[Solved] Why does this test fail?component.title = 'Test'; const text = fixture.nativeElement.querySelector('h1').textContent; expect(text).toBe('Test');Template: <h1>{{ title }}</h1> | Angular

Angular - Testing

Why does this test fail?

component.title = 'Test';
const text = fixture.nativeElement.querySelector('h1').textContent;
expect(text).toBe('Test');

Template: <h1>{{ title }}</h1>

Afixture.detectChanges() was not called after setting title

BQuery selector is incorrect

Ctitle property is private

DtextContent cannot be used in tests

Step-by-Step Solution

Solution:

Step 1: Check if template updates after property change
Without calling fixture.detectChanges(), Angular does not update the template bindings.
Step 2: Verify other options
Query selector 'h1' is correct, title can be public/private but accessible in test, textContent is valid.
Final Answer:
fixture.detectChanges() was not called after setting title -> Option A
Quick Check:
Always call detectChanges() after changing component properties [OK]

Quick Trick: Call fixture.detectChanges() after changing component properties [OK]

Common Mistakes:

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Why does this test fail?