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test: add degenerate-triangle limiting-angle and edge-DOF guard tests

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Finding-F and Finding-G from doc/reviewer/external-audit-2026-05-30.md
(java-port-audit missing-test items 1 and 2).

Finding-F — Degenerate triangle: limiting angles (item 1)
  test_euclidean_functional.cpp:
    DegenerateTriangle_LimitingAngles_L{12,23,31}TooLong
      — verifies α_opposite = π, other two = 0, valid = false
      for all three edge-over-long cases
    DegenerateTriangle_GradientPicksUpPiCorner
      — end-to-end mesh test: forces effective l12 >> l23+l31 via
        lambda0, evaluates gradient, asserts G_v3 = π (not 2π from
        a skipped degenerate face) and G_v1=G_v2 = 2π

  test_spherical_functional.cpp:
    DegenerateTriangle_LimitingAngles_S{12,23,31}TooLong
      — same coverage for spherical_angles()

Finding-G — euclidean_hessian edge-DOF guard (item 2)
  test_euclidean_hessian.cpp:
    EdgeDOFGuard_Throws
      — assign_euclidean_all_dof_indices + euclidean_hessian → throw
    EdgeDOFGuard_VertexOnlyDoesNotThrow
      — vertex-only layout → no throw (regression guard)

275/275 CGAL tests pass, 0 failed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Tarik Moussa
2026-05-31 00:31:07 +02:00
parent 7534c62c3d
commit adbf682f0f
4 changed files with 182 additions and 3 deletions
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doc/reviewer/external-audit-2026-05-30.md
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@@ -704,8 +704,8 @@ index. Add a comment:
| C | `euclidean_hessian.hpp` | 26–27, 57–58 | Doc error | Medium | ✅ Fixed 2026-05-31 |
| D | `euclidean_functional.hpp` + 2 others | 97–107 | Doc error | Medium | ✅ Fixed 2026-05-31 |
| E | `cp_euclidean_functional.hpp` | 338–349, 373–387 | Inconsistency | Medium | ✅ Fixed 2026-05-31 |
| F | test files | — | Test gap | Medium | 🟠 Open |
| G | test files | — | Test gap | Medium | 🟠 Open |
| F | test files | — | Test gap | Medium | ✅ Fixed 2026-05-31 |
| G | test files | — | Test gap | Medium | ✅ Fixed 2026-05-31 |
| H | test files | — | Test gap | Medium | 🟠 Open |
| I | CI workflow | — | Arch risk | High | 🔵 Open |
| MINOR-1 | `spherical_functional.hpp` | 404 | Doc error | Minor | 🟡 Open |