public void ProjectOntoPlane_ReturnsCorrectly()
{
// arrange
Vector3 sample = Vector3.forward + Vector3.up;
// act
Vector3 resultF = PMath.ProjectOntoPlane(Vector3.up, sample);
Vector3 resultU = PMath.ProjectOntoPlane(Vector3.forward, sample);
Vector3 resultR = PMath.ProjectOntoPlane(Vector3.right, sample);
// assert
Assert.AreEqual(Vector3.forward, resultF, "x projection failed" + TestHelper.ShowVariables(Vector3.forward, resultF));
Assert.AreEqual(Vector3.up, resultU, "y projection failed" + TestHelper.ShowVariables(Vector3.up, resultU));
Assert.AreEqual(sample, resultR, "z projection failed" + TestHelper.ShowVariables(sample, resultR));
}