[test] Add unit tests for RoutingProblem.get_power

[adity1raut]

Related Issue / Discussion:

Relates to discussion [Improve Test Framework – GSoC 2025 Code Challenge]

Changes:

• New tests/test_routing_problem_get_power.py

Further Details:

Summary:

Before: RoutingProblem.get_power and RoutingProblem._evaluate in
WeatherRoutingTool/algorithms/genetic/problem.py had zero test coverage.

After: 13 unit tests covering all methods of RoutingProblem grouped
into pytest classes, achieving 100% line coverage (34/34 statements).

Classes and tests added:

Class	Tests
TestRoutingProblemInit	boat_speed_from_arrival_time flag set correctly for fixed speed and arrival-time modes
TestGetPowerFixedSpeed	return type, scalar fuel, positive fuel, shipparams returned, reproducibility, longer route consumes more fuel
TestGetPowerArrivalTime	return type, positive fuel when speed is derived from arrival time
TestEvaluate	out['F'] and out['G'] populated, out['F'] positive, out['G'] zero when no constraint violations

_evaluate is tested with unittest.mock.patch to isolate it from
get_constraints, which requires loaded constraint data not available
in the unit test environment.

Dependencies:

No new dependencies. unittest.mock is part of the Python standard library.

PR Checklist:

In the context of this PR, I:

• have (already previously) filled the 52North Contributor License Agreement and received positive feedback on this matter
• have filled the 52North Contributor License Agreement and am waiting for feedback
• provide unit tests embedded in the WRT test framework (WeatherRoutingTool/tests) that allow the simple testing of the new/modified functionalities. All (previous and new) unit tests execute without new error messages.
• ensure that the code formatter runs without errors/warnings
• ensure that my changes follow the WRT’s guidelines for contributing at the time of the contribution

Please consider that PRs which do not meet the requirements specified in the checklist will not be evaluated. Also, PRs with no activities will be closed after a reasonable amount of time.

[kdemmich]

Hi @adity1raut, thank you for your PR. We appreciate the time and effort that was put into it. Please be aware that we require to follow 52 North's CLA guidelines for all PRs and, in particular, fill the 52°North Contributor License Agreement. As long as this has not been filled, I can not assign you to any issues or merge any PRs. Please don't hesitate to contact me in case of related questions.

[adity1raut]

Hi @adity1raut, thank you for your PR. We appreciate the time and effort that was put into it. Please be aware that we require to follow 52 North's CLA guidelines for all PRs and, in particular, fill the 52°North Contributor License Agreement. As long as this has not been filled, I can not assign you to any issues or merge any PRs. Please don't hesitate to contact me in case of related questions.

Hi, thank you for the clarification. I have now completed the 52°North Contributor License Agreement. Please let me know if anything else is required from my side.