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You have three modules: A returns a list of numbers, B filters out even numbers, and C sums the remaining numbers. How would you write an integration test to verify the final sum?

hard🚀 Application Q8 of Q15

Testing Fundamentals - Testing Types and Levels

You have three modules: A returns a list of numbers, B filters out even numbers, and C sums the remaining numbers. How would you write an integration test to verify the final sum?

ATest each module separately without combining outputs.

BPass the list from A to B, then B's output to C, and check if sum matches expected.

COnly test module C with a fixed input.

DSkip testing module B and combine A and C outputs.

Step-by-Step Solution

Solution:

Step 1: Understand module flow
Module A outputs list, B filters evens, C sums filtered list.
Step 2: Design integration test
Pass output from A to B, then B to C, verify final sum matches expected result.
Final Answer:
Pass the list from A to B, then B's output to C, and check if sum matches expected. -> Option B
Quick Check:
Integration test = Chain outputs and verify final result [OK]

Quick Trick: Chain module outputs stepwise to test integration [OK]

Common Mistakes:

MISTAKES

Testing modules in isolation only
Skipping intermediate module outputs

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