Function TestLoopBasic

s2/loop_test.go:219–254

(t *testing.T)

}

func TestLoopBasic(t *testing.T) {
	shape := Shape(makeLoop("0:0, 0:1, 1:0"))

	if got, want := shape.NumEdges(), 3; got != want {
		t.Errorf("shape.NumEdges() = %d, want %d", got, want)
	}
	if got, want := shape.NumChains(), 1; got != 1 {
		t.Errorf("shape.NumChains() = %d, want %d", got, want)
	}
	if got, want := shape.Chain(0).Start, 0; got != 0 {
		t.Errorf("shape.Chain(0).Start = %d, want %d", got, want)
	}
	if got, want := shape.Chain(0).Length, 3; got != want {
		t.Errorf("shape.Chain(0).Length = %d, want %d", got, want)
	}

	e := shape.Edge(2)
	if want := PointFromLatLng(LatLngFromDegrees(1, 0)); !e.V0.ApproxEqual(want) {
		t.Errorf("shape.Edge(2) end A = %v, want %v", e.V0, want)
	}
	if want := PointFromLatLng(LatLngFromDegrees(0, 0)); !e.V1.ApproxEqual(want) {
		t.Errorf("shape.Edge(2) end B = %v, want %v", e.V1, want)
	}
	if got, want := shape.Dimension(), 2; got != want {
		t.Errorf("shape.Dimension() = %v, want %v", got, want)
	}
	if shape.IsEmpty() {
		t.Errorf("shape.IsEmpty() = true, want false")
	}
	if shape.IsFull() {
		t.Errorf("shape.IsFull() = true, want false")
	}
	if shape.ReferencePoint().Contained {
		t.Errorf("shape.ReferencePoint().Contained = true, want false")
	}
}

func TestLoopHoleAndSign(t *testing.T) {
	l := LoopFromPoints(parsePoints("0:-180, 0:-90, 0:0, 0:90"))