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

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• Hash : 63e07a9c
  Author :
  Date : 2012-04-26T10:52:48
  

  tests: fix a spurious failure due to truncated timestamps
  
  Fixes automake bug#11346.
  
  * t/self-check-is_newest.tap: Apparently, on some systems (or file
  systems), "touch -r" can truncate timestamps :-(  Work around that.
  
  Co-authored-by: Peter Breitenlohner <peb@mppmu.mpg.de>
  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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