test/test_compression.sh : Use wc instead of stat to get file size.

The stat program has different command line parameters depend on
whether its the GNU or BSD version. Sitch to 'wc -c' instead which
seems more portable.
Plus other minor improvements.

diff --git a/test/test_compression.sh b/test/test_compression.sh
index ed2302b..2fc9ebc 100755 (executable)
--- a/test/test_compression.sh
+++ b/test/test_compression.sh
@@ -27,24 +27,25 @@ LD_LIBRARY_PATH=`pwd`/../objs/$BUILD/lib:$LD_LIBRARY_PATH
 export LD_LIBRARY_PATH
 PATH=`pwd`/../src/flac:$PATH
 
-echo "Using FLAC binary :" `which flac`
+echo "Using FLAC binary :" $(which flac)
 
 date=`date "+%Y%m%dT%H%M%S"`
 fname="comp${date}.flac"
 
-last_size=0
 last_k=0
-for k in `seq 1 8` ; do
+last_size=$(wc -c < noisy-sine.wav)
+
+echo "Original file size ${last_size} bytes."
+
+for k in $(seq 1 8) ; do
        flac -${k} --silent noisy-sine.wav -o ${fname}
-       size=`stat --format="%s" ${fname}`
+       size=$(wc -c < ${fname})
        echo "Compression level ${k}, file size ${size} bytes."
-       if test $k -gt 1 ; then
-               if test $last_size -lt $size ; then
-                       echo "Error : Compression $last_k size $last_size >= compression $k size $size."
-                       exit 1
-                       fi
+       if test ${last_size} -lt ${size} ; then
+               echo "Error : Compression ${last_k} size $last_size >= compression $k size $size."
+               exit 1
                fi
-       last_size=$size
-       last_k=$k
-       rm -f $fname
+       last_size=${size}
+       last_k=${k}
+       rm -f ${fname}
        done