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         eval >&3 2>&4 "$1"
 450         eval_ret=$?
 451         eval >&3 2>&4 "$test_cleanup"
 452         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
 453                 echo ""
 454         fi
 455         return 0
 456 }
 457
 458 test_skip () {
 459         test_count=$(($test_count+1))
 460         to_skip=
 461         for skp in $GIT_SKIP_TESTS
 462         do
 463                 case $this_test.$test_count in
 464                 $skp)
 465                         to_skip=t
 466                         break
 467                 esac
 468         done
 469         if test -z "$to_skip" && test -n "$test_prereq" &&
 470            ! test_have_prereq "$test_prereq"
 471         then
 472                 to_skip=t
 473         fi
 474         case "$to_skip" in
 475         t)
 476                 of_prereq=
 477                 if test "$missing_prereq" != "$test_prereq"
 478                 then
 479                         of_prereq=" of $test_prereq"
 480                 fi
 481
 482                 say_color skip >&3 "skipping test: $@"
 483                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 484                 : true
 485                 ;;
 486         *)
 487                 false
 488                 ;;
 489         esac
 490 }
 491
 492 test_expect_failure () {
 493         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 494         test "$#" = 2 ||
 495         error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
 496         export test_prereq
 497         if ! test_skip "$@"
 498         then
 499                 say >&3 "checking known breakage: $2"
 500                 test_run_ "$2"
 501                 if [ "$?" = 0 -a "$eval_ret" = 0 ]
 502                 then
 503                         test_known_broken_ok_ "$1"
 504                 else
 505                         test_known_broken_failure_ "$1"
 506                 fi
 507         fi
 508         echo >&3 ""
 509 }
 510
 511 test_expect_success () {
 512         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 513         test "$#" = 2 ||
 514         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 515         export test_prereq
 516         if ! test_skip "$@"
 517         then
 518                 say >&3 "expecting success: $2"
 519                 test_run_ "$2"
 520                 if [ "$?" = 0 -a "$eval_ret" = 0 ]
 521                 then
 522                         test_ok_ "$1"
 523                 else
 524                         test_failure_ "$@"
 525                 fi
 526         fi
 527         echo >&3 ""
 528 }
 529
 530 # test_external runs external test scripts that provide continuous
 531 # test output about their progress, and succeeds/fails on
 532 # zero/non-zero exit code.  It outputs the test output on stdout even
 533 # in non-verbose mode, and announces the external script with "# run
 534 # <n>: ..." before running it.  When providing relative paths, keep in
 535 # mind that all scripts run in "trash directory".
 536 # Usage: test_external description command arguments...
 537 # Example: test_external 'Perl API' perl ../path/to/test.pl
 538 test_external () {
 539         test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
 540         test "$#" = 3 ||
 541         error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 542         descr="$1"
 543         shift
 544         export test_prereq
 545         if ! test_skip "$descr" "$@"
 546         then
 547                 # Announce the script to reduce confusion about the
 548                 # test output that follows.
 549                 say_color "" "# run $test_count: $descr ($*)"
 550                 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
 551                 # to be able to use them in script
 552                 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
 553                 # Run command; redirect its stderr to &4 as in
 554                 # test_run_, but keep its stdout on our stdout even in
 555                 # non-verbose mode.
 556                 "$@" 2>&4
 557                 if [ "$?" = 0 ]
 558                 then
 559                         if test $test_external_has_tap -eq 0; then
 560                                 test_ok_ "$descr"
 561                         else
 562                                 say_color "" "# test_external test $descr was ok"
 563                                 test_success=$(($test_success + 1))
 564                         fi
 565                 else
 566                         if test $test_external_has_tap -eq 0; then
 567                                 test_failure_ "$descr" "$@"
 568                         else
 569                                 say_color error "# test_external test $descr failed: $@"
 570                                 test_failure=$(($test_failure + 1))
 571                         fi
 572                 fi
 573         fi
 574 }
 575
 576 # Like test_external, but in addition tests that the command generated
 577 # no output on stderr.
 578 test_external_without_stderr () {
 579         # The temporary file has no (and must have no) security
 580         # implications.
 581         tmp=${TMPDIR:-/tmp}
 582         stderr="$tmp/git-external-stderr.$$.tmp"
 583         test_external "$@" 4> "$stderr"
 584         [ -f "$stderr" ] || error "Internal error: $stderr disappeared."
 585         descr="no stderr: $1"
 586         shift
 587         say >&3 "# expecting no stderr from previous command"
 588         if [ ! -s "$stderr" ]; then
 589                 rm "$stderr"
 590
 591                 if test $test_external_has_tap -eq 0; then
 592                         test_ok_ "$descr"
 593                 else
 594                         say_color "" "# test_external_without_stderr test $descr was ok"
 595                         test_success=$(($test_success + 1))
 596                 fi
 597         else
 598                 if [ "$verbose" = t ]; then
 599                         output=`echo; echo "# Stderr is:"; cat "$stderr"`
 600                 else
 601                         output=
 602                 fi
 603                 # rm first in case test_failure exits.
 604                 rm "$stderr"
 605                 if test $test_external_has_tap -eq 0; then
 606                         test_failure_ "$descr" "$@" "$output"
 607                 else
 608                         say_color error "# test_external_without_stderr test $descr failed: $@: $output"
 609                         test_failure=$(($test_failure + 1))
 610                 fi
 611         fi
 612 }
 613
 614 # debugging-friendly alternatives to "test [-f|-d|-e]"
 615 # The commands test the existence or non-existence of $1. $2 can be
 616 # given to provide a more precise diagnosis.
 617 test_path_is_file () {
 618         if ! [ -f "$1" ]
 619         then
 620                 echo "File $1 doesn't exist. $*"
 621                 false
 622         fi
 623 }
 624
 625 test_path_is_dir () {
 626         if ! [ -d "$1" ]
 627         then
 628                 echo "Directory $1 doesn't exist. $*"
 629                 false
 630         fi
 631 }
 632
 633 test_path_is_missing () {
 634         if [ -e "$1" ]
 635         then
 636                 echo "Path exists:"
 637                 ls -ld "$1"
 638                 if [ $# -ge 1 ]; then
 639                         echo "$*"
 640                 fi
 641                 false
 642         fi
 643 }
 644
 645 # test_line_count checks that a file has the number of lines it
 646 # ought to. For example:
 647 #
 648 #       test_expect_success 'produce exactly one line of output' '
 649 #               do something >output &&
 650 #               test_line_count = 1 output
 651 #       '
 652 #
 653 # is like "test $(wc -l <output) = 1" except that it passes the
 654 # output through when the number of lines is wrong.
 655
 656 test_line_count () {
 657         if test $# != 3
 658         then
 659                 error "bug in the test script: not 3 parameters to test_line_count"
 660         elif ! test $(wc -l <"$3") "$1" "$2"
 661         then
 662                 echo "test_line_count: line count for $3 !$1 $2"
 663                 cat "$3"
 664                 return 1
 665         fi
 666 }
 667
 668 # This is not among top-level (test_expect_success | test_expect_failure)
 669 # but is a prefix that can be used in the test script, like:
 670 #
 671 #       test_expect_success 'complain and die' '
 672 #           do something &&
 673 #           do something else &&
 674 #           test_must_fail git checkout ../outerspace
 675 #       '
 676 #
 677 # Writing this as "! git checkout ../outerspace" is wrong, because
 678 # the failure could be due to a segv.  We want a controlled failure.
 679
 680 test_must_fail () {
 681         "$@"
 682         exit_code=$?
 683         if test $exit_code = 0; then
 684                 echo >&2 "test_must_fail: command succeeded: $*"
 685                 return 1
 686         elif test $exit_code -gt 129 -a $exit_code -le 192; then
 687                 echo >&2 "test_must_fail: died by signal: $*"
 688                 return 1
 689         elif test $exit_code = 127; then
 690                 echo >&2 "test_must_fail: command not found: $*"
 691                 return 1
 692         fi
 693         return 0
 694 }
 695
 696 # Similar to test_must_fail, but tolerates success, too.  This is
 697 # meant to be used in contexts like:
 698 #
 699 #       test_expect_success 'some command works without configuration' '
 700 #               test_might_fail git config --unset all.configuration &&
 701 #               do something
 702 #       '
 703 #
 704 # Writing "git config --unset all.configuration || :" would be wrong,
 705 # because we want to notice if it fails due to segv.
 706
 707 test_might_fail () {
 708         "$@"
 709         exit_code=$?
 710         if test $exit_code -gt 129 -a $exit_code -le 192; then
 711                 echo >&2 "test_might_fail: died by signal: $*"
 712                 return 1
 713         elif test $exit_code = 127; then
 714                 echo >&2 "test_might_fail: command not found: $*"
 715                 return 1
 716         fi
 717         return 0
 718 }
 719
 720 # Similar to test_must_fail and test_might_fail, but check that a
 721 # given command exited with a given exit code. Meant to be used as:
 722 #
 723 #       test_expect_success 'Merge with d/f conflicts' '
 724 #               test_expect_code 1 git merge "merge msg" B master
 725 #       '
 726
 727 test_expect_code () {
 728         want_code=$1
 729         shift
 730         "$@"
 731         exit_code=$?
 732         if test $exit_code = $want_code
 733         then
 734                 return 0
 735         fi
 736
 737         echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
 738         return 1
 739 }
 740
 741 # test_cmp is a helper function to compare actual and expected output.
 742 # You can use it like:
 743 #
 744 #       test_expect_success 'foo works' '
 745 #               echo expected >expected &&
 746 #               foo >actual &&
 747 #               test_cmp expected actual
 748 #       '
 749 #
 750 # This could be written as either "cmp" or "diff -u", but:
 751 # - cmp's output is not nearly as easy to read as diff -u
 752 # - not all diff versions understand "-u"
 753
 754 test_cmp() {
 755         $GIT_TEST_CMP "$@"
 756 }
 757
 758 # This function can be used to schedule some commands to be run
 759 # unconditionally at the end of the test to restore sanity:
 760 #
 761 #       test_expect_success 'test core.capslock' '
 762 #               git config core.capslock true &&
 763 #               test_when_finished "git config --unset core.capslock" &&
 764 #               hello world
 765 #       '
 766 #
 767 # That would be roughly equivalent to
 768 #
 769 #       test_expect_success 'test core.capslock' '
 770 #               git config core.capslock true &&
 771 #               hello world
 772 #               git config --unset core.capslock
 773 #       '
 774 #
 775 # except that the greeting and config --unset must both succeed for
 776 # the test to pass.
 777
 778 test_when_finished () {
 779         test_cleanup="{ $*
 780                 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 781 }
 782
 783 # Most tests can use the created repository, but some may need to create more.
 784 # Usage: test_create_repo <directory>
 785 test_create_repo () {
 786         test "$#" = 1 ||
 787         error "bug in the test script: not 1 parameter to test-create-repo"
 788         repo="$1"
 789         mkdir -p "$repo"
 790         (
 791                 cd "$repo" || error "Cannot setup test environment"
 792                 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
 793                 error "cannot run git init -- have you built things yet?"
 794                 mv .git/hooks .git/hooks-disabled
 795         ) || exit
 796 }
 797
 798 test_done () {
 799         GIT_EXIT_OK=t
 800
 801         if test -z "$HARNESS_ACTIVE"; then
 802                 test_results_dir="$TEST_DIRECTORY/test-results"
 803                 mkdir -p "$test_results_dir"
 804                 test_results_path="$test_results_dir/${0%.sh}-$$.counts"
 805
 806                 cat >>"$test_results_path" <<-EOF
 807                 total $test_count
 808                 success $test_success
 809                 fixed $test_fixed
 810                 broken $test_broken
 811                 failed $test_failure
 812
 813                 EOF
 814         fi
 815
 816         if test "$test_fixed" != 0
 817         then
 818                 say_color pass "# fixed $test_fixed known breakage(s)"
 819         fi
 820         if test "$test_broken" != 0
 821         then
 822                 say_color error "# still have $test_broken known breakage(s)"
 823                 msg="remaining $(($test_count-$test_broken)) test(s)"
 824         else
 825                 msg="$test_count test(s)"
 826         fi
 827         case "$test_failure" in
 828         0)
 829                 # Maybe print SKIP message
 830                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 831
 832                 if test $test_external_has_tap -eq 0; then
 833                         say_color pass "# passed all $msg"
 834                         say "1..$test_count$skip_all"
 835                 fi
 836
 837                 test -d "$remove_trash" &&
 838                 cd "$(dirname "$remove_trash")" &&
 839                 rm -rf "$(basename "$remove_trash")"
 840
 841                 exit 0 ;;
 842
 843         *)
 844                 if test $test_external_has_tap -eq 0; then
 845                         say_color error "# failed $test_failure among $msg"
 846                         say "1..$test_count"
 847                 fi
 848
 849                 exit 1 ;;
 850
 851         esac
 852 }
 853
 854 # Test the binaries we have just built.  The tests are kept in
 855 # t/ subdirectory and are run in 'trash directory' subdirectory.
 856 if test -z "$TEST_DIRECTORY"
 857 then
 858         # We allow tests to override this, in case they want to run tests
 859         # outside of t/, e.g. for running tests on the test library
 860         # itself.
 861         TEST_DIRECTORY=$(pwd)
 862 fi
 863 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
 864
 865 if test -n "$valgrind"
 866 then
 867         make_symlink () {
 868                 test -h "$2" &&
 869                 test "$1" = "$(readlink "$2")" || {
 870                         # be super paranoid
 871                         if mkdir "$2".lock
 872                         then
 873                                 rm -f "$2" &&
 874                                 ln -s "$1" "$2" &&
 875                                 rm -r "$2".lock
 876                         else
 877                                 while test -d "$2".lock
 878                                 do
 879                                         say "Waiting for lock on $2."
 880                                         sleep 1
 881                                 done
 882                         fi
 883                 }
 884         }
 885
 886         make_valgrind_symlink () {
 887                 # handle only executables, unless they are shell libraries that
 888                 # need to be in the exec-path.  We will just use "#!" as a
 889                 # guess for a shell-script, since we have no idea what the user
 890                 # may have configured as the shell path.
 891                 test -x "$1" ||
 892                 test "#!" = "$(head -c 2 <"$1")" ||
 893                 return;
 894
 895                 base=$(basename "$1")
 896                 symlink_target=$GIT_BUILD_DIR/$base
 897                 # do not override scripts
 898                 if test -x "$symlink_target" &&
 899                     test ! -d "$symlink_target" &&
 900                     test "#!" != "$(head -c 2 < "$symlink_target")"
 901                 then
 902                         symlink_target=../valgrind.sh
 903                 fi
 904                 case "$base" in
 905                 *.sh|*.perl)
 906                         symlink_target=../unprocessed-script
 907                 esac
 908                 # create the link, or replace it if it is out of date
 909                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 910         }
 911
 912         # override all git executables in TEST_DIRECTORY/..
 913         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 914         mkdir -p "$GIT_VALGRIND"/bin
 915         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 916         do
 917                 make_valgrind_symlink $file
 918         done
 919         OLDIFS=$IFS
 920         IFS=:
 921         for path in $PATH
 922         do
 923                 ls "$path"/git-* 2> /dev/null |
 924                 while read file
 925                 do
 926                         make_valgrind_symlink "$file"
 927                 done
 928         done
 929         IFS=$OLDIFS
 930         PATH=$GIT_VALGRIND/bin:$PATH
 931         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 932         export GIT_VALGRIND
 933 elif test -n "$GIT_TEST_INSTALLED" ; then
 934         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 935         error "Cannot run git from $GIT_TEST_INSTALLED."
 936         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 937         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 938 else # normal case, use ../bin-wrappers only unless $with_dashes:
 939         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 940         if ! test -x "$git_bin_dir/git" ; then
 941                 if test -z "$with_dashes" ; then
 942                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 943                 fi
 944                 with_dashes=t
 945         fi
 946         PATH="$git_bin_dir:$PATH"
 947         GIT_EXEC_PATH=$GIT_BUILD_DIR
 948         if test -n "$with_dashes" ; then
 949                 PATH="$GIT_BUILD_DIR:$PATH"
 950         fi
 951 fi
 952 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 953 unset GIT_CONFIG
 954 GIT_CONFIG_NOSYSTEM=1
 955 GIT_ATTR_NOSYSTEM=1
 956 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 957
 958 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
 959
 960 if test -z "$GIT_TEST_CMP"
 961 then
 962         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 963         then
 964                 GIT_TEST_CMP="$DIFF -c"
 965         else
 966                 GIT_TEST_CMP="$DIFF -u"
 967         fi
 968 fi
 969
 970 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 971 export GITPERLLIB
 972 test -d "$GIT_BUILD_DIR"/templates/blt || {
 973         error "You haven't built things yet, have you?"
 974 }
 975
 976 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 977 then
 978         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 979         export GITPYTHONLIB
 980         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 981                 error "You haven't built git_remote_helpers yet, have you?"
 982         }
 983 fi
 984
 985 if ! test -x "$GIT_BUILD_DIR"/test-chmtime; then
 986         echo >&2 'You need to build test-chmtime:'
 987         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 988         exit 1
 989 fi
 990
 991 # Test repository
 992 test="trash directory.$(basename "$0" .sh)"
 993 test -n "$root" && test="$root/$test"
 994 case "$test" in
 995 /*) TRASH_DIRECTORY="$test" ;;
 996  *) TRASH_DIRECTORY="$TEST_DIRECTORY/$test" ;;
 997 esac
 998 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 999 rm -fr "$test" || {
1000         GIT_EXIT_OK=t
1001         echo >&5 "FATAL: Cannot prepare test area"
1002         exit 1
1003 }
1004
1005 HOME="$TRASH_DIRECTORY"
1006 export HOME
1007
1008 test_create_repo "$test"
1009 # Use -P to resolve symlinks in our working directory so that the cwd
1010 # in subprocesses like git equals our $PWD (for pathname comparisons).
1011 cd -P "$test" || exit 1
1012
1013 this_test=${0##*/}
1014 this_test=${this_test%%-*}
1015 for skp in $GIT_SKIP_TESTS
1016 do
1017         case "$this_test" in
1018         $skp)
1019                 say_color skip >&3 "skipping test $this_test altogether"
1020                 skip_all="skip all tests in $this_test"
1021                 test_done
1022         esac
1023 done
1024
1025 # Provide an implementation of the 'yes' utility
1026 yes () {
1027         if test $# = 0
1028         then
1029                 y=y
1030         else
1031                 y="$*"
1032         fi
1033
1034         while echo "$y"
1035         do
1036                 :
1037         done
1038 }
1039
1040 # Fix some commands on Windows
1041 case $(uname -s) in
1042 *MINGW*)
1043         # Windows has its own (incompatible) sort and find
1044         sort () {
1045                 /usr/bin/sort "$@"
1046         }
1047         find () {
1048                 /usr/bin/find "$@"
1049         }
1050         sum () {
1051                 md5sum "$@"
1052         }
1053         # git sees Windows-style pwd
1054         pwd () {
1055                 builtin pwd -W
1056         }
1057         # no POSIX permissions
1058         # backslashes in pathspec are converted to '/'
1059         # exec does not inherit the PID
1060         test_set_prereq MINGW
1061         test_set_prereq SED_STRIPS_CR
1062         ;;
1063 *CYGWIN*)
1064         test_set_prereq POSIXPERM
1065         test_set_prereq EXECKEEPSPID
1066         test_set_prereq NOT_MINGW
1067         test_set_prereq SED_STRIPS_CR
1068         ;;
1069 *)
1070         test_set_prereq POSIXPERM
1071         test_set_prereq BSLASHPSPEC
1072         test_set_prereq EXECKEEPSPID
1073         test_set_prereq NOT_MINGW
1074         ;;
1075 esac
1076
1077 test -z "$NO_PERL" && test_set_prereq PERL
1078 test -z "$NO_PYTHON" && test_set_prereq PYTHON
1079 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
1080
1081 # Can we rely on git's output in the C locale?
1082 if test -n "$GETTEXT_POISON"
1083 then
1084         GIT_GETTEXT_POISON=YesPlease
1085         export GIT_GETTEXT_POISON
1086 else
1087         test_set_prereq C_LOCALE_OUTPUT
1088 fi
1089
1090 # Use this instead of test_cmp to compare files that contain expected and
1091 # actual output from git commands that can be translated.  When running
1092 # under GETTEXT_POISON this pretends that the command produced expected
1093 # results.
1094 test_i18ncmp () {
1095         test -n "$GETTEXT_POISON" || test_cmp "$@"
1096 }
1097
1098 # Use this instead of "grep expected-string actual" to see if the
1099 # output from a git command that can be translated either contains an
1100 # expected string, or does not contain an unwanted one.  When running
1101 # under GETTEXT_POISON this pretends that the command produced expected
1102 # results.
1103 test_i18ngrep () {
1104         if test -n "$GETTEXT_POISON"
1105         then
1106             : # pretend success
1107         elif test "x!" = "x$1"
1108         then
1109                 shift
1110                 ! grep "$@"
1111         else
1112                 grep "$@"
1113         fi
1114 }
1115
1116 # test whether the filesystem supports symbolic links
1117 ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
1118 rm -f y
1119
1120 # When the tests are run as root, permission tests will report that
1121 # things are writable when they shouldn't be.
1122 test -w / || test_set_prereq SANITY