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add-integration-test

Testing & Quality
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Write a Robot Framework integration test for thin-edge.io. Use when adding end-to-end tests.

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How to use this skill

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  3. Review the proposed files and risks before you approve installation.
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Source SKILL.md: https://github.com/thin-edge/thin-edge.io/blob/HEAD/.agents/skills/add-integration-test/SKILL.md

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Write Robot Framework Integration Test

Steps

  1. Create .robot file in tests/RobotFramework/tests/<category>/
  2. Add Settings section: 
    *** Settings ***
Resource    ../../resources/common.resource
Library     ThinEdgeIO
Library     Cumulocity  # For interacting with the device management from Cumulocity

Test Setup       Setup
Test Teardown    Get Logs
  3. Import Library Cumulocity while testing device integration with Cumulocity, like asserting telemetry or inventory data sent by the device to the cloud or to trigger device management operations from the device to the cloud
  4. Add test tags: 
    Test Tags    theme:<category>
  5. Write test cases: 
    *** Test Cases ***
My Test Case Description
    Execute Command    tedge mqtt pub te/device/main///m/test '{"value": 42}'
    # Use assertion keywords to verify behavior
  6. Run with: just integration-test --test PATTERN

Debug Test

  1. Identify the test container (simulating the tedge device) started by the test: docker ps -q --filter ancestor=debian-systemd | tail -n1
  2. There could be other test containers using the debian-systemd image, simulating child devices as well
  3. Execute shell commands on the test containers spawned by the test.
  4. Fetch service logs using journalctl:
    • C8Y mapper: journalctl -f -u tedge-mapper-c8y
    • Tedge agent: journalctl -f -u tedge-agent
    • Complete MQTT message trace: journalctl -f -u mqtt-logger

Notes

  • Device adapters: docker (CI default), ssh (remote devices), local (localhost)
  • Environment: .env file with cloud credentials (template at tests/RobotFramework/devdata/env.template)
  • Thin Edge specific test keywords are defined in tests/RobotFramework/libraries/ThinEdgeIO/ThinEdgeIO.py
  • Shared variables/resources in tests/RobotFramework/resources/common.resource

Reference Files

Read these for patterns:

  • tests/RobotFramework/tests/tedge_write.robot — simple test structure
  • tests/RobotFramework/tests/cumulocity/log/log_operation.robot — for interactions with Cumulocity
  • tests/RobotFramework/resources/common.resource — shared variables and resource setup
  • tests/RobotFramework/libraries/ThinEdgeIO/ThinEdgeIO.py — available keywords