runtest

#!/bin/sh

# Return errors:
#
# 0   - The test passed
# 1   - Cannot find Dillo binary
# 2   - Cannot find test or reference test
# 3   - Dillo crashed or cannot find window
# 100 - The test doesn't match the reference

set -e
#set -x

if [ ! -e "$DILLOBIN" ]; then
  echo missing dillo binary, set DILLOBIN with the path to dillo
  exit 1
fi

test_fpath="$1"

# Set the testfile to absolute path
testfile="$PWD/$test_fpath"

if [ ! -e "$testfile" ]; then
  echo "cannot find test file: $testfile" >&2
  exit 2
fi

testdir=$(dirname "$testfile")

# Get the match file
match=$(xmllint --html --xpath "string(//head/link[@rel='match']/@href)" "$testfile")

if [ -z "$match" ]; then
  echo "cannot find link rel=match file" >&2
  exit 2
fi

reffile="$testdir/$match"

if [ ! -e "$reffile" ]; then
  echo "reference file $reffile not found" >&2
  exit 2
fi

magick_bin="convert"
if command -v magick 2>&1 >/dev/null; then
  magick_bin="magick"
fi

function render_page() {
  htmlfile="$1"
  outpic="$2"

  "$DILLOBIN" -f "$htmlfile" &
  dillopid=$!

  # TODO: We need a better system to determine when the page loaded
  sleep 0.5

  # Capture only Dillo window
  winid=$(xwininfo -all -root | awk '/Dillo:/ {print $1}')
  if [ -z "$winid" ]; then
    echo "cannot find Dillo window" >&2
    exit 3
  fi
  xwd -id "$winid" -silent | ${magick_bin} xwd:- png:${outpic}

  kill "$dillopid"
}

mkdir -p out

render_page "$testfile" "out/test.png"
render_page "$reffile" "out/ref.png"

# AE = Absolute Error count of the number of different pixels
diffcount=$(compare -metric AE "out/test.png" "out/ref.png" "out/diff.png" 2>&1 || true)

# The test passes only if both images are identical
if [ "$diffcount" = "0" ]; then
  #echo "OK   $testfile"
  ret=0
else
  #echo "FAIL $testfile"
  ret=100
fi

exit $ret