hmmm

resize/resize.go

@@ -2,6 +2,7 @@ package resize
 
 import (
 	"bytes"
+	"fmt"
 	"github.com/nfnt/resize"
 	i "image"
 	"image/jpeg"
@@ -9,6 +10,10 @@ import (
 )
 
 func Shrink(image string, maxSize uint, quality int) (string, error) {
+	if quality < 1 || quality > 100 {
+		return "", fmt.Errorf("quality must be between 1 and 100, got %d", quality)
+	}
+
 	img, _, err := i.Decode(bytes.NewReader([]byte(image)))
 	if err != nil {
 		return "", err

resize/resize_test.go

@@ -0,0 +1,48 @@
+package resize
+
+import (
+	"bytes"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"testing"
+)
+
+func createTestImage() []byte {
+	img := image.NewRGBA(image.Rect(0, 0, 100, 100))
+	for x := 0; x < 100; x++ {
+		for y := 0; y < 100; y++ {
+			img.Set(x, y, color.RGBA{uint8(x), uint8(y), 255, 255})
+		}
+	}
+	var buf bytes.Buffer
+	_ = jpeg.Encode(&buf, img, nil)
+	return buf.Bytes()
+}
+
+func TestShrink_Success(t *testing.T) {
+	testImage := createTestImage()
+	result, err := Shrink(string(testImage), 50, 80)
+	if err != nil {
+		t.Fatalf("expected no error, got %v", err)
+	}
+	if len(result) == 0 {
+		t.Fatalf("expected non-empty result, got empty string")
+	}
+}
+
+func TestShrink_InvalidImage(t *testing.T) {
+	invalidImage := "not-an-image"
+	_, err := Shrink(invalidImage, 50, 80)
+	if err == nil {
+		t.Fatalf("expected an error for invalid image input, got nil")
+	}
+}
+
+func TestShrink_InvalidQuality(t *testing.T) {
+	testImage := createTestImage()
+	_, err := Shrink(string(testImage), 50, -10)
+	if err == nil {
+		t.Fatalf("expected an error for invalid quality, got nil")
+	}
+}