Testing and Parity

The repository includes a dedicated xUnit project at tests/Spline.Tests/Spline.Tests.csproj.

What is covered

direct ports of the explicit upstream numerical self-checks
parity fixtures for cubic Bezier evaluation and subdivision
parity coverage for MyCurve, TwoParamSpline, TwoCubics, CurveGrid, and Spline
behavior tests for BezierPath and PolylineUtils

Why parity tests matter

The original spline-research repository did not ship as a conventional .NET test project. The current suite captures the translated behavior in a form that can run in CI and protect the package surface against accidental drift.

Run the suite

dotnet test Spline.slnx

When you change solver or rendering behavior, validate both:

the xUnit suite
the interactive result in DemoSpline