t/test-lib.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see http://www.gnu.org/licenses/ .
  17
  18 # Keep the original TERM for say_color
  19 ORIGINAL_TERM=$TERM
  20
  21 # Test the binaries we have just built.  The tests are kept in
  22 # t/ subdirectory and are run in 'trash directory' subdirectory.
  23 if test -z "$TEST_DIRECTORY"
  24 then
  25         # We allow tests to override this, in case they want to run tests
  26         # outside of t/, e.g. for running tests on the test library
  27         # itself.
  28         TEST_DIRECTORY=$(pwd)
  29 fi
  30 if test -z "$TEST_OUTPUT_DIRECTORY"
  31 then
  32         # Similarly, override this to store the test-results subdir
  33         # elsewhere
  34         TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  35 fi
  36 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  37
  38 ################################################################
  39 # It appears that people try to run tests without building...
  40 "$GIT_BUILD_DIR/git" >/dev/null
  41 if test $? != 1
  42 then
  43         echo >&2 'error: you do not seem to have built git yet.'
  44         exit 1
  45 fi
  46
  47 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  48 export PERL_PATH SHELL_PATH
  49
  50 # if --tee was passed, write the output not only to the terminal, but
  51 # additionally to the file test-results/$BASENAME.out, too.
  52 case "$GIT_TEST_TEE_STARTED, $* " in
  53 done,*)
  54         # do not redirect again
  55         ;;
  56 *' --tee '*|*' --va'*)
  57         mkdir -p test-results
  58         BASE=test-results/$(basename "$0" .sh)
  59         (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
  60          echo $? > $BASE.exit) | tee $BASE.out
  61         test "$(cat $BASE.exit)" = 0
  62         exit
  63         ;;
  64 esac
  65
  66 # For repeatability, reset the environment to known value.
  67 LANG=C
  68 LC_ALL=C
  69 PAGER=cat
  70 TZ=UTC
  71 TERM=dumb
  72 export LANG LC_ALL PAGER TERM TZ
  73 EDITOR=:
  74 # A call to "unset" with no arguments causes at least Solaris 10
  75 # /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
  76 # deriving from the command substitution clustered with the other
  77 # ones.
  78 unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
  79         my @env = keys %ENV;
  80         my $ok = join("|", qw(
  81                 TRACE
  82                 DEBUG
  83                 USE_LOOKUP
  84                 TEST
  85                 .*_TEST
  86                 PROVE
  87                 VALGRIND
  88                 PERF_AGGREGATING_LATER
  89         ));
  90         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  91         print join("\n", @vars);
  92 ')
  93 unset XDG_CONFIG_HOME
  94 GIT_AUTHOR_EMAIL=author@example.com
  95 GIT_AUTHOR_NAME='A U Thor'
  96 GIT_COMMITTER_EMAIL=committer@example.com
  97 GIT_COMMITTER_NAME='C O Mitter'
  98 GIT_MERGE_VERBOSITY=5
  99 GIT_MERGE_AUTOEDIT=no
 100 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 101 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 102 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 103 export EDITOR
 104
 105 # Add libc MALLOC and MALLOC_PERTURB test
 106 # only if we are not executing the test with valgrind
 107 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 108    test -n "$TEST_NO_MALLOC_CHECK"
 109 then
 110         setup_malloc_check () {
 111                 : nothing
 112         }
 113         teardown_malloc_check () {
 114                 : nothing
 115         }
 116 else
 117         setup_malloc_check () {
 118                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
 119                 export MALLOC_CHECK_ MALLOC_PERTURB_
 120         }
 121         teardown_malloc_check () {
 122                 unset MALLOC_CHECK_ MALLOC_PERTURB_
 123         }
 124 fi
 125
 126 # Protect ourselves from common misconfiguration to export
 127 # CDPATH into the environment
 128 unset CDPATH
 129
 130 unset GREP_OPTIONS
 131
 132 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 133 1|2|true)
 134         echo "* warning: Some tests will not work if GIT_TRACE" \
 135                 "is set as to trace on STDERR ! *"
 136         echo "* warning: Please set GIT_TRACE to something" \
 137                 "other than 1, 2 or true ! *"
 138         ;;
 139 esac
 140
 141 # Convenience
 142 #
 143 # A regexp to match 5 and 40 hexdigits
 144 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 145 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 146
 147 # Zero SHA-1
 148 _z40=0000000000000000000000000000000000000000
 149
 150 # Line feed
 151 LF='
 152 '
 153
 154 export _x05 _x40 _z40 LF
 155
 156 # Each test should start with something like this, after copyright notices:
 157 #
 158 # test_description='Description of this test...
 159 # This test checks if command xyzzy does the right thing...
 160 # '
 161 # . ./test-lib.sh
 162 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
 163                 TERM=$ORIGINAL_TERM &&
 164                 export TERM &&
 165                 [ -t 1 ] &&
 166                 tput bold >/dev/null 2>&1 &&
 167                 tput setaf 1 >/dev/null 2>&1 &&
 168                 tput sgr0 >/dev/null 2>&1
 169         ) &&
 170         color=t
 171
 172 while test "$#" -ne 0
 173 do
 174         case "$1" in
 175         -d|--d|--de|--deb|--debu|--debug)
 176                 debug=t; shift ;;
 177         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 178                 immediate=t; shift ;;
 179         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 180                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 181         -h|--h|--he|--hel|--help)
 182                 help=t; shift ;;
 183         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 184                 verbose=t; shift ;;
 185         -q|--q|--qu|--qui|--quie|--quiet)
 186                 # Ignore --quiet under a TAP::Harness. Saying how many tests
 187                 # passed without the ok/not ok details is always an error.
 188                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 189         --with-dashes)
 190                 with_dashes=t; shift ;;
 191         --no-color)
 192                 color=; shift ;;
 193         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 194                 valgrind=t; verbose=t; shift ;;
 195         --tee)
 196                 shift ;; # was handled already
 197         --root=*)
 198                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 199                 shift ;;
 200         *)
 201                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
 202         esac
 203 done
 204
 205 if test -n "$color"
 206 then
 207         say_color () {
 208                 (
 209                 TERM=$ORIGINAL_TERM
 210                 export TERM
 211                 case "$1" in
 212                 error)
 213                         tput bold; tput setaf 1;; # bold red
 214                 skip)
 215                         tput setaf 4;; # blue
 216                 warn)
 217                         tput setaf 3;; # brown/yellow
 218                 pass)
 219                         tput setaf 2;; # green
 220                 info)
 221                         tput setaf 6;; # cyan
 222                 *)
 223                         test -n "$quiet" && return;;
 224                 esac
 225                 shift
 226                 printf "%s" "$*"
 227                 tput sgr0
 228                 echo
 229                 )
 230         }
 231 else
 232         say_color() {
 233                 test -z "$1" && test -n "$quiet" && return
 234                 shift
 235                 printf "%s\n" "$*"
 236         }
 237 fi
 238
 239 error () {
 240         say_color error "error: $*"
 241         GIT_EXIT_OK=t
 242         exit 1
 243 }
 244
 245 say () {
 246         say_color info "$*"
 247 }
 248
 249 test "${test_description}" != "" ||
 250 error "Test script did not set test_description."
 251
 252 if test "$help" = "t"
 253 then
 254         echo "$test_description"
 255         exit 0
 256 fi
 257
 258 exec 5>&1
 259 exec 6<&0
 260 if test "$verbose" = "t"
 261 then
 262         exec 4>&2 3>&1
 263 else
 264         exec 4>/dev/null 3>/dev/null
 265 fi
 266
 267 test_failure=0
 268 test_count=0
 269 test_fixed=0
 270 test_broken=0
 271 test_success=0
 272
 273 test_external_has_tap=0
 274
 275 die () {
 276         code=$?
 277         if test -n "$GIT_EXIT_OK"
 278         then
 279                 exit $code
 280         else
 281                 echo >&5 "FATAL: Unexpected exit with code $code"
 282                 exit 1
 283         fi
 284 }
 285
 286 GIT_EXIT_OK=
 287 trap 'die' EXIT
 288
 289 # The user-facing functions are loaded from a separate file so that
 290 # test_perf subshells can have them too
 291 . "$TEST_DIRECTORY/test-lib-functions.sh"
 292
 293 # You are not expected to call test_ok_ and test_failure_ directly, use
 294 # the text_expect_* functions instead.
 295
 296 test_ok_ () {
 297         test_success=$(($test_success + 1))
 298         say_color "" "ok $test_count - $@"
 299 }
 300
 301 test_failure_ () {
 302         test_failure=$(($test_failure + 1))
 303         say_color error "not ok $test_count - $1"
 304         shift
 305         echo "$@" | sed -e 's/^/#       /'
 306         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 307 }
 308
 309 test_known_broken_ok_ () {
 310         test_fixed=$(($test_fixed+1))
 311         say_color error "ok $test_count - $@ # TODO known breakage vanished"
 312 }
 313
 314 test_known_broken_failure_ () {
 315         test_broken=$(($test_broken+1))
 316         say_color warn "not ok $test_count - $@ # TODO known breakage"
 317 }
 318
 319 test_debug () {
 320         test "$debug" = "" || eval "$1"
 321 }
 322
 323 test_eval_ () {
 324         # This is a separate function because some tests use
 325         # "return" to end a test_expect_success block early.
 326         eval </dev/null >&3 2>&4 "$*"
 327 }
 328
 329 test_run_ () {
 330         test_cleanup=:
 331         expecting_failure=$2
 332         test_eval_ "$1"
 333         eval_ret=$?
 334
 335         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 336         then
 337                 setup_malloc_check
 338                 test_eval_ "$test_cleanup"
 339                 teardown_malloc_check
 340         fi
 341         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 342         then
 343                 echo ""
 344         fi
 345         return "$eval_ret"
 346 }
 347
 348 test_skip () {
 349         test_count=$(($test_count+1))
 350         to_skip=
 351         for skp in $GIT_SKIP_TESTS
 352         do
 353                 case $this_test.$test_count in
 354                 $skp)
 355                         to_skip=t
 356                         break
 357                 esac
 358         done
 359         if test -z "$to_skip" && test -n "$test_prereq" &&
 360            ! test_have_prereq "$test_prereq"
 361         then
 362                 to_skip=t
 363         fi
 364         case "$to_skip" in
 365         t)
 366                 of_prereq=
 367                 if test "$missing_prereq" != "$test_prereq"
 368                 then
 369                         of_prereq=" of $test_prereq"
 370                 fi
 371
 372                 say_color skip >&3 "skipping test: $@"
 373                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 374                 : true
 375                 ;;
 376         *)
 377                 false
 378                 ;;
 379         esac
 380 }
 381
 382 # stub; perf-lib overrides it
 383 test_at_end_hook_ () {
 384         :
 385 }
 386
 387 test_done () {
 388         GIT_EXIT_OK=t
 389
 390         if test -z "$HARNESS_ACTIVE"
 391         then
 392                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 393                 mkdir -p "$test_results_dir"
 394                 base=${0##*/}
 395                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
 396
 397                 cat >>"$test_results_path" <<-EOF
 398                 total $test_count
 399                 success $test_success
 400                 fixed $test_fixed
 401                 broken $test_broken
 402                 failed $test_failure
 403
 404                 EOF
 405         fi
 406
 407         if test "$test_fixed" != 0
 408         then
 409                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
 410         fi
 411         if test "$test_broken" != 0
 412         then
 413                 say_color warn "# still have $test_broken known breakage(s)"
 414         fi
 415         if test "$test_broken" != 0 || test "$test_fixed" != 0
 416         then
 417                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
 418                 msg="remaining $test_remaining test(s)"
 419         else
 420                 test_remaining=$test_count
 421                 msg="$test_count test(s)"
 422         fi
 423         case "$test_failure" in
 424         0)
 425                 # Maybe print SKIP message
 426                 if test -n "$skip_all" && test $test_count -gt 0
 427                 then
 428                         error "Can't use skip_all after running some tests"
 429                 fi
 430                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 431
 432                 if test $test_external_has_tap -eq 0
 433                 then
 434                         if test $test_remaining -gt 0
 435                         then
 436                                 say_color pass "# passed all $msg"
 437                         fi
 438                         say "1..$test_count$skip_all"
 439                 fi
 440
 441                 test -d "$remove_trash" &&
 442                 cd "$(dirname "$remove_trash")" &&
 443                 rm -rf "$(basename "$remove_trash")"
 444
 445                 test_at_end_hook_
 446
 447                 exit 0 ;;
 448
 449         *)
 450                 if test $test_external_has_tap -eq 0
 451                 then
 452                         say_color error "# failed $test_failure among $msg"
 453                         say "1..$test_count"
 454                 fi
 455
 456                 exit 1 ;;
 457
 458         esac
 459 }
 460
 461 if test -n "$valgrind"
 462 then
 463         make_symlink () {
 464                 test -h "$2" &&
 465                 test "$1" = "$(readlink "$2")" || {
 466                         # be super paranoid
 467                         if mkdir "$2".lock
 468                         then
 469                                 rm -f "$2" &&
 470                                 ln -s "$1" "$2" &&
 471                                 rm -r "$2".lock
 472                         else
 473                                 while test -d "$2".lock
 474                                 do
 475                                         say "Waiting for lock on $2."
 476                                         sleep 1
 477                                 done
 478                         fi
 479                 }
 480         }
 481
 482         make_valgrind_symlink () {
 483                 # handle only executables, unless they are shell libraries that
 484                 # need to be in the exec-path.  We will just use "#!" as a
 485                 # guess for a shell-script, since we have no idea what the user
 486                 # may have configured as the shell path.
 487                 test -x "$1" ||
 488                 test "#!" = "$(head -c 2 <"$1")" ||
 489                 return;
 490
 491                 base=$(basename "$1")
 492                 symlink_target=$GIT_BUILD_DIR/$base
 493                 # do not override scripts
 494                 if test -x "$symlink_target" &&
 495                     test ! -d "$symlink_target" &&
 496                     test "#!" != "$(head -c 2 < "$symlink_target")"
 497                 then
 498                         symlink_target=../valgrind.sh
 499                 fi
 500                 case "$base" in
 501                 *.sh|*.perl)
 502                         symlink_target=../unprocessed-script
 503                 esac
 504                 # create the link, or replace it if it is out of date
 505                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 506         }
 507
 508         # override all git executables in TEST_DIRECTORY/..
 509         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 510         mkdir -p "$GIT_VALGRIND"/bin
 511         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 512         do
 513                 make_valgrind_symlink $file
 514         done
 515         # special-case the mergetools loadables
 516         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 517         OLDIFS=$IFS
 518         IFS=:
 519         for path in $PATH
 520         do
 521                 ls "$path"/git-* 2> /dev/null |
 522                 while read file
 523                 do
 524                         make_valgrind_symlink "$file"
 525                 done
 526         done
 527         IFS=$OLDIFS
 528         PATH=$GIT_VALGRIND/bin:$PATH
 529         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 530         export GIT_VALGRIND
 531 elif test -n "$GIT_TEST_INSTALLED"
 532 then
 533         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 534         error "Cannot run git from $GIT_TEST_INSTALLED."
 535         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 536         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 537 else # normal case, use ../bin-wrappers only unless $with_dashes:
 538         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 539         if ! test -x "$git_bin_dir/git"
 540         then
 541                 if test -z "$with_dashes"
 542                 then
 543                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 544                 fi
 545                 with_dashes=t
 546         fi
 547         PATH="$git_bin_dir:$PATH"
 548         GIT_EXEC_PATH=$GIT_BUILD_DIR
 549         if test -n "$with_dashes"
 550         then
 551                 PATH="$GIT_BUILD_DIR:$PATH"
 552         fi
 553 fi
 554 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 555 unset GIT_CONFIG
 556 GIT_CONFIG_NOSYSTEM=1
 557 GIT_ATTR_NOSYSTEM=1
 558 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 559
 560 if test -z "$GIT_TEST_CMP"
 561 then
 562         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 563         then
 564                 GIT_TEST_CMP="$DIFF -c"
 565         else
 566                 GIT_TEST_CMP="$DIFF -u"
 567         fi
 568 fi
 569
 570 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 571 export GITPERLLIB
 572 test -d "$GIT_BUILD_DIR"/templates/blt || {
 573         error "You haven't built things yet, have you?"
 574 }
 575
 576 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 577 then
 578         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 579         export GITPYTHONLIB
 580         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 581                 error "You haven't built git_remote_helpers yet, have you?"
 582         }
 583 fi
 584
 585 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 586 then
 587         echo >&2 'You need to build test-chmtime:'
 588         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 589         exit 1
 590 fi
 591
 592 # Test repository
 593 test="trash directory.$(basename "$0" .sh)"
 594 test -n "$root" && test="$root/$test"
 595 case "$test" in
 596 /*) TRASH_DIRECTORY="$test" ;;
 597  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
 598 esac
 599 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 600 rm -fr "$test" || {
 601         GIT_EXIT_OK=t
 602         echo >&5 "FATAL: Cannot prepare test area"
 603         exit 1
 604 }
 605
 606 HOME="$TRASH_DIRECTORY"
 607 export HOME
 608
 609 if test -z "$TEST_NO_CREATE_REPO"
 610 then
 611         test_create_repo "$test"
 612 else
 613         mkdir -p "$test"
 614 fi
 615 # Use -P to resolve symlinks in our working directory so that the cwd
 616 # in subprocesses like git equals our $PWD (for pathname comparisons).
 617 cd -P "$test" || exit 1
 618
 619 this_test=${0##*/}
 620 this_test=${this_test%%-*}
 621 for skp in $GIT_SKIP_TESTS
 622 do
 623         case "$this_test" in
 624         $skp)
 625                 say_color info >&3 "skipping test $this_test altogether"
 626                 skip_all="skip all tests in $this_test"
 627                 test_done
 628         esac
 629 done
 630
 631 # Provide an implementation of the 'yes' utility
 632 yes () {
 633         if test $# = 0
 634         then
 635                 y=y
 636         else
 637                 y="$*"
 638         fi
 639
 640         while echo "$y"
 641         do
 642                 :
 643         done
 644 }
 645
 646 # Fix some commands on Windows
 647 case $(uname -s) in
 648 *MINGW*)
 649         # Windows has its own (incompatible) sort and find
 650         sort () {
 651                 /usr/bin/sort "$@"
 652         }
 653         find () {
 654                 /usr/bin/find "$@"
 655         }
 656         sum () {
 657                 md5sum "$@"
 658         }
 659         # git sees Windows-style pwd
 660         pwd () {
 661                 builtin pwd -W
 662         }
 663         # no POSIX permissions
 664         # backslashes in pathspec are converted to '/'
 665         # exec does not inherit the PID
 666         test_set_prereq MINGW
 667         test_set_prereq SED_STRIPS_CR
 668         ;;
 669 *CYGWIN*)
 670         test_set_prereq POSIXPERM
 671         test_set_prereq EXECKEEPSPID
 672         test_set_prereq NOT_MINGW
 673         test_set_prereq SED_STRIPS_CR
 674         ;;
 675 *)
 676         test_set_prereq POSIXPERM
 677         test_set_prereq BSLASHPSPEC
 678         test_set_prereq EXECKEEPSPID
 679         test_set_prereq NOT_MINGW
 680         ;;
 681 esac
 682
 683 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 684 test -z "$NO_PERL" && test_set_prereq PERL
 685 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 686 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 687 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 688
 689 # Can we rely on git's output in the C locale?
 690 if test -n "$GETTEXT_POISON"
 691 then
 692         GIT_GETTEXT_POISON=YesPlease
 693         export GIT_GETTEXT_POISON
 694         test_set_prereq GETTEXT_POISON
 695 else
 696         test_set_prereq C_LOCALE_OUTPUT
 697 fi
 698
 699 # Use this instead of test_cmp to compare files that contain expected and
 700 # actual output from git commands that can be translated.  When running
 701 # under GETTEXT_POISON this pretends that the command produced expected
 702 # results.
 703 test_i18ncmp () {
 704         test -n "$GETTEXT_POISON" || test_cmp "$@"
 705 }
 706
 707 # Use this instead of "grep expected-string actual" to see if the
 708 # output from a git command that can be translated either contains an
 709 # expected string, or does not contain an unwanted one.  When running
 710 # under GETTEXT_POISON this pretends that the command produced expected
 711 # results.
 712 test_i18ngrep () {
 713         if test -n "$GETTEXT_POISON"
 714         then
 715             : # pretend success
 716         elif test "x!" = "x$1"
 717         then
 718                 shift
 719                 ! grep "$@"
 720         else
 721                 grep "$@"
 722         fi
 723 }
 724
 725 test_lazy_prereq SYMLINKS '
 726         # test whether the filesystem supports symbolic links
 727         ln -s x y && test -h y
 728 '
 729
 730 test_lazy_prereq CASE_INSENSITIVE_FS '
 731         echo good >CamelCase &&
 732         echo bad >camelcase &&
 733         test "$(cat CamelCase)" != good
 734 '
 735
 736 test_lazy_prereq UTF8_NFD_TO_NFC '
 737         # check whether FS converts nfd unicode to nfc
 738         auml=$(printf "\303\244")
 739         aumlcdiar=$(printf "\141\314\210")
 740         >"$auml" &&
 741         case "$(echo *)" in
 742         "$aumlcdiar")
 743                 true ;;
 744         *)
 745                 false ;;
 746         esac
 747 '
 748
 749 test_lazy_prereq AUTOIDENT '
 750         sane_unset GIT_AUTHOR_NAME &&
 751         sane_unset GIT_AUTHOR_EMAIL &&
 752         git var GIT_AUTHOR_IDENT
 753 '
 754
 755 # When the tests are run as root, permission tests will report that
 756 # things are writable when they shouldn't be.
 757 test -w / || test_set_prereq SANITY