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- # Simple test harness infrastructure for BusyBox
- #
- # Copyright 2005 by Rob Landley
- #
- # License is GPLv2, see LICENSE in the busybox tarball for full license text.
- # This file defines two functions, "testing" and "optional"
- # and a couple more...
- # The following environment variables may be set to enable optional behavior
- # in "testing":
- # VERBOSE - Print the diff -u of each failed test case.
- # DEBUG - Enable command tracing.
- # SKIP - do not perform this test (this is set by "optional")
- #
- # The "testing" function takes five arguments:
- # $1) Test description
- # $2) Command(s) to run. May have pipes, redirects, etc
- # $3) Expected result on stdout
- # $4) Data to be written to file "input"
- # $5) Data to be written to stdin
- #
- # The exit value of testing is the exit value of $2 it ran.
- #
- # The environment variable "FAILCOUNT" contains a cumulative total of the
- # number of failed tests.
- # The "optional" function is used to skip certain tests, ala:
- # optional FEATURE_THINGY
- #
- # The "optional" function checks the environment variable "OPTIONFLAGS",
- # which is either empty (in which case it always clears SKIP) or
- # else contains a colon-separated list of features (in which case the function
- # clears SKIP if the flag was found, or sets it to 1 if the flag was not found).
- export FAILCOUNT=0
- export SKIP=
- # Helper for helpers. Oh my...
- test x"$ECHO" != x"" || {
- ECHO="echo"
- test x"`echo -ne`" = x"" || {
- # Compile and use a replacement 'echo' which understands -e -n
- ECHO="$PWD/echo-ne"
- test -x "$ECHO" || {
- gcc -Os -o "$ECHO" ../scripts/echo.c || exit 1
- }
- }
- export ECHO
- }
- # Helper functions
- optional()
- {
- SKIP=
- while test "$1"; do
- case $1 in
- "!"*)
- case "${OPTIONFLAGS}" in
- *:${1#!}:*) SKIP=1; return;;
- esac
- shift
- ;;
- *)
- case "${OPTIONFLAGS}" in
- *:$1:*) ;;
- *) SKIP=1; return ;;
- esac
- shift
- ;;
- esac
- done
- }
- # The testing function
- testing()
- {
- NAME="$1"
- [ -n "$1" ] || NAME="$2"
- if [ $# -ne 5 ]
- then
- echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
- exit 1
- fi
- [ -z "$DEBUG" ] || set -x
- if [ -n "$SKIP" ]
- then
- echo "SKIPPED: $NAME"
- return 0
- fi
- $ECHO -ne "$3" > expected
- $ECHO -ne "$4" > input
- [ -z "$VERBOSE" ] || echo ======================
- [ -z "$VERBOSE" ] || echo "echo -ne '$4' >input"
- [ -z "$VERBOSE" ] || echo "echo -ne '$5' | $2"
- $ECHO -ne "$5" | eval "$2" > actual
- RETVAL=$?
- if cmp expected actual >/dev/null 2>/dev/null
- then
- echo "PASS: $NAME"
- else
- FAILCOUNT=$(($FAILCOUNT + 1))
- echo "FAIL: $NAME"
- [ -z "$VERBOSE" ] || diff -u expected actual
- fi
- rm -f input expected actual
- [ -z "$DEBUG" ] || set +x
- return $RETVAL
- }
- # Recursively grab an executable and all the libraries needed to run it.
- # Source paths beginning with / will be copied into destpath, otherwise
- # the file is assumed to already be there and only its library dependencies
- # are copied.
- mkchroot()
- {
- [ $# -lt 2 ] && return
- $ECHO -n .
- dest=$1
- shift
- for i in "$@"
- do
- #bashism: [ "${i:0:1}" == "/" ] || i=$(which $i)
- i=$(which $i) # no-op for /bin/prog
- [ -f "$dest/$i" ] && continue
- if [ -e "$i" ]
- then
- d=`echo "$i" | grep -o '.*/'` &&
- mkdir -p "$dest/$d" &&
- cat "$i" > "$dest/$i" &&
- chmod +x "$dest/$i"
- else
- echo "Not found: $i"
- fi
- mkchroot "$dest" $(ldd "$i" | egrep -o '/.* ')
- done
- }
- # Set up a chroot environment and run commands within it.
- # Needed commands listed on command line
- # Script fed to stdin.
- dochroot()
- {
- mkdir tmpdir4chroot
- mount -t ramfs tmpdir4chroot tmpdir4chroot
- mkdir -p tmpdir4chroot/{etc,sys,proc,tmp,dev}
- cp -L testing.sh tmpdir4chroot
- # Copy utilities from command line arguments
- $ECHO -n "Setup chroot"
- mkchroot tmpdir4chroot $*
- echo
- mknod tmpdir4chroot/dev/tty c 5 0
- mknod tmpdir4chroot/dev/null c 1 3
- mknod tmpdir4chroot/dev/zero c 1 5
- # Copy script from stdin
- cat > tmpdir4chroot/test.sh
- chmod +x tmpdir4chroot/test.sh
- chroot tmpdir4chroot /test.sh
- umount -l tmpdir4chroot
- rmdir tmpdir4chroot
- }
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