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Which Angular testing utility allows you to query elements by CSS selectors within a fixture?

easy📝 Conceptual Q2 of 15
Angular - Testing
Which Angular testing utility allows you to query elements by CSS selectors within a fixture?
Afixture.debugElement.query(By.css())
Bfixture.nativeElement.querySelectorAll()
CcomponentInstance.querySelector()
DTestBed.querySelector()
Step-by-Step Solution
Solution:

  1. Step 1: Identify querying methods in Angular tests

    fixture.debugElement provides methods to query elements using Angular's By selectors.

  2. Step 2: Using By.css()

    By.css() is the standard way to select elements by CSS selectors inside debugElement.

  3. Final Answer:

    fixture.debugElement.query(By.css()) -> Option A

  4. Quick Check:

    Query elements in fixture = debugElement.query(By.css()) [OK]
Quick Trick: Use debugElement.query with By.css for CSS selectors [OK]
Common Mistakes:
  • Using nativeElement directly for queries
  • Trying to query on component instance
  • Using TestBed for element queries

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