Function TestPolygon_clip

plotter/polygon_test.go:29–46

This test ensures that the plotter doesn't panic if there are polygons wholly outside of the plotting range.

(t *testing.T)

// This test ensures that the plotter doesn't panic if there are
// polygons wholly outside of the plotting range.
func TestPolygon_clip(t *testing.T) {
	poly, err := plotter.NewPolygon(
		plotter.XYs{{0, 0}, {1, 0}, {1, 1}, {0, 1}, {0, 0}},
	)
	if err != nil {
		t.Fatal(err)
	}
	poly.Color = color.Black // Give the polygon a color to fill.
	p := plot.New()
	// Set the plotting range so that the polygon is outside of it.
	p.X.Min = 2
	p.X.Max = 5

	p.Add(poly)
	c := new(recorder.Canvas)
	dc := draw.NewCanvas(c, vg.Centimeter, vg.Centimeter)
	p.Draw(dc) // If this does not panic, then the test passes.
}