tests/test-lib.sh

   1 # source this file; set up for tests
   2
   3 # Skip this test if the shell lacks support for functions.
   4 unset function_test
   5 eval 'function_test() { return 11; }; function_test'
   6 if test $? != 11; then
   7   echo "$0: /bin/sh lacks support for functions; skipping this test." 1>&2
   8   (exit 77); exit 77
   9 fi
  10
  11 skip_test_()
  12 {
  13   echo "$0: skipping test: $@" 1>&2
  14   (exit 77); exit 77
  15 }
  16
  17 require_ulimit_()
  18 {
  19   ulimit_works=yes
  20   # Expect to be able to exec a program in 10MB of virtual memory,
  21   # but not in 20KB.  I chose "date".  It must not be a shell built-in
  22   # function, so you can't use echo, printf, true, etc.
  23   # Of course, in coreutils, I could use $top_builddir/src/true,
  24   # but this should be able to work for other projects, too.
  25   ( ulimit -v 10000; date ) > /dev/null 2>&1 || ulimit_works=no
  26   ( ulimit -v 20;    date ) > /dev/null 2>&1 && ulimit_works=no
  27
  28   test $ulimit_works = no \
  29     && skip_test_ "this shell lacks ulimit support"
  30 }
  31
  32 uid_is_privileged_()
  33 {
  34   # Make sure id -u succeeds.
  35   my_uid=$(id -u) \
  36     || { echo "$0: cannot run \`id -u'" 1>&2; return 1; }
  37
  38   # Make sure it gives valid output.
  39   case $my_uid in
  40     0) ;;
  41     *[!0-9]*)
  42       echo "$0: invalid output (\`$my_uid') from \`id -u'" 1>&2
  43       return 1 ;;
  44     *) return 1 ;;
  45   esac
  46 }
  47
  48 skip_if_()
  49 {
  50   case $1 in
  51     root) skip_test_ must be run as root ;;
  52     non-root) skip_test_ must be run as non-root ;;
  53     *) ;;  # FIXME?
  54   esac
  55 }
  56
  57 require_selinux_()
  58 {
  59   case `ls -Zd .` in
  60     '? .'|'unlabeled .')
  61       skip_test_ "this system (or maybe just" \
  62         "the current file system) lacks SELinux support"
  63     ;;
  64   esac
  65 }
  66
  67 skip_if_root_() { uid_is_privileged_ && skip_test_ "must be run as non-root"; }
  68 error_() { echo "$0: $@" 1>&2; (exit 1); exit 1; }
  69 framework_failure() { error_ 'failure in testing framework'; }
  70
  71 test_dir_=$(pwd)
  72
  73 this_test_() { echo "./$0" | sed 's,.*/,,'; }
  74 this_test=$(this_test_)
  75
  76 . $srcdir/../envvar-check
  77
  78 # This is a stub function that is run upon trap (upon regular exit and
  79 # interrupt).  Override it with a per-test function, e.g., to unmount
  80 # a partition, or to undo any other global state changes.
  81 cleanup_() { :; }
  82
  83 t_=$($abs_top_builddir/src/mktemp -d --tmp="$test_dir_" cu-$this_test.XXXXXXXXXX)\
  84     || error_ "failed to create temporary directory in $test_dir_"
  85
  86 # Run each test from within a temporary sub-directory named after the
  87 # test itself, and arrange to remove it upon exception or normal exit.
  88 trap 'st=$?; cleanup_; d='"$t_"';
  89     cd '"$test_dir_"' && chmod -R u+rwx "$d" && rm -rf "$d" && exit $st' 0
  90 trap '(exit $?); exit $?' 1 2 13 15
  91
  92 cd $t_ || error_ "failed to cd to $t_"
  93
  94 if ( diff --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
  95   compare() { diff -u "$@"; }
  96 elif ( cmp --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
  97   compare() { cmp -s "$@"; }
  98 else
  99   compare() { cmp "$@"; }
 100 fi
 101
 102 # Local Variables:
 103 # indent-tabs-mode: nil
 104 # End: