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042. CI/CD - Launch Testing

Difficulty: 🔴 Hard
Category: Integration Testing
Tags:
Execution Type: launch_file

💡 Why This Problem Matters

Manual testing is unscalable. Launch tests run automatically on every Pull Request to ensure new code doesn't break existing simulations or hardware drivers.

Problem Statement

Problem Statement

Write a launch_testing script to verify that a node starts up and publishes data correctly. This is unit testing for entire processes.

Requirements

  • Create a test file test_launch.py
  • Define generate_test_description
  • Start a talker node
  • Use unittest to verify it publishes to /chatter (or just check process exit code for this exercise)

Input/Output Format

Output:

  • A passing test execution.

⚠️ Common Pitfalls

  • Not giving the process enough time to start before asserting.

📚 Helpful Resources

Test Cases

  • Launch test: launch_testing used
  • Multi-node test: Multiple nodes tested
  • Post-shutdown: Exit codes checked

Contributing

Found an issue with this problem's description, or have a better hint?
Open a PR or report it in Discussions.

Note: TestScripts and reference solutions are maintained by the SimuCode team
and are not part of this open spec. This ensures grading integrity on simucode.online.