LXR busybox/testsuite/testing.sh

   1# Simple test harness infrastructure for BusyBox
   2#
   3# Copyright 2005 by Rob Landley
   4#
   5# License is GPLv2, see LICENSE in the busybox tarball for full license text.
   6
   7# This file defines two functions, "testing" and "optional"
   8# and a couple more...
   9
  10# The following environment variables may be set to enable optional behavior
  11# in "testing":
  12#    VERBOSE - Print the diff -u of each failed test case.
  13#    DEBUG - Enable command tracing.
  14#    SKIP - do not perform this test (this is set by "optional")
  15#
  16# The "testing" function takes five arguments:
  17#       $1) Test description
  18#       $2) Command(s) to run. May have pipes, redirects, etc
  19#       $3) Expected result on stdout
  20#       $4) Data to be written to file "input"
  21#       $5) Data to be written to stdin
  22#
  23# The exit value of testing is the exit value of $2 it ran.
  24#
  25# The environment variable "FAILCOUNT" contains a cumulative total of the
  26# number of failed tests.
  27
  28# The "optional" function is used to skip certain tests, ala:
  29#   optional FEATURE_THINGY
  30#
  31# The "optional" function checks the environment variable "OPTIONFLAGS",
  32# which is either empty (in which case it always clears SKIP) or
  33# else contains a colon-separated list of features (in which case the function
  34# clears SKIP if the flag was found, or sets it to 1 if the flag was not found).
  35
  36export FAILCOUNT=0
  37export SKIP=
  38
  39# Helper for helpers. Oh my...
  40
  41test x"$ECHO" != x"" || {
  42        ECHO="echo"
  43        test x"`echo -ne`" = x"" || {
  44                # Compile and use a replacement 'echo' which understands -e -n
  45                ECHO="$PWD/echo-ne"
  46                test -x "$ECHO" || {
  47                        gcc -Os -o "$ECHO" ../scripts/echo.c || exit 1
  48                }
  49        }
  50        export ECHO
  51}
  52
  53# Helper functions
  54
  55optional()
  56{
  57        SKIP=
  58        while test "$1"; do
  59                case "${OPTIONFLAGS}" in
  60                        *:$1:*) ;;
  61                        *) SKIP=1; return ;;
  62                esac
  63                shift
  64        done
  65}
  66
  67# The testing function
  68
  69testing()
  70{
  71  NAME="$1"
  72  [ -n "$1" ] || NAME="$2"
  73
  74  if [ $# -ne 5 ]
  75  then
  76    echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
  77    exit 1
  78  fi
  79
  80  [ -z "$DEBUG" ] || set -x
  81
  82  if [ -n "$SKIP" ]
  83  then
  84    echo "SKIPPED: $NAME"
  85    return 0
  86  fi
  87
  88  $ECHO -ne "$3" > expected
  89  $ECHO -ne "$4" > input
  90  [ -z "$VERBOSE" ] || echo ======================
  91  [ -z "$VERBOSE" ] || echo "echo -ne '$4' >input"
  92  [ -z "$VERBOSE" ] || echo "echo -ne '$5' | $2"
  93  $ECHO -ne "$5" | eval "$2" > actual
  94  RETVAL=$?
  95
  96  if cmp expected actual >/dev/null 2>/dev/null
  97  then
  98    echo "PASS: $NAME"
  99  else
 100    FAILCOUNT=$(($FAILCOUNT + 1))
 101    echo "FAIL: $NAME"
 102    [ -z "$VERBOSE" ] || diff -u expected actual
 103  fi
 104  rm -f input expected actual
 105
 106  [ -z "$DEBUG" ] || set +x
 107
 108  return $RETVAL
 109}
 110
 111# Recursively grab an executable and all the libraries needed to run it.
 112# Source paths beginning with / will be copied into destpath, otherwise
 113# the file is assumed to already be there and only its library dependencies
 114# are copied.
 115
 116mkchroot()
 117{
 118  [ $# -lt 2 ] && return
 119
 120  $ECHO -n .
 121
 122  dest=$1
 123  shift
 124  for i in "$@"
 125  do
 126    #bashism: [ "${i:0:1}" == "/" ] || i=$(which $i)
 127    i=$(which $i) # no-op for /bin/prog
 128    [ -f "$dest/$i" ] && continue
 129    if [ -e "$i" ]
 130    then
 131      d=`echo "$i" | grep -o '.*/'` &&
 132      mkdir -p "$dest/$d" &&
 133      cat "$i" > "$dest/$i" &&
 134      chmod +x "$dest/$i"
 135    else
 136      echo "Not found: $i"
 137    fi
 138    mkchroot "$dest" $(ldd "$i" | egrep -o '/.* ')
 139  done
 140}
 141
 142# Set up a chroot environment and run commands within it.
 143# Needed commands listed on command line
 144# Script fed to stdin.
 145
 146dochroot()
 147{
 148  mkdir tmpdir4chroot
 149  mount -t ramfs tmpdir4chroot tmpdir4chroot
 150  mkdir -p tmpdir4chroot/{etc,sys,proc,tmp,dev}
 151  cp -L testing.sh tmpdir4chroot
 152
 153  # Copy utilities from command line arguments
 154
 155  $ECHO -n "Setup chroot"
 156  mkchroot tmpdir4chroot $*
 157  echo
 158
 159  mknod tmpdir4chroot/dev/tty c 5 0
 160  mknod tmpdir4chroot/dev/null c 1 3
 161  mknod tmpdir4chroot/dev/zero c 1 5
 162
 163  # Copy script from stdin
 164
 165  cat > tmpdir4chroot/test.sh
 166  chmod +x tmpdir4chroot/test.sh
 167  chroot tmpdir4chroot /test.sh
 168  umount -l tmpdir4chroot
 169  rmdir tmpdir4chroot
 170}
 171