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 $ok = join("|", qw(
  81                 TRACE
  82                 DEBUG
  83                 USE_LOOKUP
  84                 TEST
  85                 .*_TEST
  86                 PROVE
  87                 VALGRIND
  88                 UNZIP
  89                 PERF_
  90         ));
  91         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  92         print join("\n", @vars);
  93 ')
  94 unset XDG_CONFIG_HOME
  95 GIT_AUTHOR_EMAIL=author@example.com
  96 GIT_AUTHOR_NAME='A U Thor'
  97 GIT_COMMITTER_EMAIL=committer@example.com
  98 GIT_COMMITTER_NAME='C O Mitter'
  99 GIT_MERGE_VERBOSITY=5
 100 GIT_MERGE_AUTOEDIT=no
 101 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 102 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 103 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 104 export EDITOR
 105
 106 # Add libc MALLOC and MALLOC_PERTURB test
 107 # only if we are not executing the test with valgrind
 108 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 109    test -n "$TEST_NO_MALLOC_CHECK"
 110 then
 111         setup_malloc_check () {
 112                 : nothing
 113         }
 114         teardown_malloc_check () {
 115                 : nothing
 116         }
 117 else
 118         setup_malloc_check () {
 119                 MALLOC_CHECK_=3 MALLOC_PERTURB_=165
 120                 export MALLOC_CHECK_ MALLOC_PERTURB_
 121         }
 122         teardown_malloc_check () {
 123                 unset MALLOC_CHECK_ MALLOC_PERTURB_
 124         }
 125 fi
 126
 127 # Protect ourselves from common misconfiguration to export
 128 # CDPATH into the environment
 129 unset CDPATH
 130
 131 unset GREP_OPTIONS
 132 unset UNZIP
 133
 134 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 135 1|2|true)
 136         echo "* warning: Some tests will not work if GIT_TRACE" \
 137                 "is set as to trace on STDERR ! *"
 138         echo "* warning: Please set GIT_TRACE to something" \
 139                 "other than 1, 2 or true ! *"
 140         ;;
 141 esac
 142
 143 # Convenience
 144 #
 145 # A regexp to match 5 and 40 hexdigits
 146 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 147 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 148
 149 # Zero SHA-1
 150 _z40=0000000000000000000000000000000000000000
 151
 152 # Line feed
 153 LF='
 154 '
 155
 156 export _x05 _x40 _z40 LF
 157
 158 # Each test should start with something like this, after copyright notices:
 159 #
 160 # test_description='Description of this test...
 161 # This test checks if command xyzzy does the right thing...
 162 # '
 163 # . ./test-lib.sh
 164 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
 165                 TERM=$ORIGINAL_TERM &&
 166                 export TERM &&
 167                 [ -t 1 ] &&
 168                 tput bold >/dev/null 2>&1 &&
 169                 tput setaf 1 >/dev/null 2>&1 &&
 170                 tput sgr0 >/dev/null 2>&1
 171         ) &&
 172         color=t
 173
 174 while test "$#" -ne 0
 175 do
 176         case "$1" in
 177         -d|--d|--de|--deb|--debu|--debug)
 178                 debug=t; shift ;;
 179         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 180                 immediate=t; shift ;;
 181         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 182                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 183         -h|--h|--he|--hel|--help)
 184                 help=t; shift ;;
 185         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 186                 verbose=t; shift ;;
 187         -q|--q|--qu|--qui|--quie|--quiet)
 188                 # Ignore --quiet under a TAP::Harness. Saying how many tests
 189                 # passed without the ok/not ok details is always an error.
 190                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 191         --with-dashes)
 192                 with_dashes=t; shift ;;
 193         --no-color)
 194                 color=; shift ;;
 195         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 196                 valgrind=t; verbose=t; shift ;;
 197         --tee)
 198                 shift ;; # was handled already
 199         --root=*)
 200                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 201                 shift ;;
 202         *)
 203                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
 204         esac
 205 done
 206
 207 if test -n "$color"
 208 then
 209         say_color () {
 210                 (
 211                 TERM=$ORIGINAL_TERM
 212                 export TERM
 213                 case "$1" in
 214                 error)
 215                         tput bold; tput setaf 1;; # bold red
 216                 skip)
 217                         tput bold; tput setaf 2;; # bold green
 218                 pass)
 219                         tput setaf 2;;            # green
 220                 info)
 221                         tput setaf 3;;            # brown
 222                 *)
 223                         test -n "$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 "" "ok $test_count - $@ # TODO known breakage"
 312 }
 313
 314 test_known_broken_failure_ () {
 315         test_broken=$(($test_broken+1))
 316         say_color skip "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 pass "# fixed $test_fixed known breakage(s)"
 410         fi
 411         if test "$test_broken" != 0
 412         then
 413                 say_color error "# still have $test_broken known breakage(s)"
 414                 msg="remaining $(($test_count-$test_broken)) test(s)"
 415         else
 416                 msg="$test_count test(s)"
 417         fi
 418         case "$test_failure" in
 419         0)
 420                 # Maybe print SKIP message
 421                 if test -n "$skip_all" && test $test_count -gt 0
 422                 then
 423                         error "Can't use skip_all after running some tests"
 424                 fi
 425                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 426
 427                 if test $test_external_has_tap -eq 0
 428                 then
 429                         if test $test_count -gt 0
 430                         then
 431                                 say_color pass "# passed all $msg"
 432                         fi
 433                         say "1..$test_count$skip_all"
 434                 fi
 435
 436                 test -d "$remove_trash" &&
 437                 cd "$(dirname "$remove_trash")" &&
 438                 rm -rf "$(basename "$remove_trash")"
 439
 440                 test_at_end_hook_
 441
 442                 exit 0 ;;
 443
 444         *)
 445                 if test $test_external_has_tap -eq 0
 446                 then
 447                         say_color error "# failed $test_failure among $msg"
 448                         say "1..$test_count"
 449                 fi
 450
 451                 exit 1 ;;
 452
 453         esac
 454 }
 455
 456 if test -n "$valgrind"
 457 then
 458         make_symlink () {
 459                 test -h "$2" &&
 460                 test "$1" = "$(readlink "$2")" || {
 461                         # be super paranoid
 462                         if mkdir "$2".lock
 463                         then
 464                                 rm -f "$2" &&
 465                                 ln -s "$1" "$2" &&
 466                                 rm -r "$2".lock
 467                         else
 468                                 while test -d "$2".lock
 469                                 do
 470                                         say "Waiting for lock on $2."
 471                                         sleep 1
 472                                 done
 473                         fi
 474                 }
 475         }
 476
 477         make_valgrind_symlink () {
 478                 # handle only executables, unless they are shell libraries that
 479                 # need to be in the exec-path.  We will just use "#!" as a
 480                 # guess for a shell-script, since we have no idea what the user
 481                 # may have configured as the shell path.
 482                 test -x "$1" ||
 483                 test "#!" = "$(head -c 2 <"$1")" ||
 484                 return;
 485
 486                 base=$(basename "$1")
 487                 symlink_target=$GIT_BUILD_DIR/$base
 488                 # do not override scripts
 489                 if test -x "$symlink_target" &&
 490                     test ! -d "$symlink_target" &&
 491                     test "#!" != "$(head -c 2 < "$symlink_target")"
 492                 then
 493                         symlink_target=../valgrind.sh
 494                 fi
 495                 case "$base" in
 496                 *.sh|*.perl)
 497                         symlink_target=../unprocessed-script
 498                 esac
 499                 # create the link, or replace it if it is out of date
 500                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 501         }
 502
 503         # override all git executables in TEST_DIRECTORY/..
 504         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 505         mkdir -p "$GIT_VALGRIND"/bin
 506         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 507         do
 508                 make_valgrind_symlink $file
 509         done
 510         # special-case the mergetools loadables
 511         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 512         OLDIFS=$IFS
 513         IFS=:
 514         for path in $PATH
 515         do
 516                 ls "$path"/git-* 2> /dev/null |
 517                 while read file
 518                 do
 519                         make_valgrind_symlink "$file"
 520                 done
 521         done
 522         IFS=$OLDIFS
 523         PATH=$GIT_VALGRIND/bin:$PATH
 524         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 525         export GIT_VALGRIND
 526 elif test -n "$GIT_TEST_INSTALLED"
 527 then
 528         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 529         error "Cannot run git from $GIT_TEST_INSTALLED."
 530         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 531         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 532 else # normal case, use ../bin-wrappers only unless $with_dashes:
 533         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 534         if ! test -x "$git_bin_dir/git"
 535         then
 536                 if test -z "$with_dashes"
 537                 then
 538                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 539                 fi
 540                 with_dashes=t
 541         fi
 542         PATH="$git_bin_dir:$PATH"
 543         GIT_EXEC_PATH=$GIT_BUILD_DIR
 544         if test -n "$with_dashes"
 545         then
 546                 PATH="$GIT_BUILD_DIR:$PATH"
 547         fi
 548 fi
 549 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 550 unset GIT_CONFIG
 551 GIT_CONFIG_NOSYSTEM=1
 552 GIT_ATTR_NOSYSTEM=1
 553 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 554
 555 if test -z "$GIT_TEST_CMP"
 556 then
 557         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 558         then
 559                 GIT_TEST_CMP="$DIFF -c"
 560         else
 561                 GIT_TEST_CMP="$DIFF -u"
 562         fi
 563 fi
 564
 565 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 566 export GITPERLLIB
 567 test -d "$GIT_BUILD_DIR"/templates/blt || {
 568         error "You haven't built things yet, have you?"
 569 }
 570
 571 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 572 then
 573         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 574         export GITPYTHONLIB
 575         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 576                 error "You haven't built git_remote_helpers yet, have you?"
 577         }
 578 fi
 579
 580 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 581 then
 582         echo >&2 'You need to build test-chmtime:'
 583         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 584         exit 1
 585 fi
 586
 587 # Test repository
 588 test="trash directory.$(basename "$0" .sh)"
 589 test -n "$root" && test="$root/$test"
 590 case "$test" in
 591 /*) TRASH_DIRECTORY="$test" ;;
 592  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
 593 esac
 594 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 595 rm -fr "$test" || {
 596         GIT_EXIT_OK=t
 597         echo >&5 "FATAL: Cannot prepare test area"
 598         exit 1
 599 }
 600
 601 HOME="$TRASH_DIRECTORY"
 602 export HOME
 603
 604 if test -z "$TEST_NO_CREATE_REPO"
 605 then
 606         test_create_repo "$test"
 607 else
 608         mkdir -p "$test"
 609 fi
 610 # Use -P to resolve symlinks in our working directory so that the cwd
 611 # in subprocesses like git equals our $PWD (for pathname comparisons).
 612 cd -P "$test" || exit 1
 613
 614 this_test=${0##*/}
 615 this_test=${this_test%%-*}
 616 for skp in $GIT_SKIP_TESTS
 617 do
 618         case "$this_test" in
 619         $skp)
 620                 say_color skip >&3 "skipping test $this_test altogether"
 621                 skip_all="skip all tests in $this_test"
 622                 test_done
 623         esac
 624 done
 625
 626 # Provide an implementation of the 'yes' utility
 627 yes () {
 628         if test $# = 0
 629         then
 630                 y=y
 631         else
 632                 y="$*"
 633         fi
 634
 635         while echo "$y"
 636         do
 637                 :
 638         done
 639 }
 640
 641 # Fix some commands on Windows
 642 case $(uname -s) in
 643 *MINGW*)
 644         # Windows has its own (incompatible) sort and find
 645         sort () {
 646                 /usr/bin/sort "$@"
 647         }
 648         find () {
 649                 /usr/bin/find "$@"
 650         }
 651         sum () {
 652                 md5sum "$@"
 653         }
 654         # git sees Windows-style pwd
 655         pwd () {
 656                 builtin pwd -W
 657         }
 658         # no POSIX permissions
 659         # backslashes in pathspec are converted to '/'
 660         # exec does not inherit the PID
 661         test_set_prereq MINGW
 662         test_set_prereq SED_STRIPS_CR
 663         ;;
 664 *CYGWIN*)
 665         test_set_prereq POSIXPERM
 666         test_set_prereq EXECKEEPSPID
 667         test_set_prereq NOT_MINGW
 668         test_set_prereq SED_STRIPS_CR
 669         ;;
 670 *)
 671         test_set_prereq POSIXPERM
 672         test_set_prereq BSLASHPSPEC
 673         test_set_prereq EXECKEEPSPID
 674         test_set_prereq NOT_MINGW
 675         ;;
 676 esac
 677
 678 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 679 test -z "$NO_PERL" && test_set_prereq PERL
 680 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 681 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 682 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 683
 684 # Can we rely on git's output in the C locale?
 685 if test -n "$GETTEXT_POISON"
 686 then
 687         GIT_GETTEXT_POISON=YesPlease
 688         export GIT_GETTEXT_POISON
 689         test_set_prereq GETTEXT_POISON
 690 else
 691         test_set_prereq C_LOCALE_OUTPUT
 692 fi
 693
 694 # Use this instead of test_cmp to compare files that contain expected and
 695 # actual output from git commands that can be translated.  When running
 696 # under GETTEXT_POISON this pretends that the command produced expected
 697 # results.
 698 test_i18ncmp () {
 699         test -n "$GETTEXT_POISON" || test_cmp "$@"
 700 }
 701
 702 # Use this instead of "grep expected-string actual" to see if the
 703 # output from a git command that can be translated either contains an
 704 # expected string, or does not contain an unwanted one.  When running
 705 # under GETTEXT_POISON this pretends that the command produced expected
 706 # results.
 707 test_i18ngrep () {
 708         if test -n "$GETTEXT_POISON"
 709         then
 710             : # pretend success
 711         elif test "x!" = "x$1"
 712         then
 713                 shift
 714                 ! grep "$@"
 715         else
 716                 grep "$@"
 717         fi
 718 }
 719
 720 test_lazy_prereq SYMLINKS '
 721         # test whether the filesystem supports symbolic links
 722         ln -s x y && test -h y
 723 '
 724
 725 test_lazy_prereq CASE_INSENSITIVE_FS '
 726         echo good >CamelCase &&
 727         echo bad >camelcase &&
 728         test "$(cat CamelCase)" != good
 729 '
 730
 731 test_lazy_prereq UTF8_NFD_TO_NFC '
 732         # check whether FS converts nfd unicode to nfc
 733         auml=$(printf "\303\244")
 734         aumlcdiar=$(printf "\141\314\210")
 735         >"$auml" &&
 736         case "$(echo *)" in
 737         "$aumlcdiar")
 738                 true ;;
 739         *)
 740                 false ;;
 741         esac
 742 '
 743
 744 test_lazy_prereq AUTOIDENT '
 745         sane_unset GIT_AUTHOR_NAME &&
 746         sane_unset GIT_AUTHOR_EMAIL &&
 747         git var GIT_AUTHOR_IDENT
 748 '
 749
 750 # When the tests are run as root, permission tests will report that
 751 # things are writable when they shouldn't be.
 752 test -w / || test_set_prereq SANITY