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