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#! /bin/bash

# See if PBM_TEST_PATH is set.
# PBM_TEST_PATH is the list of directories with the Netpbm programs
# you want to test.
#
# (1) check-tree: set to a long list of directories which contain
# the relevant executables.
#
# (2) check-package: set to the [package]/bin directory.
# 
# (3) check-install: empty string.  Executables will be sought from
# the default execution path ($PATH).
#
# You can set it here by de-commenting and modifying the next line:
#export PBM_TEST_PATH="/usr/local/bin/"

case ${CHECK_TYPE} in
tree)
    echo
    echo "Checking programs in source tree" ;;
package)  if [ -z $PBM_TEST_PATH ]
  then
    echo "Error: PBM_TEST_PATH is not set."
    exit 1
  elif [ ! -d $PBM_TEST_PATH ]
    then
    echo
    echo "Error: No directory named $PBM_TEST_PATH."
    echo
    echo "You must run \"make package\" before this test."
    echo
    echo "If you specified the package directory for \"make package\""
    echo "you must do the same for \"make check\"."
    echo
  exit 1
  fi ;;
install)
  echo
  echo "Programs in the default execution path:"
  echo $PATH
  echo "will be tested." ;;
*)
  echo "Invalid test type: ${CHECK_TYPE}"
  exit 1 ;;
esac

# Set srcdir, which is the directory which contains Execute-Tests (this
# script), programs that run the test, including *.test and helpers that they
# invoke, the list of tests to run ('Test-Order'), and *.ok files that
# indicate the expected results of tests.

srcdir=$(dirname $0)

# Set tmpdir, which is used in some of the test scripts.  By default
# this is created by mktemp.  The user can override and specify tmpdir,
# but in this case it must be an existing directory and must not be
# either $srcdir or current work.

if [ -z $tmpdir ]
  then
    tmpdir_created=$(mktemp -d "${TMPDIR:-/tmp}/netpbm.XXXXXXXX") || exit 1;
  export tmpdir=${tmpdir_created}
  else
  tmpdir_created="";
  if [ ! -d ${tmpdir} ]
     then echo "Specified temporary directory $tmpdir does not exist."
     exit 1;
  elif [ ${tmpdir} -ef ${srcdir} ]
     then echo "Temporary directory must not be $srcdir."
     exit 1;
  elif [ ${tmpdir} -ef $PWD ]
     then echo "Temporary directory must not be current directory."
     exit 1;
  fi
fi

# If necessary set the RGBDEF environment variable.
#export RGBDEF=/etc/rgb.txt
#export RGBDEF=/usr/local/netpbm/lib/rgb.txt
#export RGBDEF=/usr/share/emacs/*/etc/rgb.txt


# Declare arrays used to count and report test results.
# "UNEXPECTED SUCCESS" and "EXPECTED FAILURE" are not used now;
# they are reserved for future expansion.
declare -a array=(0 0 0 0 0)

# Older versions of bash get confused when array elements contain
# spaces.

status[0]="SUCCESS"
status[1]="FAILURE"
status[2]="UNEXPECTED SUCCESS"
status[3]="EXPECTED FAILURE"
status[4]="NOT TESTABLE"



# Copy test image files to the current work directory

if [ ! -f ./testgrid.pbm ]
  then cp -v ${srcdir}/testgrid.pbm ./testgrid.pbm
fi

if [ ! -f ./testimg.ppm ]
  then cp -v ${srcdir}/testimg.ppm  ./testimg.ppm 
fi

# The block-bin directory
#
# This directory contains dummy executables with the names of the
# Netpbm programs that are to be tested.  These dummy executables
# exist to prevent execution of programs (typically from a previous
# installation of Netpbm) in the default path during the tests.
# They report error when accessed and nothing else.
# The directory is placed in PATH between PBM_TEST_PATH and
# default PATH.

# Create block-bin.  If it already exists, erase and create anew.

if [ ! -z $PBM_TEST_PATH ]
  then
  blockbin=$PWD/block-bin
  if [ -d  $blockbin ]
    then rm -rf $blockbin
  fi
  mkdir $blockbin
  cp ${srcdir}/BLOCK $blockbin/BLOCK
  chmod +x $blockbin/BLOCK

# Populate the block-bin directory using all-in-place.ok and
# legacy-names.ok which together make a complete list of programs.

  sed 's/: ok$//' \
       ${srcdir}/all-in-place.ok ${srcdir}/legacy-names.ok | \
     tr ' ' '\n' | while read prog
    do
    ln -s $blockbin/BLOCK $blockbin/$prog
    done

  testpath=$PBM_TEST_PATH:$blockbin:$PATH:$BUILDDIR/test
else
# We don't need block-bin when testing after installation.
  testpath=$PATH:$BUILDDIR/test
fi



# Execute the tests, as described in the "Test-Order" file.
#
# Each test outputs a ".out" file, which is compared against a
# corresponding ".ok" file.  For example the output from "pbmmake.test"
# is "pbmmake.out" and when this matches "pbmmake.ok" we declare the
# test a success.
# In the error case the ".out" file is retained in the current work
# directory.
#
# All tests are self-contained.
#
# By default the tests are executed in the order described in the
# file Test-Order.  Copy this file from the source directory
# to the work directory.


# Provision for running programs under valgrind.
# Note that valgrind tests consume time.
#
# Output from valgrind must be redirected in some manner because some
# tests examine standard error (fd2) output.  Here we use --log-file.
# (See below)

if [ -z $VALGRIND_TESTS ]
  then VALGRIND_TESTS="off";
elif [ $VALGRIND_TESTS = "on" ]
  then
  valdir=$PWD/valgrind;
  mkdir $valdir
 
  vg_command_base="valgrind --trace-children=yes";

  for i in awk cat cksum cmp cp cut date dirname egrep fgrep file grep gs \
    head mkdir mktemp perl rm sed seq sh tee testrandom tr uniq

    # Tell valgrind not to probe execution of the above programs.

    do vg_skip=$vg_skip"/*/"$i","; done;

  vg_command_base=$vg_command_base" --trace-children-skip="$vg_skip;
  #
  # If using an older version of valgrind (< v.3.6) that does not
  # support --trace-children-skip=... , comment out the above line
  # and let valgrind probe execution of all programs listed above.
  # This greatly increases execution time.

fi


# Provision for running only chosen tests.
# The string "target" is a comma-separated list of target programs.
# When set only tests for programs in the list will be run.
# 
# The --no-clobber version comes useful when the user wants a modified
# (pared-down) version of Test-Order.

if [ ! -z $target ]
  then
  echo $target | sed 's/,/\n/g' | \
                 sed -e 's/^/# This script tests: .*\\</' -e 's/$/\\>/' \
                     -e '/^$/q' | \
                 grep -f - ${srcdir}/*.test -l | \
                   while read i ; do echo ${i##*/} ; done | \
                 grep -f - ${srcdir}/Test-Order > ./Test-Order ;
  if [ ! -s ./Test-Order ]
    then echo;
         echo "Error: No testable program names in target: "$target;
         echo; exit 1
  fi
else 
       cp ${srcdir}/Test-Order ./Test-Order ;
       #cp --no-clobber ${srcdir}/Test-Order ./Test-Order ;
fi

echo

for tname in `grep -v "^#" ./Test-Order | fgrep ".test"`
do
echo == $tname ==

# If running tests under valgrind, complete vg_command by prepending
# the valgrind output file, which is test-specific.
  
if [ $VALGRIND_TESTS = "on" ]
  then
  vg_command="$vg_command_base --log-file=${valdir}/${tname%.test}.%p.vout"
fi

# Execute a single test and test its result.

PATH=${testpath} $vg_command ${srcdir}/$tname > ${tname%.test}.out;
let result=$?
case $result in
0)   cmp -s ${tname%.test}.out ${srcdir}/${tname%.test}.ok ;
     if [ $? -eq 0 ]
        then let result=0;  rm  ${tname%.test}.out ;
        else let result=1;
             grep "^##" ${srcdir}/$tname  # Print failure message.
     fi ;;
80) let result=4 ;;
*)  let result=1 ;;
esac

# Report whether a single test succeeded or failed.
# Increment counters.

echo $tname: ${status[${result}]}; echo
let array[${result}]=${array[${result}]}+1
let total_scripts=${total_scripts}+1

done

# Erase temporary bin directory and its contents.

rm -rf ${srcdir}/bin


# Erase temporary directory and its contents, if it was created.

if [ -n $tmpdir_created ]
    then rm -rf $tmpdir_created
fi


# Erase test image files in the current (work) directory.
# (Do not erase them if we are working from the source directory.)

if [ ! $PWD -ef ${srcdir} ]
    then rm ./testimg.ppm ./testgrid.pbm
fi


# Calculate success / failure totals and print a summary report.
# Report date and time of completion.

echo "Test summary:"
echo ==================

for s in 0 1 2 3 4
  do
    if [[ ${array[${s}]} -gt 0 || s -eq 1 ]]
    then echo ${status[${s}]} ${array[${s}]}
    fi
  done

let total_testable=${total_scripts}-${array[4]}
echo "TOTAL TESTABLE" $total_testable

echo ==================
echo "All tests done."
date -u +"%a, %d %b %Y %H:%M:%S %z"


# Exit with status 0 if all possible tests succeeded, 1 otherwise.

if [[ ${array[0]} -eq ${total_testable} ]]
then exit 0
else exit 1
fi