added tests

main.go

@@ -8,7 +8,7 @@ import (
 )
 
 func main() {
-	img := noise.PerlinGenerate(200, 200, 0.2)
-	f, _ := os.Create("file.png")
+	img := noise.PerlinGenerate(200, 200, 1)
+	f, _ := os.Create("output/perlin_freq_1_parrallel.png")
 	png.Encode(f, img)
 }

noise/noise.go

@@ -50,10 +50,11 @@ func PerlinGenerate(height, width int, freq float64) *image.RGBA {
 	//keep these values as such
 	alpha, beta, n := 2., 2., 3
 
-	// serial implimentation
-	// works well
 	img := image.NewRGBA(image.Rect(0, 0, width, height))
 	p := perlin.NewPerlin(alpha, beta, n, rand.Int63())
+
+	// serial implimentation
+	// works well
 	for x := 0.; x < float64(height); x++ {
 		for y := 0.; y < float64(width); y++ {
 			t := p.Noise2D((x/10)*freq, (y/10)*freq)