Add unit tests for operation handlers

[eclipse0922]

Pull Request

Summary

Add unit tests for OperationHandlers and register the new gateway test target/dependencies. The new coverage exercises service and action execution paths, validation failures, and not-found responses for issue #181.

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Issue

Link the related issue (required):

• closes Add unit tests for OperationHandlers #181

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Type

• Bug fix
• New feature or tests
• Breaking change
• Documentation only

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Testing

Tested in Docker using ros:jazzy-ros-base.

• colcon build --packages-up-to ros2_medkit_gateway --build-base /tmp/colcon/build --install-base /tmp/colcon/install --event-handlers console_direct+ --cmake-args -DBUILD_TESTING=ON
• colcon test --packages-select ros2_medkit_gateway --build-base /tmp/colcon/build --install-base /tmp/colcon/install --event-handlers console_direct+ --return-code-on-test-failure
• colcon test-result --test-result-base /tmp/colcon/build --verbose

Result: ros2_medkit_gateway 57/57 passed, including test_operation_handlers 12/12.

Note: a workspace-wide colcon build attempt in the same image hit an unrelated GCC 13 internal compiler error while building ros2_medkit_linux_introspection.

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Checklist

• Breaking changes are clearly described (and announced in docs / changelog if needed) - no breaking changes in this PR
• Tests were added or updated if needed
• Docs were updated if behavior or public API changed - not needed for this test-only change

[Copilot]

Pull request overview

Adds a new GTest suite for OperationHandlers in ros2_medkit_gateway, exercising service/action execution paths and key error responses related to issue #181, and wires the new test target into the gateway’s CMake test configuration.

Changes:

• Added test_operation_handlers.cpp covering operation listing, operation metadata lookup, execution lifecycle (create/list/get/update/cancel), and validation/not-found cases.
• Updated ros2_medkit_gateway CMake to build/link/register the new test_operation_handlers target and add required dependencies.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 9 comments.

File	Description
src/ros2_medkit_gateway/test/test_operation_handlers.cpp	New unit tests for OperationHandlers (service + action paths, validation failures, and not-found handling).
src/ros2_medkit_gateway/CMakeLists.txt	Registers the new gtest target, adds dependencies, and assigns a ROS_DOMAIN_ID for isolation.

[bburda]

LGTM!