public void Test_S2VertexIdLaxLoopShape_EmptyLoop()
{
var shape = new S2VertexIdLaxLoopShape(Array.Empty <int>(), null);
Assert.Equal(0, shape.NumEdges());
Assert.Equal(0, shape.NumVertices);
Assert.Equal(0, shape.NumChains());
Assert.Equal(2, shape.Dimension());
Assert.True(shape.IsEmpty());
Assert.False(shape.IsFull());
Assert.False(shape.GetReferencePoint().Contained);
}
public void Test_S2VertexIdLaxLoopShape_InvertedLoop()
{
var vertex_array = ParsePointsOrDie("0:0, 0:1, 1:1, 1:0");
var vertex_ids = new[] { 0, 3, 2, 1 }; // Inverted.
var shape = new S2VertexIdLaxLoopShape(vertex_ids, vertex_array.ToArray());
Assert.Equal(4, shape.NumEdges());
Assert.Equal(4, shape.NumVertices);
Assert.Equal(1, shape.NumChains());
Assert.Equal(0, shape.GetChain(0).Start);
Assert.Equal(4, shape.GetChain(0).Length);
Assert.Equal(vertex_array[0], shape.Vertex(0));
Assert.Equal(vertex_array[3], shape.Vertex(1));
Assert.Equal(vertex_array[2], shape.Vertex(2));
Assert.Equal(vertex_array[1], shape.Vertex(3));
Assert.Equal(2, shape.Dimension());
Assert.False(shape.IsEmpty());
Assert.False(shape.IsFull());
Assert.True(shape.ContainsBruteForce(S2.Origin));
}