#! /bin/bash
# This script tests: pamhue
# Also requires: pamseq ppmhist pamdepth

echo "Test 1"
# Should print 1213482165 83 twice

pamseq -tupletype=RGB 3 1 | pamdepth 255 | pamhue -huechange=60 | cksum
pamseq -tupletype=RGB 3 1 | pamdepth 255 | pamhue -huechange=-300 | cksum

echo "Test 2"

pamseq -tupletype=RGB 3 1 | pamdepth 255 | ppmhist -sort=rgb
pamseq -tupletype=RGB 3 1 | pamdepth 255 | pamhue -huechange=60 | \
  ppmhist -sort=rgb

echo "Test 3"
# pamhue has no effect on monotone images
# Should print 2425386270 41 twice

pamhue -huechange=45  testgrid.pbm | cmp -s - testgrid.pbm
  echo ${PIPESTATUS[@]} ":" $?
pamhue -huechange=180 testgrid.pbm | cmp -s - testgrid.pbm
  echo ${PIPESTATUS[@]} ":" $?

echo "Test 4"
# spinning the color wheel by multiples of 360 leaves the image unchanged
# Should print 1926073387 101484 twice

pamhue -huechange=0 testimg.ppm   | cmp -s - testimg.ppm
  echo ${PIPESTATUS[@]} ":" $?
pamhue -huechange=360 testimg.ppm | cmp -s - testimg.ppm
  echo ${PIPESTATUS[@]} ":" $?

echo "Test Invalid"

tmpdir=${tmpdir:-/tmp}
test_out=${tmpdir}/test_out

echo 1>&2
echo "Omission of mandatory argument." 1>&2
echo "An error message should appear below the line." 1>&2
echo "-----------------------------------------------------------" 1>&2

pamhue testimg.ppm  > ${test_out} || \
   echo -n "Expected failure 1"; test -s ${test_out}; echo " "$?

rm -f ${test_out}