public void TestFixMiddlePoint(float expectedX, int expectedY,
float x1, float y1, float x2, float y2, float x3, float y3)
{
var expected = new PointF(expectedX, expectedY);
var p1 = new PointF(x1, y1);
var p2 = new PointF(x2, y2);
var p3 = new PointF(x3, y3);
ccl.FixMiddlePoint(p1, p2, p3).Should().Be(expected);
}