[GitHub] [commons-imaging] christoffer-rydberg commented on a change in pull request #55: [IMAGING-236] Add support to read multiple images from GIF

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christoffer-rydberg commented on a change in pull request #55: [IMAGING-236] Add support to read multiple images from GIF
URL: https://github.com/apache/commons-imaging/pull/55#discussion_r341810493
 
 

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 File path: src/test/java/org/apache/commons/imaging/formats/gif/GifReadTest.java
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 @@ -57,10 +58,40 @@ public void testImageInfo() throws Exception {
         // TODO assert more
     }
 
+    @Test
+    public void testImageDimensions() throws Exception {
+        final ImageInfo imageInfo = Imaging.getImageInfo(imageFile);
+        final GifImageMetadata metadata = (GifImageMetadata) Imaging.getMetadata(imageFile);
+        final List<BufferedImage> images = Imaging.getAllBufferedImages(imageFile);
+
+        int width = 0;
+        int height = 0;
+        for(int i = 0; i < images.size(); i++) {
+            final BufferedImage image = images.get(i);
+            final GifImageMetadataItem metadataItem = metadata.getItems().get(i);
+            final int xOffset = metadataItem.getLeftPosition();
+            final int yOffset = metadataItem.getTopPosition();
+            width = Math.max(width, image.getWidth() + xOffset);
+            height = Math.max(height, image.getHeight() + yOffset);
+        }
+
+        assertEquals(width, metadata.getWidth());
+        assertEquals(height, metadata.getHeight());
+        assertEquals(width, imageInfo.getWidth());
+        assertEquals(height, imageInfo.getHeight());
 
 Review comment:
   The first two asserts are for the metadata and the second two are for the image info. It's just to ensure the width/height is correctly set in both.

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