# Session Summary: 2026-01-25 Test Config Reorganization and Physics Test Coverage

## Changes Made

### Test Config Reorganization
- Moved all test configs from `tests/configs/` to `tests/`
- Renamed configs to use 1:1 mapping with test files (e.g., `test_NAME.toml`)
- Updated all test files to reference new config paths
- Removed unused configs: `earth_mars_simple.toml`, `simple_root_transition.toml`, `interplanetary_transfer.toml`
- Combined `earth_circular.toml` and `mars_circular.toml` into `test_orbital_period.toml`
- Duplicated `earth_circular.toml` content as `test_energy.toml`
- Removed first test case from `test_invalid_parent_assignment.cpp` (massive body parent validation)
- Deleted `tests/configs/` directory

### Physics Test Coverage Enhancement
- Added `vec3_dot` product test
- Added `vec3_cross` product test
- Added `calculate_acceleration` test
- Added `evaluate_acceleration` test
- Added `rk4_step` integration test
- All 11 functions in `src/physics.h` now have unit test coverage

## Commits

1. **reorganize test configs: 1:1 mapping with test files** (f79ae5a)
   - 23 files changed, 34 insertions(+), 225 deletions(-)
   - Net: -191 lines (removed 225, added 34)

2. **add test coverage for remaining physics.h functions** (11103af)
   - 1 file changed, 52 insertions(+)
   - Net: +52 lines

3. **Merge rename-configs to main** (fast-forward merge)

## Results

- **Total net change**: -139 lines (225 deleted, 86 added)
- All 32 test cases pass (239,348 assertions)
- Test files now have clear 1:1 config file naming convention
- Complete physics.h test coverage achieved

## Config Mapping (Final)

| Test File | Config File |
|-----------|-------------|
| test_energy.cpp | test_energy.toml |
| test_hyperbolic_orbit.cpp | test_hyperbolic_orbit.toml |
| test_invalid_parent_assignment.cpp | test_invalid_parent_assignment.toml |
| test_maneuver_planning.cpp | test_maneuver_planning.toml |
| test_maneuvers.cpp | test_maneuvers.toml |
| test_moon_orbits.cpp | test_moon_orbits.toml |
| test_orbital_period.cpp | test_orbital_period.toml |
| test_parabolic_orbit.cpp | test_parabolic_orbit.toml |
| test_root_body_transitions.cpp | test_root_body_transitions.toml |
| test_soi_transition.cpp | test_soi_transition.toml |

## Issues Remaining

None.

## Next Steps

None - session tasks completed successfully.