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 # if --tee was passed, write the output not only to the terminal, but
  19 # additionally to the file test-results/$BASENAME.out, too.
  20 case "$GIT_TEST_TEE_STARTED, $* " in
  21 done,*)
  22         # do not redirect again
  23         ;;
  24 *' --tee '*|*' --va'*)
  25         mkdir -p test-results
  26         BASE=test-results/$(basename "$0" .sh)
  27         (GIT_TEST_TEE_STARTED=done ${SHELL-sh} "$0" "$@" 2>&1;
  28          echo $? > $BASE.exit) | tee $BASE.out
  29         test "$(cat $BASE.exit)" = 0
  30         exit
  31         ;;
  32 esac
  33
  34 # Keep the original TERM for say_color
  35 ORIGINAL_TERM=$TERM
  36
  37 # Test the binaries we have just built.  The tests are kept in
  38 # t/ subdirectory and are run in 'trash directory' subdirectory.
  39 if test -z "$TEST_DIRECTORY"
  40 then
  41         # We allow tests to override this, in case they want to run tests
  42         # outside of t/, e.g. for running tests on the test library
  43         # itself.
  44         TEST_DIRECTORY=$(pwd)
  45 fi
  46 if test -z "$TEST_OUTPUT_DIRECTORY"
  47 then
  48         # Similarly, override this to store the test-results subdir
  49         # elsewhere
  50         TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  51 fi
  52 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  53
  54 ################################################################
  55 # It appears that people try to run tests without building...
  56 "$GIT_BUILD_DIR/git" >/dev/null
  57 if test $? != 1
  58 then
  59         echo >&2 'error: you do not seem to have built git yet.'
  60         exit 1
  61 fi
  62
  63 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  64 export PERL_PATH SHELL_PATH
  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_"
 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 "$1" in
 212                 error)
 213                         tput bold; tput setaf 1;; # bold red
 214                 skip)
 215                         tput bold; tput setaf 2;; # bold green
 216                 pass)
 217                         tput setaf 2;;            # green
 218                 info)
 219                         tput setaf 3;;            # brown
 220                 *)
 221                         test -n "$quiet" && return;;
 222                 esac
 223                 shift
 224                 printf "%s" "$*"
 225                 tput sgr0
 226                 echo
 227                 )
 228         }
 229 else
 230         say_color() {
 231                 test -z "$1" && test -n "$quiet" && return
 232                 shift
 233                 echo "$*"
 234         }
 235 fi
 236
 237 error () {
 238         say_color error "error: $*"
 239         GIT_EXIT_OK=t
 240         exit 1
 241 }
 242
 243 say () {
 244         say_color info "$*"
 245 }
 246
 247 test "${test_description}" != "" ||
 248 error "Test script did not set test_description."
 249
 250 if test "$help" = "t"
 251 then
 252         echo "$test_description"
 253         exit 0
 254 fi
 255
 256 exec 5>&1
 257 exec 6<&0
 258 if test "$verbose" = "t"
 259 then
 260         exec 4>&2 3>&1
 261 else
 262         exec 4>/dev/null 3>/dev/null
 263 fi
 264
 265 test_failure=0
 266 test_count=0
 267 test_fixed=0
 268 test_broken=0
 269 test_success=0
 270
 271 test_external_has_tap=0
 272
 273 die () {
 274         code=$?
 275         if test -n "$GIT_EXIT_OK"
 276         then
 277                 exit $code
 278         else
 279                 echo >&5 "FATAL: Unexpected exit with code $code"
 280                 exit 1
 281         fi
 282 }
 283
 284 GIT_EXIT_OK=
 285 trap 'die' EXIT
 286
 287 # The user-facing functions are loaded from a separate file so that
 288 # test_perf subshells can have them too
 289 . "$TEST_DIRECTORY/test-lib-functions.sh"
 290
 291 # You are not expected to call test_ok_ and test_failure_ directly, use
 292 # the text_expect_* functions instead.
 293
 294 test_ok_ () {
 295         test_success=$(($test_success + 1))
 296         say_color "" "ok $test_count - $@"
 297 }
 298
 299 test_failure_ () {
 300         test_failure=$(($test_failure + 1))
 301         say_color error "not ok - $test_count $1"
 302         shift
 303         echo "$@" | sed -e 's/^/#       /'
 304         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 305 }
 306
 307 test_known_broken_ok_ () {
 308         test_fixed=$(($test_fixed+1))
 309         say_color "" "ok $test_count - $@ # TODO known breakage"
 310 }
 311
 312 test_known_broken_failure_ () {
 313         test_broken=$(($test_broken+1))
 314         say_color skip "not ok $test_count - $@ # TODO known breakage"
 315 }
 316
 317 test_debug () {
 318         test "$debug" = "" || eval "$1"
 319 }
 320
 321 test_eval_ () {
 322         # This is a separate function because some tests use
 323         # "return" to end a test_expect_success block early.
 324         eval </dev/null >&3 2>&4 "$*"
 325 }
 326
 327 test_run_ () {
 328         test_cleanup=:
 329         expecting_failure=$2
 330         test_eval_ "$1"
 331         eval_ret=$?
 332
 333         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 334         then
 335                 setup_malloc_check
 336                 test_eval_ "$test_cleanup"
 337                 teardown_malloc_check
 338         fi
 339         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 340         then
 341                 echo ""
 342         fi
 343         return "$eval_ret"
 344 }
 345
 346 test_skip () {
 347         test_count=$(($test_count+1))
 348         to_skip=
 349         for skp in $GIT_SKIP_TESTS
 350         do
 351                 case $this_test.$test_count in
 352                 $skp)
 353                         to_skip=t
 354                         break
 355                 esac
 356         done
 357         if test -z "$to_skip" && test -n "$test_prereq" &&
 358            ! test_have_prereq "$test_prereq"
 359         then
 360                 to_skip=t
 361         fi
 362         case "$to_skip" in
 363         t)
 364                 of_prereq=
 365                 if test "$missing_prereq" != "$test_prereq"
 366                 then
 367                         of_prereq=" of $test_prereq"
 368                 fi
 369
 370                 say_color skip >&3 "skipping test: $@"
 371                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 372                 : true
 373                 ;;
 374         *)
 375                 false
 376                 ;;
 377         esac
 378 }
 379
 380 # stub; perf-lib overrides it
 381 test_at_end_hook_ () {
 382         :
 383 }
 384
 385 test_done () {
 386         GIT_EXIT_OK=t
 387
 388         if test -z "$HARNESS_ACTIVE"
 389         then
 390                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 391                 mkdir -p "$test_results_dir"
 392                 test_results_path="$test_results_dir/${0%.sh}-$$.counts"
 393
 394                 cat >>"$test_results_path" <<-EOF
 395                 total $test_count
 396                 success $test_success
 397                 fixed $test_fixed
 398                 broken $test_broken
 399                 failed $test_failure
 400
 401                 EOF
 402         fi
 403
 404         if test "$test_fixed" != 0
 405         then
 406                 say_color pass "# fixed $test_fixed known breakage(s)"
 407         fi
 408         if test "$test_broken" != 0
 409         then
 410                 say_color error "# still have $test_broken known breakage(s)"
 411                 msg="remaining $(($test_count-$test_broken)) test(s)"
 412         else
 413                 msg="$test_count test(s)"
 414         fi
 415         case "$test_failure" in
 416         0)
 417                 # Maybe print SKIP message
 418                 if test -n "$skip_all" && test $test_count -gt 0
 419                 then
 420                         error "Can't use skip_all after running some tests"
 421                 fi
 422                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 423
 424                 if test $test_external_has_tap -eq 0
 425                 then
 426                         if test $test_count -gt 0
 427                         then
 428                                 say_color pass "# passed all $msg"
 429                         fi
 430                         say "1..$test_count$skip_all"
 431                 fi
 432
 433                 test -d "$remove_trash" &&
 434                 cd "$(dirname "$remove_trash")" &&
 435                 rm -rf "$(basename "$remove_trash")"
 436
 437                 test_at_end_hook_
 438
 439                 exit 0 ;;
 440
 441         *)
 442                 if test $test_external_has_tap -eq 0
 443                 then
 444                         say_color error "# failed $test_failure among $msg"
 445                         say "1..$test_count"
 446                 fi
 447
 448                 exit 1 ;;
 449
 450         esac
 451 }
 452
 453 if test -n "$valgrind"
 454 then
 455         make_symlink () {
 456                 test -h "$2" &&
 457                 test "$1" = "$(readlink "$2")" || {
 458                         # be super paranoid
 459                         if mkdir "$2".lock
 460                         then
 461                                 rm -f "$2" &&
 462                                 ln -s "$1" "$2" &&
 463                                 rm -r "$2".lock
 464                         else
 465                                 while test -d "$2".lock
 466                                 do
 467                                         say "Waiting for lock on $2."
 468                                         sleep 1
 469                                 done
 470                         fi
 471                 }
 472         }
 473
 474         make_valgrind_symlink () {
 475                 # handle only executables, unless they are shell libraries that
 476                 # need to be in the exec-path.  We will just use "#!" as a
 477                 # guess for a shell-script, since we have no idea what the user
 478                 # may have configured as the shell path.
 479                 test -x "$1" ||
 480                 test "#!" = "$(head -c 2 <"$1")" ||
 481                 return;
 482
 483                 base=$(basename "$1")
 484                 symlink_target=$GIT_BUILD_DIR/$base
 485                 # do not override scripts
 486                 if test -x "$symlink_target" &&
 487                     test ! -d "$symlink_target" &&
 488                     test "#!" != "$(head -c 2 < "$symlink_target")"
 489                 then
 490                         symlink_target=../valgrind.sh
 491                 fi
 492                 case "$base" in
 493                 *.sh|*.perl)
 494                         symlink_target=../unprocessed-script
 495                 esac
 496                 # create the link, or replace it if it is out of date
 497                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 498         }
 499
 500         # override all git executables in TEST_DIRECTORY/..
 501         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 502         mkdir -p "$GIT_VALGRIND"/bin
 503         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 504         do
 505                 make_valgrind_symlink $file
 506         done
 507         # special-case the mergetools loadables
 508         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 509         OLDIFS=$IFS
 510         IFS=:
 511         for path in $PATH
 512         do
 513                 ls "$path"/git-* 2> /dev/null |
 514                 while read file
 515                 do
 516                         make_valgrind_symlink "$file"
 517                 done
 518         done
 519         IFS=$OLDIFS
 520         PATH=$GIT_VALGRIND/bin:$PATH
 521         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 522         export GIT_VALGRIND
 523 elif test -n "$GIT_TEST_INSTALLED"
 524 then
 525         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 526         error "Cannot run git from $GIT_TEST_INSTALLED."
 527         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 528         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 529 else # normal case, use ../bin-wrappers only unless $with_dashes:
 530         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 531         if ! test -x "$git_bin_dir/git"
 532         then
 533                 if test -z "$with_dashes"
 534                 then
 535                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 536                 fi
 537                 with_dashes=t
 538         fi
 539         PATH="$git_bin_dir:$PATH"
 540         GIT_EXEC_PATH=$GIT_BUILD_DIR
 541         if test -n "$with_dashes"
 542         then
 543                 PATH="$GIT_BUILD_DIR:$PATH"
 544         fi
 545 fi
 546 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 547 unset GIT_CONFIG
 548 GIT_CONFIG_NOSYSTEM=1
 549 GIT_ATTR_NOSYSTEM=1
 550 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 551
 552 if test -z "$GIT_TEST_CMP"
 553 then
 554         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 555         then
 556                 GIT_TEST_CMP="$DIFF -c"
 557         else
 558                 GIT_TEST_CMP="$DIFF -u"
 559         fi
 560 fi
 561
 562 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 563 export GITPERLLIB
 564 test -d "$GIT_BUILD_DIR"/templates/blt || {
 565         error "You haven't built things yet, have you?"
 566 }
 567
 568 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 569 then
 570         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 571         export GITPYTHONLIB
 572         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 573                 error "You haven't built git_remote_helpers yet, have you?"
 574         }
 575 fi
 576
 577 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 578 then
 579         echo >&2 'You need to build test-chmtime:'
 580         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 581         exit 1
 582 fi
 583
 584 # Test repository
 585 test="trash directory.$(basename "$0" .sh)"
 586 test -n "$root" && test="$root/$test"
 587 case "$test" in
 588 /*) TRASH_DIRECTORY="$test" ;;
 589  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
 590 esac
 591 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 592 rm -fr "$test" || {
 593         GIT_EXIT_OK=t
 594         echo >&5 "FATAL: Cannot prepare test area"
 595         exit 1
 596 }
 597
 598 HOME="$TRASH_DIRECTORY"
 599 export HOME
 600
 601 if test -z "$TEST_NO_CREATE_REPO"
 602 then
 603         test_create_repo "$test"
 604 else
 605         mkdir -p "$test"
 606 fi
 607 # Use -P to resolve symlinks in our working directory so that the cwd
 608 # in subprocesses like git equals our $PWD (for pathname comparisons).
 609 cd -P "$test" || exit 1
 610
 611 this_test=${0##*/}
 612 this_test=${this_test%%-*}
 613 for skp in $GIT_SKIP_TESTS
 614 do
 615         case "$this_test" in
 616         $skp)
 617                 say_color skip >&3 "skipping test $this_test altogether"
 618                 skip_all="skip all tests in $this_test"
 619                 test_done
 620         esac
 621 done
 622
 623 # Provide an implementation of the 'yes' utility
 624 yes () {
 625         if test $# = 0
 626         then
 627                 y=y
 628         else
 629                 y="$*"
 630         fi
 631
 632         while echo "$y"
 633         do
 634                 :
 635         done
 636 }
 637
 638 # Fix some commands on Windows
 639 case $(uname -s) in
 640 *MINGW*)
 641         # Windows has its own (incompatible) sort and find
 642         sort () {
 643                 /usr/bin/sort "$@"
 644         }
 645         find () {
 646                 /usr/bin/find "$@"
 647         }
 648         sum () {
 649                 md5sum "$@"
 650         }
 651         # git sees Windows-style pwd
 652         pwd () {
 653                 builtin pwd -W
 654         }
 655         # no POSIX permissions
 656         # backslashes in pathspec are converted to '/'
 657         # exec does not inherit the PID
 658         test_set_prereq MINGW
 659         test_set_prereq SED_STRIPS_CR
 660         ;;
 661 *CYGWIN*)
 662         test_set_prereq POSIXPERM
 663         test_set_prereq EXECKEEPSPID
 664         test_set_prereq NOT_MINGW
 665         test_set_prereq SED_STRIPS_CR
 666         ;;
 667 *)
 668         test_set_prereq POSIXPERM
 669         test_set_prereq BSLASHPSPEC
 670         test_set_prereq EXECKEEPSPID
 671         test_set_prereq NOT_MINGW
 672         ;;
 673 esac
 674
 675 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 676 test -z "$NO_PERL" && test_set_prereq PERL
 677 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 678 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 679 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 680
 681 # Can we rely on git's output in the C locale?
 682 if test -n "$GETTEXT_POISON"
 683 then
 684         GIT_GETTEXT_POISON=YesPlease
 685         export GIT_GETTEXT_POISON
 686         test_set_prereq GETTEXT_POISON
 687 else
 688         test_set_prereq C_LOCALE_OUTPUT
 689 fi
 690
 691 # Use this instead of test_cmp to compare files that contain expected and
 692 # actual output from git commands that can be translated.  When running
 693 # under GETTEXT_POISON this pretends that the command produced expected
 694 # results.
 695 test_i18ncmp () {
 696         test -n "$GETTEXT_POISON" || test_cmp "$@"
 697 }
 698
 699 # Use this instead of "grep expected-string actual" to see if the
 700 # output from a git command that can be translated either contains an
 701 # expected string, or does not contain an unwanted one.  When running
 702 # under GETTEXT_POISON this pretends that the command produced expected
 703 # results.
 704 test_i18ngrep () {
 705         if test -n "$GETTEXT_POISON"
 706         then
 707             : # pretend success
 708         elif test "x!" = "x$1"
 709         then
 710                 shift
 711                 ! grep "$@"
 712         else
 713                 grep "$@"
 714         fi
 715 }
 716
 717 test_lazy_prereq SYMLINKS '
 718         # test whether the filesystem supports symbolic links
 719         ln -s x y && test -h y
 720 '
 721
 722 test_lazy_prereq CASE_INSENSITIVE_FS '
 723         echo good >CamelCase &&
 724         echo bad >camelcase &&
 725         test "$(cat CamelCase)" != good
 726 '
 727
 728 test_lazy_prereq UTF8_NFD_TO_NFC '
 729         # check whether FS converts nfd unicode to nfc
 730         auml=$(printf "\303\244")
 731         aumlcdiar=$(printf "\141\314\210")
 732         >"$auml" &&
 733         case "$(echo *)" in
 734         "$aumlcdiar")
 735                 true ;;
 736         *)
 737                 false ;;
 738         esac
 739 '
 740
 741 # When the tests are run as root, permission tests will report that
 742 # things are writable when they shouldn't be.
 743 test -w / || test_set_prereq SANITY