concat test

concat_test.go

@@ -0,0 +1,24 @@
+package imageutils
+
+import (
+	"image"
+	"image/png"
+	"io"
+	"testing"
+)
+
+func BenchmarkConcat(b *testing.B) {
+	var instance image.Image
+	pixel := SinglePixel{}
+
+	for i := 0; i < b.N; i++ {
+		instance = Concat(instance, pixel, Right)
+	}
+	err := png.Encode(
+		io.Discard,
+		instance,
+	)
+	if err != nil {
+		panic(err)
+	}
+}

genprof

@@ -1,2 +1,2 @@
-go test -cpuprofile=profile.out -bench=BenchmarkSinglePixel &&
+go test -cpuprofile=profile.out -bench=$1 &&
 go tool pprof -text profile.out

scale_test.go

@@ -18,20 +18,6 @@ func Render(img image.Image, rect image.Rectangle) image.Image {
 	return newimg
 }
 
-type SinglePixel struct{}
-
-func (s SinglePixel) At(x, y int) color.Color {
-	return color.White
-}
-
-func (s SinglePixel) ColorModel() color.Model {
-	return color.RGBAModel
-}
-
-func (s SinglePixel) Bounds() image.Rectangle {
-	return image.Rect(0, 0, 1, 1)
-}
-
 func BenchmarkScale(b *testing.B) {
 	for i := 0; i < b.N; i++ {
 		err := png.Encode(io.Discard,

util.go

@@ -0,0 +1,20 @@
+package imageutils
+
+import (
+	"image"
+	"image/color"
+)
+
+type SinglePixel struct{}
+
+func (s SinglePixel) At(x, y int) color.Color {
+	return color.White
+}
+
+func (s SinglePixel) ColorModel() color.Model {
+	return color.RGBAModel
+}
+
+func (s SinglePixel) Bounds() image.Rectangle {
+	return image.Rect(0, 0, 1, 1)
+}