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