calls, you should use Mocking HTTP Requests using HttpClientTestingModule to mock the HTTP responses.
When debugging Protractor tests, you can insert a call to _____ to pause the test execution.
- browser.breakpoint()
- browser.debugger()
- browser.hold()
- browser.pause()
For debugging Protractor tests, you can insert a call to browser.pause() to pause test execution at that point.
The Ivy Renderer introduces a new concept called _____ which is designed to be more efficient in updating the DOM.
- Change Detection
- Render Optimization
- Template Engine
- Virtual DOM
The Ivy Renderer introduces a new concept called Render Optimization, designed to be more efficient in updating the DOM. This improves performance by optimizing how changes are applied to the view.
When using NgRx, how can you prevent unnecessary re-rendering of components when the state changes?
- Use ChangeDetectionStrategy.OnPush
- Use ChangeDetectorRef.markForCheck
- Use pure pipes
- Use the async pipe
In NgRx, you can prevent unnecessary re-rendering of components by using ChangeDetectionStrategy.OnPush to only update components when necessary.
If a pipe takes multiple input values, how should it be tested to ensure all cases are covered?
- Rely on integration tests to cover all possible input combinations
- Skip testing for cases with complex input values
- Use a single test case with multiple input values and expected results
- Write separate test cases for each combination of input values
To ensure all cases are covered when testing a pipe with multiple input values, you should write separate test cases for each combination of input values.
To submit a form in Angular, you typically bind the submit event to a method in your component class using _____ .
- formAction
- formSubmit
- ngSubmit
- submitForm
To submit a form in Angular, you typically bind the submit event to a method in your component class using ngSubmit.
How can you pass data to a Route Guard in Angular?
- Direct function argument
- Query parameters
- Router configuration
- Shared service
In Angular, you can pass data to a Route Guard by using a Shared service to store and share data between components and guards.
When a service is provided at the root level, it is available throughout the entire _____.
- application
- application module
- component
- module
When a service is provided at the root level, it is available throughout the entire application.
You are building an admin panel where certain routes should only be activated if the user has the required permissions. How can you utilize Route Resolvers to ensure that the data indicating permission is fetched before navigation?
- Implement an Angular Service to fetch data
- Include a custom Angular directive
- Use a Route Resolver
- Utilize Route Guards
To ensure that data indicating permissions is fetched before navigation, you can utilize a Route Resolver. The resolver can fetch the required data and halt route activation until the data is available and evaluated for permissions.
In Angular, a service is typically injected into a component's constructor through the component's _____.
- constructor
- ngInject
- ngOnChanges
- ngOnInit
In Angular, a service is typically injected into a component's constructor through the component's constructor.