generator: verified

pkg/generator/plotter/plotter.go

@@ -39,9 +39,6 @@ func NewBitmapPlotter(bm bitmap.Bitmap, factor float32) (Plotter, error) {
 }
 
 func (p Plotter) RandomFreePoint(deadZoneRaduis float32) (float32, float32, error) {
-	if deadZoneRaduis <= 0. {
-		return 0, 0, fmt.Errorf("radius must be positive value: %f", deadZoneRaduis)
-	}
 	fsCount := p.freeCountFn()
 	if fsCount == 0 {
 		return 0, 0, errors.New("RandomFreePoint: no free space left")
@@ -51,7 +48,9 @@ func (p Plotter) RandomFreePoint(deadZoneRaduis float32) (float32, float32, erro
 	if err != nil {
 		return 0, 0, fmt.Errorf("RandomFreePoint: freeNumberToCoordFn: %s", err)
 	}
-	p.plotDeadZone(x, y, deadZoneRaduis)
+	if deadZoneRaduis > 0 {
+		p.plotDeadZone(x, y, deadZoneRaduis)
+	}
 	planetX := float32(x)*p.factor + rand.Float32()*p.factor
 	planetY := float32(y)*p.factor + rand.Float32()*p.factor
 	return planetX, planetY, nil

pkg/generator/plotter/plotter_test.go

@@ -63,8 +63,8 @@ func TestRandomFreePoint(t *testing.T) {
 	}
 
 	_, _, err = p.RandomFreePoint(0)
-	if err == nil {
-		t.Error("expect: error when radius not positive, got: none")
+	if err != nil {
+		t.Errorf("expect: no error when radius is zero, got: %s", err)
 	}
 
 	_, _, err = p.RandomFreePoint(float32(w + h)) // guaranteed to mark whole area dead zone