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