kc3-lang/automake/t/self-check-is_newest.tap

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• Hash : c2a52bf0
  Author :
  Date : 2012-06-24T10:36:15
  

  tests: simpler workaround for shells losing the exit status in exit trap
  
  Now that we can assume our tests are run by a decent POSIX shell, we
  can simplify our workaround aimed at having the exit status propagated
  correctly to the code in the exit trap.  Unfortunately, we cannot
  dispense with such a workaround altogether, because it's still required
  by some shells we need to support (at least Solaris 10 /bin/ksh and
  /usr/xpg4/bin/sh).
  
  For more information about the need of that workaround, see the entry
  about 'trap' in the section "Limitations of Shell Builtins" in the
  Autoconf manual:
  <http://www.gnu.org/software/autoconf/manual/autoconf.html#trap>
  
  The new workaround has been tested successfully with the following
  shells:
  
    - Bash 4.1
    - Bash 3.2
    - Bash 3.0
    - Bash 2.05b
    - dash 0.5.5.1
    - dash 0.5.2
    - AT&T Ksh 93u (from official Debian package)
    - MirBSD Korn Shell 40.2 (from official Debian package)
    - Solaris 9, 10 and 11 /bin/ksh
    - Solaris 9, 10 and 11 /usr/xpg4/bin/sh
    - NetBSD 5.1 /bin/sh
    - NetBSD 5.1 /bin/ksh
  
  * t/ax/test-init.sh (Exit): Rename ...
  (_am_exit): ... like this.
  (exit): New alias for '_am_exit'.  We cannot simply redefine 'exit'
  as a shell function, because some shells (dash 0.5.5.1, Solaris 10
  /bin/ksh and /usr/xpg4/bin/sh) do not allow it.
  (_am_exit, trap): Add extra escaping for 'exit' calls, to ensure we
  really invoke the 'exit' builtin and not our alias with the same
  name.
  * configure.ac: Check that the shell selected to run our testsuite
  supports aliases named like shell builtins.
  * t/REAMDE: Adjust.
  * All tests: Adjust, by simply using 'exit' instead of 'Exit'.
  * t/self-check-explicit-skips.sh: Adjust: the first usage of 'exit'
  after it has been redefined as an alias must be on a new line w.r.t.
  that where the alias is defined, in order for the redefinition to be
  honored.
  * syntax-checks.mk (sc_tests_Exit_not_exit): Delete.
  (sc_tests_exit_not_Exit): New.
  (syntax_check_rules): Adjust.
  (sc_tests_automake_fails): Simplify the recipe a little.
  * Several tests: Remove now useless spurious quoting once required
  to placate the 'sc_tests_Exit_not_exit' maintainer check.
  * gen-testsuite-part: Likewise.  Also, avoid uses of 'Exit' in the
  generated scripts.
  
  Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
  

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• t/self-check-is_newest.tap

• #! /bin/sh
  # Copyright (C) 2011-2012 Free Software Foundation, Inc.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation; either version 2, or (at your option)
  # any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  # Sanity check for the automake testsuite: the 'is_newest' subroutine.
  
  . ./defs || exit 1
  
  plan_ 21
  
  # I'm a lazy typist.
  Y () { command_ok_ "is_newest $*" is_newest "$@"; }
  N () { command_ok_ "not is_newest $*" not is_newest "$@"; }
  
  # A simple "touch -r" might not work, since on some file systems, and/or
  # with some 'touch' versions, it might truncate the timestamp (or even
  # rounded it upwards maybe).  So the first (apparently redundant) 'touch'
  # invocation below ensures that the timestamp gets "normalized" in a way
  # that allows it to be correctly copied by the second 'touch' invocation.
  copy_timestamp ()
  {
    touch -r "$1" "$1" && touch -r "$1" "$2"
  }
  
  : > a
  $sleep
  : > b
  : > c
  
  stat a b c || : # For debugging.
  
  Y c a
  Y b a
  N a b
  Y c b
  Y c c
  Y c a b c
  
  copy_timestamp c d
  
  stat c d || : # For debugging.
  
  Y c d
  
  # Should work on directories too, both empty and not-empty.  An older
  # implementation of 'is_newest' failed if the first argument was a
  # directory containing files newer than itself (see automake bug#9147).
  mkdir u x
  touch x/foo
  $sleep
  touch x/foo
  $sleep
  mkdir v y
  touch y/foo
  $sleep
  touch y/foo
  
  stat u v x y x/foo y/foo || : # For debugging.
  
  for older in u x; do
    for newer in v y; do
      Y $newer $older
      N $older $newer
    done
  done
  
  Y x/foo x
  N x x/foo
  
  copy_timestamp x u
  Y x u
  Y u x
  
  # A couple of mild "stress" tests.
  Y y x u v
  Y y u x/foo a b c
  
  :
  

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