Re-enable incline contact force test

[camevor]

Description

After the mjwarp upgrade in #2245, this resolves #2239.

Checklist

• New or existing tests cover these changes
• The documentation is up to date with these changes
• CHANGELOG.md has been updated (if user-facing change)

Summary by CodeRabbit

• Tests
  • Re-enabled a previously skipped test to run on continuous integration, improving test coverage verification.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yml

Review profile: CHILL

Plan: Pro

Run ID: 96385d08-6153-48bd-824c-4a6c018496d1

📥 Commits

Reviewing files that changed from the base of the PR and between 89d07fb and ede198b.

📒 Files selected for processing (1)

• newton/tests/test_mujoco_solver.py

💤 Files with no reviewable changes (1)

• newton/tests/test_mujoco_solver.py

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📝 Walkthrough

Walkthrough

Removed the skip decorator from test_contact_forces_on_incline test, re-enabling its execution on CI after being previously disabled due to intermittent failures documented in issue #2239.

Changes

Cohort / File(s)	Summary
Test Skip Decorator Removal newton/tests/test_mujoco_solver.py	Removed @unittest.skip("Flaky on CI, see GH-2239") decorator from test_contact_forces_on_incline, allowing the test to run on CI instead of being skipped.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The PR re-enables the test as stated but does not address the root cause (flaky behavior). Issue #2239 proposes multiple solutions including increased settling time, diagnostic logging, relaxed tolerance, or retry logic—none are implemented.	Implement one of the proposed mitigations from #2239 (increase settling time, add retry logic, or diagnose the flakiness) before re-enabling the test to prevent CI failures.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: removing the skip decorator to re-enable the previously disabled test.
Out of Scope Changes check	✅ Passed	The change is narrowly scoped to removing the skip decorator from one test, which aligns with the PR objective to re-enable the test.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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