Given this Angular test setup, what will component.getData() return if DataService is replaced by a mock returning 'mock data'?

medium📝 Predict Output Q4 of 15

Angular - Services and Dependency Injection

Given this Angular test setup, what will component.getData() return if DataService is replaced by a mock returning 'mock data'?

A'mock data'

B'real data'

Cundefined

DAn error is thrown

Step-by-Step Solution

Solution:

Step 1: Understand mock service injection
The mock service replaces the real one, so calls return mock values.
Step 2: Predict method output
Since mock returns 'mock data', component.getData() returns that string.
Final Answer:
'mock data' -> Option A
Quick Check:
Mock service output = B [OK]

Quick Trick: Mock services return their test data when injected [OK]

Common Mistakes:

MISTAKES

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