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 # For repeatability, reset the environment to known value.
  38 LANG=C
  39 LC_ALL=C
  40 PAGER=cat
  41 TZ=UTC
  42 TERM=dumb
  43 export LANG LC_ALL PAGER TERM TZ
  44 EDITOR=:
  45 # A call to "unset" with no arguments causes at least Solaris 10
  46 # /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
  47 # deriving from the command substitution clustered with the other
  48 # ones.
  49 unset VISUAL EMAIL LANGUAGE $(perl -e '
  50         my @env = keys %ENV;
  51         my $ok = join("|", qw(
  52                 TRACE
  53                 DEBUG
  54                 USE_LOOKUP
  55                 TEST
  56                 .*_TEST
  57                 PROVE
  58                 VALGRIND
  59         ));
  60         my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  61         print join("\n", @vars);
  62 ')
  63 GIT_AUTHOR_EMAIL=author@example.com
  64 GIT_AUTHOR_NAME='A U Thor'
  65 GIT_COMMITTER_EMAIL=committer@example.com
  66 GIT_COMMITTER_NAME='C O Mitter'
  67 GIT_MERGE_VERBOSITY=5
  68 export GIT_MERGE_VERBOSITY
  69 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
  70 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
  71 export EDITOR
  72
  73 # Protect ourselves from common misconfiguration to export
  74 # CDPATH into the environment
  75 unset CDPATH
  76
  77 unset GREP_OPTIONS
  78
  79 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
  80         1|2|true)
  81                 echo "* warning: Some tests will not work if GIT_TRACE" \
  82                         "is set as to trace on STDERR ! *"
  83                 echo "* warning: Please set GIT_TRACE to something" \
  84                         "other than 1, 2 or true ! *"
  85                 ;;
  86 esac
  87
  88 # Convenience
  89 #
  90 # A regexp to match 5 and 40 hexdigits
  91 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
  92 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
  93
  94 # Zero SHA-1
  95 _z40=0000000000000000000000000000000000000000
  96
  97 # Line feed
  98 LF='
  99 '
 100
 101 # Each test should start with something like this, after copyright notices:
 102 #
 103 # test_description='Description of this test...
 104 # This test checks if command xyzzy does the right thing...
 105 # '
 106 # . ./test-lib.sh
 107 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
 108                 TERM=$ORIGINAL_TERM &&
 109                 export TERM &&
 110                 [ -t 1 ] &&
 111                 tput bold >/dev/null 2>&1 &&
 112                 tput setaf 1 >/dev/null 2>&1 &&
 113                 tput sgr0 >/dev/null 2>&1
 114         ) &&
 115         color=t
 116
 117 while test "$#" -ne 0
 118 do
 119         case "$1" in
 120         -d|--d|--de|--deb|--debu|--debug)
 121                 debug=t; shift ;;
 122         -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 123                 immediate=t; shift ;;
 124         -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 125                 GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 126         -h|--h|--he|--hel|--help)
 127                 help=t; shift ;;
 128         -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 129                 verbose=t; shift ;;
 130         -q|--q|--qu|--qui|--quie|--quiet)
 131                 # Ignore --quiet under a TAP::Harness. Saying how many tests
 132                 # passed without the ok/not ok details is always an error.
 133                 test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 134         --with-dashes)
 135                 with_dashes=t; shift ;;
 136         --no-color)
 137                 color=; shift ;;
 138         --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 139                 valgrind=t; verbose=t; shift ;;
 140         --tee)
 141                 shift ;; # was handled already
 142         --root=*)
 143                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 144                 shift ;;
 145         *)
 146                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
 147         esac
 148 done
 149
 150 if test -n "$color"; then
 151         say_color () {
 152                 (
 153                 TERM=$ORIGINAL_TERM
 154                 export TERM
 155                 case "$1" in
 156                         error) tput bold; tput setaf 1;; # bold red
 157                         skip)  tput bold; tput setaf 2;; # bold green
 158                         pass)  tput setaf 2;;            # green
 159                         info)  tput setaf 3;;            # brown
 160                         *) test -n "$quiet" && return;;
 161                 esac
 162                 shift
 163                 printf "%s" "$*"
 164                 tput sgr0
 165                 echo
 166                 )
 167         }
 168 else
 169         say_color() {
 170                 test -z "$1" && test -n "$quiet" && return
 171                 shift
 172                 echo "$*"
 173         }
 174 fi
 175
 176 error () {
 177         say_color error "error: $*"
 178         GIT_EXIT_OK=t
 179         exit 1
 180 }
 181
 182 say () {
 183         say_color info "$*"
 184 }
 185
 186 test "${test_description}" != "" ||
 187 error "Test script did not set test_description."
 188
 189 if test "$help" = "t"
 190 then
 191         echo "$test_description"
 192         exit 0
 193 fi
 194
 195 exec 5>&1
 196 exec 6<&0
 197 if test "$verbose" = "t"
 198 then
 199         exec 4>&2 3>&1
 200 else
 201         exec 4>/dev/null 3>/dev/null
 202 fi
 203
 204 test_failure=0
 205 test_count=0
 206 test_fixed=0
 207 test_broken=0
 208 test_success=0
 209
 210 test_external_has_tap=0
 211
 212 die () {
 213         code=$?
 214         if test -n "$GIT_EXIT_OK"
 215         then
 216                 exit $code
 217         else
 218                 echo >&5 "FATAL: Unexpected exit with code $code"
 219                 exit 1
 220         fi
 221 }
 222
 223 GIT_EXIT_OK=
 224 trap 'die' EXIT
 225
 226 # The semantics of the editor variables are that of invoking
 227 # sh -c "$EDITOR \"$@\"" files ...
 228 #
 229 # If our trash directory contains shell metacharacters, they will be
 230 # interpreted if we just set $EDITOR directly, so do a little dance with
 231 # environment variables to work around this.
 232 #
 233 # In particular, quoting isn't enough, as the path may contain the same quote
 234 # that we're using.
 235 test_set_editor () {
 236         FAKE_EDITOR="$1"
 237         export FAKE_EDITOR
 238         EDITOR='"$FAKE_EDITOR"'
 239         export EDITOR
 240 }
 241
 242 test_decode_color () {
 243         awk '
 244                 function name(n) {
 245                         if (n == 0) return "RESET";
 246                         if (n == 1) return "BOLD";
 247                         if (n == 30) return "BLACK";
 248                         if (n == 31) return "RED";
 249                         if (n == 32) return "GREEN";
 250                         if (n == 33) return "YELLOW";
 251                         if (n == 34) return "BLUE";
 252                         if (n == 35) return "MAGENTA";
 253                         if (n == 36) return "CYAN";
 254                         if (n == 37) return "WHITE";
 255                         if (n == 40) return "BLACK";
 256                         if (n == 41) return "BRED";
 257                         if (n == 42) return "BGREEN";
 258                         if (n == 43) return "BYELLOW";
 259                         if (n == 44) return "BBLUE";
 260                         if (n == 45) return "BMAGENTA";
 261                         if (n == 46) return "BCYAN";
 262                         if (n == 47) return "BWHITE";
 263                 }
 264                 {
 265                         while (match($0, /\033\[[0-9;]*m/) != 0) {
 266                                 printf "%s<", substr($0, 1, RSTART-1);
 267                                 codes = substr($0, RSTART+2, RLENGTH-3);
 268                                 if (length(codes) == 0)
 269                                         printf "%s", name(0)
 270                                 else {
 271                                         n = split(codes, ary, ";");
 272                                         sep = "";
 273                                         for (i = 1; i <= n; i++) {
 274                                                 printf "%s%s", sep, name(ary[i]);
 275                                                 sep = ";"
 276                                         }
 277                                 }
 278                                 printf ">";
 279                                 $0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1);
 280                         }
 281                         print
 282                 }
 283         '
 284 }
 285
 286 nul_to_q () {
 287         perl -pe 'y/\000/Q/'
 288 }
 289
 290 q_to_nul () {
 291         perl -pe 'y/Q/\000/'
 292 }
 293
 294 q_to_cr () {
 295         tr Q '\015'
 296 }
 297
 298 q_to_tab () {
 299         tr Q '\011'
 300 }
 301
 302 append_cr () {
 303         sed -e 's/$/Q/' | tr Q '\015'
 304 }
 305
 306 remove_cr () {
 307         tr '\015' Q | sed -e 's/Q$//'
 308 }
 309
 310 # In some bourne shell implementations, the "unset" builtin returns
 311 # nonzero status when a variable to be unset was not set in the first
 312 # place.
 313 #
 314 # Use sane_unset when that should not be considered an error.
 315
 316 sane_unset () {
 317         unset "$@"
 318         return 0
 319 }
 320
 321 test_tick () {
 322         if test -z "${test_tick+set}"
 323         then
 324                 test_tick=1112911993
 325         else
 326                 test_tick=$(($test_tick + 60))
 327         fi
 328         GIT_COMMITTER_DATE="$test_tick -0700"
 329         GIT_AUTHOR_DATE="$test_tick -0700"
 330         export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 331 }
 332
 333 # Call test_commit with the arguments "<message> [<file> [<contents>]]"
 334 #
 335 # This will commit a file with the given contents and the given commit
 336 # message.  It will also add a tag with <message> as name.
 337 #
 338 # Both <file> and <contents> default to <message>.
 339
 340 test_commit () {
 341         file=${2:-"$1.t"}
 342         echo "${3-$1}" > "$file" &&
 343         git add "$file" &&
 344         test_tick &&
 345         git commit -m "$1" &&
 346         git tag "$1"
 347 }
 348
 349 # Call test_merge with the arguments "<message> <commit>", where <commit>
 350 # can be a tag pointing to the commit-to-merge.
 351
 352 test_merge () {
 353         test_tick &&
 354         git merge -m "$1" "$2" &&
 355         git tag "$1"
 356 }
 357
 358 # This function helps systems where core.filemode=false is set.
 359 # Use it instead of plain 'chmod +x' to set or unset the executable bit
 360 # of a file in the working directory and add it to the index.
 361
 362 test_chmod () {
 363         chmod "$@" &&
 364         git update-index --add "--chmod=$@"
 365 }
 366
 367 # Unset a configuration variable, but don't fail if it doesn't exist.
 368 test_unconfig () {
 369         git config --unset-all "$@"
 370         config_status=$?
 371         case "$config_status" in
 372         5) # ok, nothing to unset
 373                 config_status=0
 374                 ;;
 375         esac
 376         return $config_status
 377 }
 378
 379 # Set git config, automatically unsetting it after the test is over.
 380 test_config () {
 381         test_when_finished "test_unconfig '$1'" &&
 382         git config "$@"
 383 }
 384
 385
 386 test_config_global () {
 387         test_when_finished "test_unconfig --global '$1'" &&
 388         git config --global "$@"
 389 }
 390
 391 write_script () {
 392         {
 393                 echo "#!${2-"$SHELL_PATH"}" &&
 394                 cat
 395         } >"$1" &&
 396         chmod +x "$1"
 397 }
 398
 399 # Use test_set_prereq to tell that a particular prerequisite is available.
 400 # The prerequisite can later be checked for in two ways:
 401 #
 402 # - Explicitly using test_have_prereq.
 403 #
 404 # - Implicitly by specifying the prerequisite tag in the calls to
 405 #   test_expect_{success,failure,code}.
 406 #
 407 # The single parameter is the prerequisite tag (a simple word, in all
 408 # capital letters by convention).
 409
 410 test_set_prereq () {
 411         satisfied="$satisfied$1 "
 412 }
 413 satisfied=" "
 414
 415 test_have_prereq () {
 416         # prerequisites can be concatenated with ','
 417         save_IFS=$IFS
 418         IFS=,
 419         set -- $*
 420         IFS=$save_IFS
 421
 422         total_prereq=0
 423         ok_prereq=0
 424         missing_prereq=
 425
 426         for prerequisite
 427         do
 428                 total_prereq=$(($total_prereq + 1))
 429                 case $satisfied in
 430                 *" $prerequisite "*)
 431                         ok_prereq=$(($ok_prereq + 1))
 432                         ;;
 433                 *)
 434                         # Keep a list of missing prerequisites
 435                         if test -z "$missing_prereq"
 436                         then
 437                                 missing_prereq=$prerequisite
 438                         else
 439                                 missing_prereq="$prerequisite,$missing_prereq"
 440                         fi
 441                 esac
 442         done
 443
 444         test $total_prereq = $ok_prereq
 445 }
 446
 447 test_declared_prereq () {
 448         case ",$test_prereq," in
 449         *,$1,*)
 450                 return 0
 451                 ;;
 452         esac
 453         return 1
 454 }
 455
 456 # You are not expected to call test_ok_ and test_failure_ directly, use
 457 # the text_expect_* functions instead.
 458
 459 test_ok_ () {
 460         test_success=$(($test_success + 1))
 461         say_color "" "ok $test_count - $@"
 462 }
 463
 464 test_failure_ () {
 465         test_failure=$(($test_failure + 1))
 466         say_color error "not ok - $test_count $1"
 467         shift
 468         echo "$@" | sed -e 's/^/#       /'
 469         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 470 }
 471
 472 test_known_broken_ok_ () {
 473         test_fixed=$(($test_fixed+1))
 474         say_color "" "ok $test_count - $@ # TODO known breakage"
 475 }
 476
 477 test_known_broken_failure_ () {
 478         test_broken=$(($test_broken+1))
 479         say_color skip "not ok $test_count - $@ # TODO known breakage"
 480 }
 481
 482 test_debug () {
 483         test "$debug" = "" || eval "$1"
 484 }
 485
 486 test_eval_ () {
 487         # This is a separate function because some tests use
 488         # "return" to end a test_expect_success block early.
 489         eval </dev/null >&3 2>&4 "$*"
 490 }
 491
 492 test_run_ () {
 493         test_cleanup=:
 494         expecting_failure=$2
 495         test_eval_ "$1"
 496         eval_ret=$?
 497
 498         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 499         then
 500                 test_eval_ "$test_cleanup"
 501         fi
 502         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 503                 echo ""
 504         fi
 505         return "$eval_ret"
 506 }
 507
 508 test_skip () {
 509         test_count=$(($test_count+1))
 510         to_skip=
 511         for skp in $GIT_SKIP_TESTS
 512         do
 513                 case $this_test.$test_count in
 514                 $skp)
 515                         to_skip=t
 516                         break
 517                 esac
 518         done
 519         if test -z "$to_skip" && test -n "$test_prereq" &&
 520            ! test_have_prereq "$test_prereq"
 521         then
 522                 to_skip=t
 523         fi
 524         case "$to_skip" in
 525         t)
 526                 of_prereq=
 527                 if test "$missing_prereq" != "$test_prereq"
 528                 then
 529                         of_prereq=" of $test_prereq"
 530                 fi
 531
 532                 say_color skip >&3 "skipping test: $@"
 533                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 534                 : true
 535                 ;;
 536         *)
 537                 false
 538                 ;;
 539         esac
 540 }
 541
 542 test_expect_failure () {
 543         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 544         test "$#" = 2 ||
 545         error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
 546         export test_prereq
 547         if ! test_skip "$@"
 548         then
 549                 say >&3 "checking known breakage: $2"
 550                 if test_run_ "$2" expecting_failure
 551                 then
 552                         test_known_broken_ok_ "$1"
 553                 else
 554                         test_known_broken_failure_ "$1"
 555                 fi
 556         fi
 557         echo >&3 ""
 558 }
 559
 560 test_expect_success () {
 561         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 562         test "$#" = 2 ||
 563         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 564         export test_prereq
 565         if ! test_skip "$@"
 566         then
 567                 say >&3 "expecting success: $2"
 568                 if test_run_ "$2"
 569                 then
 570                         test_ok_ "$1"
 571                 else
 572                         test_failure_ "$@"
 573                 fi
 574         fi
 575         echo >&3 ""
 576 }
 577
 578 # test_external runs external test scripts that provide continuous
 579 # test output about their progress, and succeeds/fails on
 580 # zero/non-zero exit code.  It outputs the test output on stdout even
 581 # in non-verbose mode, and announces the external script with "# run
 582 # <n>: ..." before running it.  When providing relative paths, keep in
 583 # mind that all scripts run in "trash directory".
 584 # Usage: test_external description command arguments...
 585 # Example: test_external 'Perl API' perl ../path/to/test.pl
 586 test_external () {
 587         test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
 588         test "$#" = 3 ||
 589         error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 590         descr="$1"
 591         shift
 592         export test_prereq
 593         if ! test_skip "$descr" "$@"
 594         then
 595                 # Announce the script to reduce confusion about the
 596                 # test output that follows.
 597                 say_color "" "# run $test_count: $descr ($*)"
 598                 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
 599                 # to be able to use them in script
 600                 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
 601                 # Run command; redirect its stderr to &4 as in
 602                 # test_run_, but keep its stdout on our stdout even in
 603                 # non-verbose mode.
 604                 "$@" 2>&4
 605                 if [ "$?" = 0 ]
 606                 then
 607                         if test $test_external_has_tap -eq 0; then
 608                                 test_ok_ "$descr"
 609                         else
 610                                 say_color "" "# test_external test $descr was ok"
 611                                 test_success=$(($test_success + 1))
 612                         fi
 613                 else
 614                         if test $test_external_has_tap -eq 0; then
 615                                 test_failure_ "$descr" "$@"
 616                         else
 617                                 say_color error "# test_external test $descr failed: $@"
 618                                 test_failure=$(($test_failure + 1))
 619                         fi
 620                 fi
 621         fi
 622 }
 623
 624 # Like test_external, but in addition tests that the command generated
 625 # no output on stderr.
 626 test_external_without_stderr () {
 627         # The temporary file has no (and must have no) security
 628         # implications.
 629         tmp=${TMPDIR:-/tmp}
 630         stderr="$tmp/git-external-stderr.$$.tmp"
 631         test_external "$@" 4> "$stderr"
 632         [ -f "$stderr" ] || error "Internal error: $stderr disappeared."
 633         descr="no stderr: $1"
 634         shift
 635         say >&3 "# expecting no stderr from previous command"
 636         if [ ! -s "$stderr" ]; then
 637                 rm "$stderr"
 638
 639                 if test $test_external_has_tap -eq 0; then
 640                         test_ok_ "$descr"
 641                 else
 642                         say_color "" "# test_external_without_stderr test $descr was ok"
 643                         test_success=$(($test_success + 1))
 644                 fi
 645         else
 646                 if [ "$verbose" = t ]; then
 647                         output=`echo; echo "# Stderr is:"; cat "$stderr"`
 648                 else
 649                         output=
 650                 fi
 651                 # rm first in case test_failure exits.
 652                 rm "$stderr"
 653                 if test $test_external_has_tap -eq 0; then
 654                         test_failure_ "$descr" "$@" "$output"
 655                 else
 656                         say_color error "# test_external_without_stderr test $descr failed: $@: $output"
 657                         test_failure=$(($test_failure + 1))
 658                 fi
 659         fi
 660 }
 661
 662 # debugging-friendly alternatives to "test [-f|-d|-e]"
 663 # The commands test the existence or non-existence of $1. $2 can be
 664 # given to provide a more precise diagnosis.
 665 test_path_is_file () {
 666         if ! [ -f "$1" ]
 667         then
 668                 echo "File $1 doesn't exist. $*"
 669                 false
 670         fi
 671 }
 672
 673 test_path_is_dir () {
 674         if ! [ -d "$1" ]
 675         then
 676                 echo "Directory $1 doesn't exist. $*"
 677                 false
 678         fi
 679 }
 680
 681 test_path_is_missing () {
 682         if [ -e "$1" ]
 683         then
 684                 echo "Path exists:"
 685                 ls -ld "$1"
 686                 if [ $# -ge 1 ]; then
 687                         echo "$*"
 688                 fi
 689                 false
 690         fi
 691 }
 692
 693 # test_line_count checks that a file has the number of lines it
 694 # ought to. For example:
 695 #
 696 #       test_expect_success 'produce exactly one line of output' '
 697 #               do something >output &&
 698 #               test_line_count = 1 output
 699 #       '
 700 #
 701 # is like "test $(wc -l <output) = 1" except that it passes the
 702 # output through when the number of lines is wrong.
 703
 704 test_line_count () {
 705         if test $# != 3
 706         then
 707                 error "bug in the test script: not 3 parameters to test_line_count"
 708         elif ! test $(wc -l <"$3") "$1" "$2"
 709         then
 710                 echo "test_line_count: line count for $3 !$1 $2"
 711                 cat "$3"
 712                 return 1
 713         fi
 714 }
 715
 716 # This is not among top-level (test_expect_success | test_expect_failure)
 717 # but is a prefix that can be used in the test script, like:
 718 #
 719 #       test_expect_success 'complain and die' '
 720 #           do something &&
 721 #           do something else &&
 722 #           test_must_fail git checkout ../outerspace
 723 #       '
 724 #
 725 # Writing this as "! git checkout ../outerspace" is wrong, because
 726 # the failure could be due to a segv.  We want a controlled failure.
 727
 728 test_must_fail () {
 729         "$@"
 730         exit_code=$?
 731         if test $exit_code = 0; then
 732                 echo >&2 "test_must_fail: command succeeded: $*"
 733                 return 1
 734         elif test $exit_code -gt 129 -a $exit_code -le 192; then
 735                 echo >&2 "test_must_fail: died by signal: $*"
 736                 return 1
 737         elif test $exit_code = 127; then
 738                 echo >&2 "test_must_fail: command not found: $*"
 739                 return 1
 740         fi
 741         return 0
 742 }
 743
 744 # Similar to test_must_fail, but tolerates success, too.  This is
 745 # meant to be used in contexts like:
 746 #
 747 #       test_expect_success 'some command works without configuration' '
 748 #               test_might_fail git config --unset all.configuration &&
 749 #               do something
 750 #       '
 751 #
 752 # Writing "git config --unset all.configuration || :" would be wrong,
 753 # because we want to notice if it fails due to segv.
 754
 755 test_might_fail () {
 756         "$@"
 757         exit_code=$?
 758         if test $exit_code -gt 129 -a $exit_code -le 192; then
 759                 echo >&2 "test_might_fail: died by signal: $*"
 760                 return 1
 761         elif test $exit_code = 127; then
 762                 echo >&2 "test_might_fail: command not found: $*"
 763                 return 1
 764         fi
 765         return 0
 766 }
 767
 768 # Similar to test_must_fail and test_might_fail, but check that a
 769 # given command exited with a given exit code. Meant to be used as:
 770 #
 771 #       test_expect_success 'Merge with d/f conflicts' '
 772 #               test_expect_code 1 git merge "merge msg" B master
 773 #       '
 774
 775 test_expect_code () {
 776         want_code=$1
 777         shift
 778         "$@"
 779         exit_code=$?
 780         if test $exit_code = $want_code
 781         then
 782                 return 0
 783         fi
 784
 785         echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
 786         return 1
 787 }
 788
 789 # test_cmp is a helper function to compare actual and expected output.
 790 # You can use it like:
 791 #
 792 #       test_expect_success 'foo works' '
 793 #               echo expected >expected &&
 794 #               foo >actual &&
 795 #               test_cmp expected actual
 796 #       '
 797 #
 798 # This could be written as either "cmp" or "diff -u", but:
 799 # - cmp's output is not nearly as easy to read as diff -u
 800 # - not all diff versions understand "-u"
 801
 802 test_cmp() {
 803         $GIT_TEST_CMP "$@"
 804 }
 805
 806 # This function can be used to schedule some commands to be run
 807 # unconditionally at the end of the test to restore sanity:
 808 #
 809 #       test_expect_success 'test core.capslock' '
 810 #               git config core.capslock true &&
 811 #               test_when_finished "git config --unset core.capslock" &&
 812 #               hello world
 813 #       '
 814 #
 815 # That would be roughly equivalent to
 816 #
 817 #       test_expect_success 'test core.capslock' '
 818 #               git config core.capslock true &&
 819 #               hello world
 820 #               git config --unset core.capslock
 821 #       '
 822 #
 823 # except that the greeting and config --unset must both succeed for
 824 # the test to pass.
 825 #
 826 # Note that under --immediate mode, no clean-up is done to help diagnose
 827 # what went wrong.
 828
 829 test_when_finished () {
 830         test_cleanup="{ $*
 831                 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 832 }
 833
 834 # Most tests can use the created repository, but some may need to create more.
 835 # Usage: test_create_repo <directory>
 836 test_create_repo () {
 837         test "$#" = 1 ||
 838         error "bug in the test script: not 1 parameter to test-create-repo"
 839         repo="$1"
 840         mkdir -p "$repo"
 841         (
 842                 cd "$repo" || error "Cannot setup test environment"
 843                 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
 844                 error "cannot run git init -- have you built things yet?"
 845                 mv .git/hooks .git/hooks-disabled
 846         ) || exit
 847 }
 848
 849 test_done () {
 850         GIT_EXIT_OK=t
 851
 852         if test -z "$HARNESS_ACTIVE"; then
 853                 test_results_dir="$TEST_DIRECTORY/test-results"
 854                 mkdir -p "$test_results_dir"
 855                 test_results_path="$test_results_dir/${0%.sh}-$$.counts"
 856
 857                 cat >>"$test_results_path" <<-EOF
 858                 total $test_count
 859                 success $test_success
 860                 fixed $test_fixed
 861                 broken $test_broken
 862                 failed $test_failure
 863
 864                 EOF
 865         fi
 866
 867         if test "$test_fixed" != 0
 868         then
 869                 say_color pass "# fixed $test_fixed known breakage(s)"
 870         fi
 871         if test "$test_broken" != 0
 872         then
 873                 say_color error "# still have $test_broken known breakage(s)"
 874                 msg="remaining $(($test_count-$test_broken)) test(s)"
 875         else
 876                 msg="$test_count test(s)"
 877         fi
 878         case "$test_failure" in
 879         0)
 880                 # Maybe print SKIP message
 881                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 882
 883                 if test $test_external_has_tap -eq 0; then
 884                         say_color pass "# passed all $msg"
 885                         say "1..$test_count$skip_all"
 886                 fi
 887
 888                 test -d "$remove_trash" &&
 889                 cd "$(dirname "$remove_trash")" &&
 890                 rm -rf "$(basename "$remove_trash")"
 891
 892                 exit 0 ;;
 893
 894         *)
 895                 if test $test_external_has_tap -eq 0; then
 896                         say_color error "# failed $test_failure among $msg"
 897                         say "1..$test_count"
 898                 fi
 899
 900                 exit 1 ;;
 901
 902         esac
 903 }
 904
 905 # Test the binaries we have just built.  The tests are kept in
 906 # t/ subdirectory and are run in 'trash directory' subdirectory.
 907 if test -z "$TEST_DIRECTORY"
 908 then
 909         # We allow tests to override this, in case they want to run tests
 910         # outside of t/, e.g. for running tests on the test library
 911         # itself.
 912         TEST_DIRECTORY=$(pwd)
 913 fi
 914 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
 915
 916 if test -n "$valgrind"
 917 then
 918         make_symlink () {
 919                 test -h "$2" &&
 920                 test "$1" = "$(readlink "$2")" || {
 921                         # be super paranoid
 922                         if mkdir "$2".lock
 923                         then
 924                                 rm -f "$2" &&
 925                                 ln -s "$1" "$2" &&
 926                                 rm -r "$2".lock
 927                         else
 928                                 while test -d "$2".lock
 929                                 do
 930                                         say "Waiting for lock on $2."
 931                                         sleep 1
 932                                 done
 933                         fi
 934                 }
 935         }
 936
 937         make_valgrind_symlink () {
 938                 # handle only executables, unless they are shell libraries that
 939                 # need to be in the exec-path.  We will just use "#!" as a
 940                 # guess for a shell-script, since we have no idea what the user
 941                 # may have configured as the shell path.
 942                 test -x "$1" ||
 943                 test "#!" = "$(head -c 2 <"$1")" ||
 944                 return;
 945
 946                 base=$(basename "$1")
 947                 symlink_target=$GIT_BUILD_DIR/$base
 948                 # do not override scripts
 949                 if test -x "$symlink_target" &&
 950                     test ! -d "$symlink_target" &&
 951                     test "#!" != "$(head -c 2 < "$symlink_target")"
 952                 then
 953                         symlink_target=../valgrind.sh
 954                 fi
 955                 case "$base" in
 956                 *.sh|*.perl)
 957                         symlink_target=../unprocessed-script
 958                 esac
 959                 # create the link, or replace it if it is out of date
 960                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 961         }
 962
 963         # override all git executables in TEST_DIRECTORY/..
 964         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 965         mkdir -p "$GIT_VALGRIND"/bin
 966         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 967         do
 968                 make_valgrind_symlink $file
 969         done
 970         # special-case the mergetools loadables
 971         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 972         OLDIFS=$IFS
 973         IFS=:
 974         for path in $PATH
 975         do
 976                 ls "$path"/git-* 2> /dev/null |
 977                 while read file
 978                 do
 979                         make_valgrind_symlink "$file"
 980                 done
 981         done
 982         IFS=$OLDIFS
 983         PATH=$GIT_VALGRIND/bin:$PATH
 984         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 985         export GIT_VALGRIND
 986 elif test -n "$GIT_TEST_INSTALLED" ; then
 987         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 988         error "Cannot run git from $GIT_TEST_INSTALLED."
 989         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 990         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 991 else # normal case, use ../bin-wrappers only unless $with_dashes:
 992         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 993         if ! test -x "$git_bin_dir/git" ; then
 994                 if test -z "$with_dashes" ; then
 995                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 996                 fi
 997                 with_dashes=t
 998         fi
 999         PATH="$git_bin_dir:$PATH"
1000         GIT_EXEC_PATH=$GIT_BUILD_DIR
1001         if test -n "$with_dashes" ; then
1002                 PATH="$GIT_BUILD_DIR:$PATH"
1003         fi
1004 fi
1005 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
1006 unset GIT_CONFIG
1007 GIT_CONFIG_NOSYSTEM=1
1008 GIT_ATTR_NOSYSTEM=1
1009 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
1010
1011 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
1012
1013 if test -z "$GIT_TEST_CMP"
1014 then
1015         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
1016         then
1017                 GIT_TEST_CMP="$DIFF -c"
1018         else
1019                 GIT_TEST_CMP="$DIFF -u"
1020         fi
1021 fi
1022
1023 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
1024 export GITPERLLIB
1025 test -d "$GIT_BUILD_DIR"/templates/blt || {
1026         error "You haven't built things yet, have you?"
1027 }
1028
1029 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
1030 then
1031         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
1032         export GITPYTHONLIB
1033         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
1034                 error "You haven't built git_remote_helpers yet, have you?"
1035         }
1036 fi
1037
1038 if ! test -x "$GIT_BUILD_DIR"/test-chmtime; then
1039         echo >&2 'You need to build test-chmtime:'
1040         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
1041         exit 1
1042 fi
1043
1044 # Test repository
1045 test="trash directory.$(basename "$0" .sh)"
1046 test -n "$root" && test="$root/$test"
1047 case "$test" in
1048 /*) TRASH_DIRECTORY="$test" ;;
1049  *) TRASH_DIRECTORY="$TEST_DIRECTORY/$test" ;;
1050 esac
1051 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
1052 rm -fr "$test" || {
1053         GIT_EXIT_OK=t
1054         echo >&5 "FATAL: Cannot prepare test area"
1055         exit 1
1056 }
1057
1058 HOME="$TRASH_DIRECTORY"
1059 export HOME
1060
1061 test_create_repo "$test"
1062 # Use -P to resolve symlinks in our working directory so that the cwd
1063 # in subprocesses like git equals our $PWD (for pathname comparisons).
1064 cd -P "$test" || exit 1
1065
1066 this_test=${0##*/}
1067 this_test=${this_test%%-*}
1068 for skp in $GIT_SKIP_TESTS
1069 do
1070         case "$this_test" in
1071         $skp)
1072                 say_color skip >&3 "skipping test $this_test altogether"
1073                 skip_all="skip all tests in $this_test"
1074                 test_done
1075         esac
1076 done
1077
1078 # Provide an implementation of the 'yes' utility
1079 yes () {
1080         if test $# = 0
1081         then
1082                 y=y
1083         else
1084                 y="$*"
1085         fi
1086
1087         while echo "$y"
1088         do
1089                 :
1090         done
1091 }
1092
1093 # Fix some commands on Windows
1094 case $(uname -s) in
1095 *MINGW*)
1096         # Windows has its own (incompatible) sort and find
1097         sort () {
1098                 /usr/bin/sort "$@"
1099         }
1100         find () {
1101                 /usr/bin/find "$@"
1102         }
1103         sum () {
1104                 md5sum "$@"
1105         }
1106         # git sees Windows-style pwd
1107         pwd () {
1108                 builtin pwd -W
1109         }
1110         # no POSIX permissions
1111         # backslashes in pathspec are converted to '/'
1112         # exec does not inherit the PID
1113         test_set_prereq MINGW
1114         test_set_prereq SED_STRIPS_CR
1115         ;;
1116 *CYGWIN*)
1117         test_set_prereq POSIXPERM
1118         test_set_prereq EXECKEEPSPID
1119         test_set_prereq NOT_MINGW
1120         test_set_prereq SED_STRIPS_CR
1121         ;;
1122 *)
1123         test_set_prereq POSIXPERM
1124         test_set_prereq BSLASHPSPEC
1125         test_set_prereq EXECKEEPSPID
1126         test_set_prereq NOT_MINGW
1127         ;;
1128 esac
1129
1130 test -z "$NO_PERL" && test_set_prereq PERL
1131 test -z "$NO_PYTHON" && test_set_prereq PYTHON
1132 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
1133 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
1134
1135 # Can we rely on git's output in the C locale?
1136 if test -n "$GETTEXT_POISON"
1137 then
1138         GIT_GETTEXT_POISON=YesPlease
1139         export GIT_GETTEXT_POISON
1140         test_set_prereq GETTEXT_POISON
1141 else
1142         test_set_prereq C_LOCALE_OUTPUT
1143 fi
1144
1145 # Use this instead of test_cmp to compare files that contain expected and
1146 # actual output from git commands that can be translated.  When running
1147 # under GETTEXT_POISON this pretends that the command produced expected
1148 # results.
1149 test_i18ncmp () {
1150         test -n "$GETTEXT_POISON" || test_cmp "$@"
1151 }
1152
1153 # Use this instead of "grep expected-string actual" to see if the
1154 # output from a git command that can be translated either contains an
1155 # expected string, or does not contain an unwanted one.  When running
1156 # under GETTEXT_POISON this pretends that the command produced expected
1157 # results.
1158 test_i18ngrep () {
1159         if test -n "$GETTEXT_POISON"
1160         then
1161             : # pretend success
1162         elif test "x!" = "x$1"
1163         then
1164                 shift
1165                 ! grep "$@"
1166         else
1167                 grep "$@"
1168         fi
1169 }
1170
1171 # test whether the filesystem supports symbolic links
1172 ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
1173 rm -f y
1174
1175 # When the tests are run as root, permission tests will report that
1176 # things are writable when they shouldn't be.
1177 test -w / || test_set_prereq SANITY