add circle test

draw2dkit/draw2dkit_test.go

@@ -0,0 +1,30 @@
+package draw2dkit
+
+import (
+	"image"
+	"image/color"
+	"testing"
+
+	"github.com/llgcode/draw2d/draw2dimg"
+	"github.com/stanim/draw2d"
+)
+
+func TestCircle(t *testing.T) {
+	width := 200
+	height := 200
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+	gc := draw2dimg.NewGraphicContext(img)
+
+	gc.SetStrokeColor(color.NRGBA{255, 255, 255, 255})
+	gc.SetFillColor(color.NRGBA{255, 255, 255, 255})
+	gc.Clear()
+
+	gc.SetStrokeColor(color.NRGBA{255, 0, 0, 255})
+	gc.SetLineWidth(1)
+
+	// Draw a circle
+	Circle(gc, 100, 100, 50)
+	gc.Stroke()
+
+	draw2d.SaveToPngFile("../resource/result/TestCircle.png", img)
+}