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You want to test a microservice that depends on two other services. Which approach best ensures reliable integration testing?

hard📝 Trade-off Q8 of 15
Microservices - Testing Microservices
You want to test a microservice that depends on two other services. Which approach best ensures reliable integration testing?
ARun all three services in a test environment and test real interactions
BSkip integration tests and rely on unit tests only
CTest only the main service and trust dependencies work
DUse mocks for both dependent services to isolate the test
Step-by-Step Solution
Solution:
  1. Step 1: Understand integration test purpose

    Integration tests verify real interactions between services, not isolated mocks.
  2. Step 2: Evaluate options for reliability

    Running all services in a test environment ensures actual communication and data flow.
  3. Final Answer:

    Run all three services in a test environment and test real interactions -> Option A
  4. Quick Check:

    Real service interaction = Reliable integration test [OK]
Quick Trick: Test real service interactions for reliable integration tests [OK]
Common Mistakes:
  • Overusing mocks in integration tests
  • Skipping integration tests entirely
  • Assuming unit tests cover integration

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