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🧪 Add unit tests for hydrogen_coupled_saw_propulsion in QAG-recordpropulsuon.pynb#2

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🧪 Add unit tests for hydrogen_coupled_saw_propulsion in QAG-recordpropulsuon.pynb#2
Sir-Ripley wants to merge 1 commit intomainfrom
testing-improvement-hydrogen-saw-5604623442296693629

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@Sir-Ripley Sir-Ripley commented Mar 14, 2026

🎯 What: Add unit tests for the hydrogen_coupled_saw_propulsion function in the QAG-recordpropulsuon.pynb notebook.
📊 Coverage: The new tests cover scalar inputs, array-based inputs (ensuring vectorization), and exact mathematical validation for key time points.
Result: Enhanced reliability and coverage for the core propulsion simulation formula, providing a safety net for future changes.


PR created automatically by Jules for task 5604623442296693629 started by @Sir-Ripley

Summary by Sourcery

Tests:

  • Add unit tests validating hydrogen_coupled_saw_propulsion for scalar, vectorized, and analytically checkable time inputs.

Added a dedicated UNIT TESTS code cell at the end of QAG-recordpropulsuon.pynb to verify the correctness of the hydrogen_coupled_saw_propulsion function. The tests cover:
- Scalar/single-element array inputs (e.g., verifying t=0 result).
- Vectorized array inputs (verifying output length).
- Mathematical accuracy against known reference values calculated from the function's constants (mass=5400, freq=0.70).

This improvement ensures the stability of the core mathematical formula for future refactoring.

Co-authored-by: Sir-Ripley <31619989+Sir-Ripley@users.noreply.github.com>
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sourcery-ai bot commented Mar 14, 2026

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds unit tests within QAG-recordpropulsuon.pynb to validate the hydrogen_coupled_saw_propulsion function for scalar and array inputs, including checks against expected mathematical values at selected time points.

File-Level Changes

Change Details Files
Introduce unit-style tests for hydrogen_coupled_saw_propulsion directly in the notebook to validate scalar, vectorized array behavior, and correctness at key time points.
  • Add test cells that call hydrogen_coupled_saw_propulsion with scalar inputs and assert expected outputs.
  • Add test cells that exercise vectorized/array inputs to confirm correct broadcasting and shape handling.
  • Add assertions or reference calculations to verify numerical correctness of the propulsion formula at several key time points.
  • Optionally organize tests into clearly labeled sections or helper functions to make rerunning and extending tests straightforward.
QAG-recordpropulsuon.pynb

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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new set of unit tests for the hydrogen_coupled_saw_propulsion function within the QAG-recordpropulsuon.pynb notebook. The primary goal is to enhance the reliability and robustness of this core propulsion simulation formula by validating its behavior across various input types and against known mathematical expectations. This addition provides a crucial safety net, safeguarding against regressions and ensuring the continued accuracy of the simulation.

Highlights

  • Unit Test Addition: Added comprehensive unit tests for the hydrogen_coupled_saw_propulsion function within the Jupyter notebook.
  • Input Coverage: The new tests cover both scalar and array-based inputs, ensuring the function handles vectorized operations correctly.
  • Mathematical Validation: Included exact mathematical validation for key time points to verify the accuracy of the propulsion simulation formula.

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Changelog
  • QAG-recordpropulsuon.pynb
    • Added a new code cell containing unit tests for the hydrogen_coupled_saw_propulsion function.
Activity
  • Pull request was automatically created by Jules for a task initiated by @Sir-Ripley.
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Code Review

This pull request adds valuable unit tests for the hydrogen_coupled_saw_propulsion function, covering several important cases. My review includes suggestions to improve the robustness and maintainability of these tests. Specifically, I've pointed out that one of the tests re-implements the function logic, which is a testing anti-pattern. I've suggested using a pre-calculated value instead. I've also recommended structuring the tests into separate functions for better test isolation, which would make the test suite more effective at catching regressions.

Comment on lines +676 to +704
"def test_hydrogen_coupled_saw_propulsion():\n",
" print(\"Running UNIT TESTS for hydrogen_coupled_saw_propulsion...\")\n",
" \n",
" # Test scalar input (or single element array)\n",
" t_single = np.array([0.0])\n",
" res_single = hydrogen_coupled_saw_propulsion(t_single)\n",
" # sin(0) is 0, so result should be 0\n",
" assert np.isclose(res_single[0], 0.0), f\"Expected 0.0 at t=0, got {res_single[0]}\"\n",
" \n",
" # Test array input\n",
" t_arr = np.linspace(0, 10, 100)\n",
" res_arr = hydrogen_coupled_saw_propulsion(t_arr)\n",
" assert len(res_arr) == 100, \"Result array length mismatch\"\n",
" \n",
" # Test known value calculation\n",
" # psychon_mass_ug = 5400\n",
" # golden_freq_mhz = 0.70\n",
" # omega = 2 * np.pi * 0.70\n",
" # t = 1.0\n",
" # expected = 5400 * np.sin(omega * 1.0) * np.exp(0.05 * 1.0)\n",
" t_val = np.array([1.0])\n",
" res_val = hydrogen_coupled_saw_propulsion(t_val)\n",
" expected_val = 5400 * np.sin(2 * np.pi * 0.70 * 1.0) * np.exp(0.05 * 1.0)\n",
" assert np.isclose(res_val[0], expected_val), f\"Value mismatch at t=1.0: {res_val[0]} != {expected_val}\"\n",
" \n",
" print(\"ALL UNIT TESTS PASSED!\")\n",
"\n",
"if __name__ == \"__main__\":\n",
" test_hydrogen_coupled_saw_propulsion()"
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medium

Placing multiple independent tests within a single test function can be problematic. If an early assertion fails, the rest of the function is skipped, and subsequent tests are not executed. This can mask other failures. To improve test isolation and ensure all cases are checked, it's better to separate each logical test into its own function (e.g., test_zero_input, test_vectorization, test_known_value). Using a framework like pytest would automatically discover and run these separate tests, providing a more complete picture of the function's correctness.

Comment on lines +698 to +699
" expected_val = 5400 * np.sin(2 * np.pi * 0.70 * 1.0) * np.exp(0.05 * 1.0)\n",
" assert np.isclose(res_val[0], expected_val), f\"Value mismatch at t=1.0: {res_val[0]} != {expected_val}\"\n",
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medium

The test for a known value currently re-implements the logic from the hydrogen_coupled_saw_propulsion function. This is a testing anti-pattern, as a logical error in the original function could be replicated in the test, causing the test to pass incorrectly. It also duplicates magic numbers (5400, 0.70, 0.05), which makes the code harder to maintain. Tests are more robust when they validate against a pre-calculated, known-good value. This ensures the test is independent of the implementation.

    expected_val = -4590.54080255  # Pre-calculated value for t=1.0
    assert np.isclose(res_val[0], expected_val), f"Value mismatch at t=1.0: got {res_val[0]}, expected {expected_val}"

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