t/perf/testsuite-recheck.sh

   1 #! /bin/sh
   2 # Copyright (C) 2012-2024 Free Software Foundation, Inc.
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2, or (at your option)
   7 # any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16
  17 # Check performance of recheck target in the face of many failed tests.
  18 # FIXME: this test is not currently able to detect whether the measured
  19 # FIXME: performance is too low, and FAIL accordingly; it just offers an
  20 # FIXME: easy way to verify how effective a performance optimization is.
  21
  22 . test-init.sh
  23
  24 count=5000
  25
  26 cat >> configure.ac <<'END'
  27 AC_OUTPUT
  28 END
  29
  30 cat > Makefile.am <<END
  31 count_expected = $count
  32 TEST_EXTENSIONS = .t
  33 ## Updated later.
  34 TESTS =
  35 END
  36
  37 # This should ensure that our timing won't be disturbed by the time
  38 # that would be actually required to run any of:
  39 #  - the test cases
  40 #  - the test driver executing them
  41 #  - the recipe to create the final test-suite log.
  42 cat >> Makefile.am << 'END'
  43 AUTOMAKE_OPTIONS = -Wno-override
  44 ## These should never be run.
  45 T_LOG_COMPILER = false
  46 T_LOG_DRIVER = false
  47
  48 # The recipe of this also serves as a sanity check.
  49 $(TEST_SUITE_LOG):
  50 ## For debugging.
  51         @echo "RE-RUN:"; for i in $(TEST_LOGS); do echo "  $$i"; done
  52 ## All the test cases should have been re-run.
  53         @count_got=`for i in $(TEST_LOGS); do echo $$i; done | wc -l` \
  54           && echo "Count expected: $(count_expected)" \
  55           && echo "Count obtained: $$count_got" \
  56           && test $$count_got -eq $(count_expected)
  57 ## Pre-existing log files of the tests to re-run should have been
  58 ## removed by the 'recheck' target
  59         @for i in $(TEST_LOGS); do \
  60           test ! -f $$i.log || { echo "$$i.log exists!"; exit 1; }; \
  61         done
  62 ## Actually create the target file, for extra safety.
  63         @echo dummy > $@
  64 END
  65
  66 # Updated later.
  67 : > all
  68
  69 # Temporarily disable shell traces, to avoid bloating the log file.
  70 set +x
  71
  72 for i in $(seq_ 1 $count); do
  73   echo dummy $i > $i.log
  74   echo :global-test-result: PASS > $i.trs
  75   echo :test-result: PASS >> $i.trs
  76   echo :recheck: yes >> $i.trs
  77   echo TESTS += $i.t >> Makefile.am
  78   echo $i >> all
  79 done
  80
  81 # Re-enable shell traces.
  82 set -x
  83
  84 # So that we don't need to create a ton of dummy tests.
  85 echo '$(TESTS):' >> Makefile.am
  86
  87 head -n 100 Makefile.am || : # For debugging.
  88 tail -n 100 Makefile.am || : # Likewise.
  89 cat $count.trs               # Likewise, just the last specimen though.
  90
  91 $ACLOCAL
  92 $AUTOCONF
  93 $AUTOMAKE -a
  94
  95 ./configure
  96 $MAKE recheck
  97
  98 :