In a microservices system with 10 services, you want to run end-to-end tests daily. Which approach best balances test reliability and speed?

hard📝 Trade-off Q15 of 15

Microservices - Testing Microservices

ARun a subset of critical end-to-end tests daily and full tests weekly

BSkip end-to-end tests and rely only on unit tests

CRun all tests in parallel with full production-like environment for each

DRun tests only on developer machines before deployment

Step-by-Step Solution

Solution:

Step 1: Consider test environment and time constraints
Running all tests daily with full environments is slow and costly.
Step 2: Evaluate options for balance
Running critical tests daily and full tests weekly balances speed and coverage.
Step 3: Reject options that reduce coverage or delay testing
Skipping tests or limiting to dev machines risks missing issues.
Final Answer:
Run a subset of critical end-to-end tests daily and full tests weekly -> Option A
Quick Check:
Balanced testing = subset daily + full weekly [OK]

Quick Trick: Run critical tests daily, full tests less often [OK]

Common Mistakes:

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