fix(image): tests

image.go

@@ -9,6 +9,7 @@ func (i *Image) Resize(width, height int) ([]byte, error) {
 	options := Options{
 		Width:  width,
 		Height: height,
+		Embed:  true,
 	}
 	return i.Process(options)
 }

image_test.go

@@ -1,6 +1,7 @@
 package bimg
 
 import (
+	"fmt"
 	"path"
 	"testing"
 )
@@ -11,8 +12,9 @@ func TestImageResize(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 300, 240) {
+	err = assertSize(buf, 300, 240)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_resize_out.jpg", buf)
@@ -24,21 +26,23 @@ func TestImageExtract(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 300, 300) {
+	err = assertSize(buf, 300, 300)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_extract_out.jpg", buf)
 }
 
 func TestImageEnlarge(t *testing.T) {
-	buf, err := initImage("test.png").Enlarge(500, 380)
+	buf, err := initImage("test.png").Enlarge(500, 375)
 	if err != nil {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 500, 380) {
+	err = assertSize(buf, 500, 375)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_enlarge_out.jpg", buf)
@@ -50,8 +54,9 @@ func TestImageCrop(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 800, 600) {
+	err = assertSize(buf, 800, 600)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_crop_out.jpg", buf)
@@ -63,8 +68,9 @@ func TestImageCropByWidth(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 600, 375) {
+	err = assertSize(buf, 600, 375)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_crop_width_out.jpg", buf)
@@ -76,8 +82,9 @@ func TestImageCropByHeight(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 800, 480) {
+	err = assertSize(buf, 480, 300)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_crop_height_out.jpg", buf)
@@ -89,8 +96,9 @@ func TestImageThumbnail(t *testing.T) {
 		t.Errorf("Cannot process the image: %#v", err)
 	}
 
-	if assertSize(buf, 100, 100) {
+	err = assertSize(buf, 100, 100)
-		t.Error("Invalid image size")
+	if err != nil {
+		t.Error(err)
 	}
 
 	Write("fixtures/test_thumbnail_out.jpg", buf)
@@ -141,13 +149,13 @@ func initImage(file string) *Image {
 	return NewImage(buf)
 }
 
-func assertSize(buf []byte, width, height int) bool {
+func assertSize(buf []byte, width, height int) error {
 	size, err := NewImage(buf).Size()
 	if err != nil {
-		return false
+		return err
 	}
-	if size.Width != 220 || size.Height != 300 {
+	if size.Width != width || size.Height != height {
-		return false
+		return fmt.Errorf("Invalid image size: %dx%d", size.Width, size.Height)
 	}
-	return true
+	return nil
 }

options.go

@@ -62,12 +62,12 @@ type Options struct {
 	AreaWidth    int
 	Top          int
 	Left         int
-	Crop         bool
-	Enlarge      bool
 	Extend       int
-	Embed        bool
 	Quality      int
 	Compression  int
+	Crop         bool
+	Enlarge      bool
+	Embed        bool
 	Type         ImageType
 	Rotate       Angle
 	Flip         Direction

resize.go

@@ -82,7 +82,10 @@ func Resize(buf []byte, o Options) ([]byte, error) {
 	}
 
 	// Transform image if necessary
-	if o.Width != inWidth || o.Height != inHeight {
+	debug(">>>>> Resolution %dx%d -> %dx%d", o.Width, o.Height, inWidth, inHeight)
+
+	shouldExtract := o.Width != inWidth || o.Height != inHeight || o.AreaWidth > 0 || o.AreaHeight > 0
+	if shouldExtract {
 		// Use vips_shrink with the integral reduction
 		if shrink > 1 {
 			image, residual, err = shrinkImage(image, o, residual, shrink)