Add test for metadata

.travis.yml

@@ -10,7 +10,7 @@ before_install:
   - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
   - sudo apt-add-repository --yes ppa:zoogie/sdl2-snapshots
   - sudo apt-get update -qq
-  - sudo apt-get install g++-4.8 libpng12-dev imagemagick libsdl2-dev
+  - sudo apt-get install g++-4.8 libpng12-dev imagemagick libsdl2-dev libimage-exiftool-perl
 
 env:
   matrix:

src/Makefile

@@ -116,6 +116,7 @@ test: flif test-interface
 	../tools/test-lossy.sh ./flif ../tools/kodim01.png ../tmp-test/kodim01-lossy.flif ../tmp-test/decoded_kodim01-lossy.png
 	../tools/test-roundtrip_anim.sh ./flif ../tools/endless_war.gif ../tmp-test/endless_war.flif
 	../tools/test-roundtrip_anim_framedir.sh ./flif ../tools/bouncing_ball_frames ../tmp-test/bouncing_ball.flif
+	../tools/test-metadata.sh ./flif ../testFiles/sig05-014.png ../tmp-test/out-meta.flif ../tmp-test/out-meta.png
 
 
 flif.stats: $(FILES_H) $(FILES_CPP) flif.cpp

tools/test-metadata.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+set -ex
+
+FLIF=$1
+IN=$2
+OUTF=$3
+OUTP=$4
+
+EXIFIN=../tmp-test/in-exif.xmp
+EXIFOUT=../tmp-test/out-exif.xmp
+EXIFTOOL_OPTIONS="-XMP:*"
+
+rm -f ${OUTF} ${OUTP} ${EXIFIN} ${EXIFOUT}
+${FLIF} "${IN}" "${OUTF}"
+${FLIF} -d ${OUTF} ${OUTP}
+exiftool ${EXIFTOOL_OPTIONS} ${IN} -o ${EXIFIN}
+exiftool ${EXIFTOOL_OPTIONS} ${OUTP} -o ${EXIFOUT}
+diff ${EXIFIN} ${EXIFOUT}
+