Add a modifier requires_rti to cut down duplicated code in unit tests

[mingxin-zheng]

Fixes #32

Description

Add the modifier @requires_rti so that we don't need to duplicate the following snippet

try:
    RTI_AVAILABLE = bool(find_spec("rti.connextdds"))
    if RTI_AVAILABLE:
        license_path = os.getenv("RTI_LICENSE_FILE")
        RTI_AVAILABLE = bool(license_path and os.path.exists(license_path))
except ImportError:
    RTI_AVAILABLE = False

[Nic-Ma]

Other tests also have the RTI logic, please search it, for example:
https://github.com/isaac-for-healthcare/i4h-workflows/blob/main/workflows/robotic_ultrasound/tests/test_simulation/test_ultrasound.py
and
https://github.com/isaac-for-healthcare/i4h-workflows/blob/main/workflows/robotic_ultrasound/tests/test_simulation/test_sim_with_dds.py

Thanks.

[mingxin-zheng]

pr83.log

test log after refractor

[Copilot]

Pull Request Overview

This PR introduces a new decorator, @requires_rti, to remove duplicated RTI availability checks from our unit tests. The changes replace the inline try/except blocks and skipUnless decorators with a single, reusable decorator imported from helpers.py.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
workflows/robotic_ultrasound/tests/test_utils/test_visualization.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_ultrasound.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_target.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_sim_with_dds.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_franka.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_camera.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_simulation/test_base.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_policy_runner/test_pi0.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_holoscan_apps/test_realsense_camera.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_dds/test_subscriber.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/test_dds/test_publisher.py	Replaced inline RTI check with @requires_rti
workflows/robotic_ultrasound/tests/helpers.py	Added the helper decorator to encapsulate RTI checks

Comments suppressed due to low confidence (1)

workflows/robotic_ultrasound/tests/helpers.py:20

• [nitpick] Consider caching the result of os.getenv('RTI_LICENSE_FILE') in a local variable to avoid calling it twice, improving readability and potentially performance.

def requires_rti(func):

[KumoLiu]

Thanks for the PR, LGTM.