feat(test): better coverage for vips interface

vips_test.go

@@ -18,30 +18,18 @@ func TestVipsRead(t *testing.T) {
 	}
 
 	for _, file := range files {
-		img, _ := os.Open(path.Join("fixtures", file.name))
-		buf, _ := ioutil.ReadAll(img)
-		defer img.Close()
-
-		image, imageType, _ := vipsRead(buf)
+		image, imageType, _ := vipsRead(readImage(file.name))
 		if image == nil {
 			t.Fatal("Empty image")
 		}
 		if imageType != file.expected {
-			t.Fatal("Empty image")
+			t.Fatal("Invalid image type")
 		}
 	}
 }
 
 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")
-	}
-
+	image, _, _ := vipsRead(readImage("test.jpg"))
 	options := vipsSaveOptions{Quality: 95, Type: JPEG}
 
 	buf, err := vipsSave(image, options)
@@ -52,3 +40,80 @@ func TestVipsSave(t *testing.T) {
 		t.Fatal("Empty image")
 	}
 }
+
+func TestVipsRotate(t *testing.T) {
+	image, _, _ := vipsRead(readImage("test.jpg"))
+
+	newImg, err := vipsRotate(image, D90)
+	if err != nil {
+		t.Fatal("Cannot save the image")
+	}
+
+	buf, _ := vipsSave(newImg, vipsSaveOptions{Quality: 95})
+	if len(buf) == 0 {
+		t.Fatal("Empty image")
+	}
+}
+
+func TestVipsZoom(t *testing.T) {
+	image, _, _ := vipsRead(readImage("test.jpg"))
+
+	newImg, err := vipsRotate(image, D90)
+	if err != nil {
+		t.Fatal("Cannot save the image")
+	}
+
+	buf, _ := vipsSave(newImg, vipsSaveOptions{Quality: 95})
+	if len(buf) == 0 {
+		t.Fatal("Empty image")
+	}
+}
+
+func TestVipsWatermark(t *testing.T) {
+	image, _, _ := vipsRead(readImage("test.jpg"))
+
+	watermark := Watermark{
+		Text:       "Copy me if you can",
+		Font:       "sans bold 12",
+		Opacity:    0.5,
+		Width:      200,
+		DPI:        100,
+		Margin:     100,
+		Background: Color{255, 255, 255},
+	}
+
+	newImg, err := vipsWatermark(image, watermark)
+	if err != nil {
+		t.Errorf("Cannot add watermark: %s", err)
+	}
+
+	buf, _ := vipsSave(newImg, vipsSaveOptions{Quality: 95})
+	if len(buf) == 0 {
+		t.Fatal("Empty image")
+	}
+}
+
+func TestVipsImageType(t *testing.T) {
+	imgType := vipsImageType(readImage("test.jpg"))
+	if imgType != JPEG {
+		t.Fatal("Invalid image type")
+	}
+}
+
+func TestVipsMemory(t *testing.T) {
+	mem := VipsMemory()
+
+	if mem.Memory < 1024 {
+		t.Fatal("Invalid memory")
+	}
+	if mem.Allocations == 0 {
+		t.Fatal("Invalid memory allocations")
+	}
+}
+
+func readImage(file string) []byte {
+	img, _ := os.Open(path.Join("fixtures", file))
+	buf, _ := ioutil.ReadAll(img)
+	defer img.Close()
+	return buf
+}