feat(test): vips

vips.go

@@ -19,6 +19,12 @@ var (
 	initialized bool = false
 )
 
+type vipsSaveOptions struct {
+	Quality     int
+	Compression int
+	Type        ImageType
+}
+
 func init() {
 	if C.VIPS_MAJOR_VERSION <= 7 && C.VIPS_MINOR_VERSION < 40 {
 		panic("unsupported old vips version!")
@@ -109,6 +115,38 @@ func vipsRead(buf []byte) (*C.struct__VipsImage, ImageType, error) {
 	return image, imageType, nil
 }
 
+func vipsSave(image *C.struct__VipsImage, o vipsSaveOptions) ([]byte, error) {
+	var ptr unsafe.Pointer
+	length := C.size_t(0)
+	err := C.int(0)
+
+	defer C.g_object_unref(C.gpointer(image))
+
+	switch {
+	case o.Type == PNG:
+		err = C.vips_pngsave_bridge(image, &ptr, &length, 1, C.int(o.Compression), C.int(o.Quality), 0)
+		break
+	case o.Type == WEBP:
+		err = C.vips_webpsave_bridge(image, &ptr, &length, 1, C.int(o.Quality), 0)
+		break
+	default:
+		err = C.vips_jpegsave_bridge(image, &ptr, &length, 1, C.int(o.Quality), 0)
+		break
+	}
+
+	if int(err) != 0 {
+		return nil, catchVipsError()
+	}
+
+	buf := C.GoBytes(ptr, C.int(length))
+
+	// Cleanup
+	C.g_free(C.gpointer(ptr))
+	C.vips_error_clear()
+
+	return buf, nil
+}
+
 func vipsExtract(image *C.struct__VipsImage, left, top, width, height int) (*C.struct__VipsImage, error) {
 	var buf *C.struct__VipsImage
 	defer C.g_object_unref(C.gpointer(image))
@@ -207,44 +245,6 @@ func vipsImageType(buf []byte) ImageType {
 	return imageType
 }
 
-type vipsSaveOptions struct {
-	Quality     int
-	Compression int
-	Type        ImageType
-}
-
-func vipsSave(image *C.struct__VipsImage, o vipsSaveOptions) ([]byte, error) {
-	var ptr unsafe.Pointer
-	length := C.size_t(0)
-	err := C.int(0)
-
-	defer C.g_object_unref(C.gpointer(image))
-
-	switch {
-	case o.Type == PNG:
-		err = C.vips_pngsave_bridge(image, &ptr, &length, 1, C.int(o.Compression), C.int(o.Quality), 0)
-		break
-	case o.Type == WEBP:
-		err = C.vips_webpsave_bridge(image, &ptr, &length, 1, C.int(o.Quality), 0)
-		break
-	default:
-		err = C.vips_jpegsave_bridge(image, &ptr, &length, 1, C.int(o.Quality), 0)
-		break
-	}
-
-	if int(err) != 0 {
-		return nil, catchVipsError()
-	}
-
-	buf := C.GoBytes(ptr, C.int(length))
-
-	// Cleanup
-	C.g_free(C.gpointer(ptr))
-	C.vips_error_clear()
-
-	return buf, nil
-}
-
 func vipsExifOrientation(image *C.struct__VipsImage) int {
 	return int(C.vips_exif_orientation(image))
 }

vips_test.go

@@ -0,0 +1,54 @@
+package bimg
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"testing"
+)
+
+func TestVipsRead(t *testing.T) {
+	files := []struct {
+		name     string
+		expected ImageType
+	}{
+		{"test.jpg", JPEG},
+		{"test.png", PNG},
+		{"test.webp", WEBP},
+	}
+
+	for _, file := range files {
+		img, _ := os.Open(path.Join("fixtures", file.name))
+		buf, _ := ioutil.ReadAll(img)
+		defer img.Close()
+
+		image, imageType, _ := vipsRead(buf)
+		if image == nil {
+			t.Fatal("Empty image")
+		}
+		if imageType != file.expected {
+			t.Fatal("Empty image")
+		}
+	}
+}
+
+func TestVipsSave(t *testing.T) {
+	img, _ := os.Open(path.Join("fixtures", "test.jpg"))
+	buf, _ := ioutil.ReadAll(img)
+	defer img.Close()
+
+	image, _, _ := vipsRead(buf)
+	if image == nil {
+		t.Fatal("Empty image")
+	}
+
+	options := vipsSaveOptions{Quality: 95, Type: JPEG}
+
+	buf, err := vipsSave(image, options)
+	if err != nil {
+		t.Fatal("Cannot save the image")
+	}
+	if len(buf) == 0 {
+		t.Fatal("Empty image")
+	}
+}