t/test-lib-functions.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 # The semantics of the editor variables are that of invoking
  19 # sh -c "$EDITOR \"$@\"" files ...
  20 #
  21 # If our trash directory contains shell metacharacters, they will be
  22 # interpreted if we just set $EDITOR directly, so do a little dance with
  23 # environment variables to work around this.
  24 #
  25 # In particular, quoting isn't enough, as the path may contain the same quote
  26 # that we're using.
  27 test_set_editor () {
  28         FAKE_EDITOR="$1"
  29         export FAKE_EDITOR
  30         EDITOR='"$FAKE_EDITOR"'
  31         export EDITOR
  32 }
  33
  34 test_decode_color () {
  35         awk '
  36                 function name(n) {
  37                         if (n == 0) return "RESET";
  38                         if (n == 1) return "BOLD";
  39                         if (n == 30) return "BLACK";
  40                         if (n == 31) return "RED";
  41                         if (n == 32) return "GREEN";
  42                         if (n == 33) return "YELLOW";
  43                         if (n == 34) return "BLUE";
  44                         if (n == 35) return "MAGENTA";
  45                         if (n == 36) return "CYAN";
  46                         if (n == 37) return "WHITE";
  47                         if (n == 40) return "BLACK";
  48                         if (n == 41) return "BRED";
  49                         if (n == 42) return "BGREEN";
  50                         if (n == 43) return "BYELLOW";
  51                         if (n == 44) return "BBLUE";
  52                         if (n == 45) return "BMAGENTA";
  53                         if (n == 46) return "BCYAN";
  54                         if (n == 47) return "BWHITE";
  55                 }
  56                 {
  57                         while (match($0, /\033\[[0-9;]*m/) != 0) {
  58                                 printf "%s<", substr($0, 1, RSTART-1);
  59                                 codes = substr($0, RSTART+2, RLENGTH-3);
  60                                 if (length(codes) == 0)
  61                                         printf "%s", name(0)
  62                                 else {
  63                                         n = split(codes, ary, ";");
  64                                         sep = "";
  65                                         for (i = 1; i <= n; i++) {
  66                                                 printf "%s%s", sep, name(ary[i]);
  67                                                 sep = ";"
  68                                         }
  69                                 }
  70                                 printf ">";
  71                                 $0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1);
  72                         }
  73                         print
  74                 }
  75         '
  76 }
  77
  78 nul_to_q () {
  79         "$PERL_PATH" -pe 'y/\000/Q/'
  80 }
  81
  82 q_to_nul () {
  83         "$PERL_PATH" -pe 'y/Q/\000/'
  84 }
  85
  86 q_to_cr () {
  87         tr Q '\015'
  88 }
  89
  90 q_to_tab () {
  91         tr Q '\011'
  92 }
  93
  94 append_cr () {
  95         sed -e 's/$/Q/' | tr Q '\015'
  96 }
  97
  98 remove_cr () {
  99         tr '\015' Q | sed -e 's/Q$//'
 100 }
 101
 102 # In some bourne shell implementations, the "unset" builtin returns
 103 # nonzero status when a variable to be unset was not set in the first
 104 # place.
 105 #
 106 # Use sane_unset when that should not be considered an error.
 107
 108 sane_unset () {
 109         unset "$@"
 110         return 0
 111 }
 112
 113 test_tick () {
 114         if test -z "${test_tick+set}"
 115         then
 116                 test_tick=1112911993
 117         else
 118                 test_tick=$(($test_tick + 60))
 119         fi
 120         GIT_COMMITTER_DATE="$test_tick -0700"
 121         GIT_AUTHOR_DATE="$test_tick -0700"
 122         export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 123 }
 124
 125 # Stop execution and start a shell. This is useful for debugging tests and
 126 # only makes sense together with "-v".
 127 #
 128 # Be sure to remove all invocations of this command before submitting.
 129
 130 test_pause () {
 131         if test "$verbose" = t; then
 132                 "$SHELL_PATH" <&6 >&3 2>&4
 133         else
 134                 error >&5 "test_pause requires --verbose"
 135         fi
 136 }
 137
 138 # Call test_commit with the arguments "<message> [<file> [<contents>]]"
 139 #
 140 # This will commit a file with the given contents and the given commit
 141 # message.  It will also add a tag with <message> as name.
 142 #
 143 # Both <file> and <contents> default to <message>.
 144
 145 test_commit () {
 146         notick= &&
 147         signoff= &&
 148         while test $# != 0
 149         do
 150                 case "$1" in
 151                 --notick)
 152                         notick=yes
 153                         ;;
 154                 --signoff)
 155                         signoff="$1"
 156                         ;;
 157                 *)
 158                         break
 159                         ;;
 160                 esac
 161                 shift
 162         done &&
 163         file=${2:-"$1.t"} &&
 164         echo "${3-$1}" > "$file" &&
 165         git add "$file" &&
 166         if test -z "$notick"
 167         then
 168                 test_tick
 169         fi &&
 170         git commit $signoff -m "$1" &&
 171         git tag "$1"
 172 }
 173
 174 # Call test_merge with the arguments "<message> <commit>", where <commit>
 175 # can be a tag pointing to the commit-to-merge.
 176
 177 test_merge () {
 178         test_tick &&
 179         git merge -m "$1" "$2" &&
 180         git tag "$1"
 181 }
 182
 183 # This function helps systems where core.filemode=false is set.
 184 # Use it instead of plain 'chmod +x' to set or unset the executable bit
 185 # of a file in the working directory and add it to the index.
 186
 187 test_chmod () {
 188         chmod "$@" &&
 189         git update-index --add "--chmod=$@"
 190 }
 191
 192 # Unset a configuration variable, but don't fail if it doesn't exist.
 193 test_unconfig () {
 194         git config --unset-all "$@"
 195         config_status=$?
 196         case "$config_status" in
 197         5) # ok, nothing to unset
 198                 config_status=0
 199                 ;;
 200         esac
 201         return $config_status
 202 }
 203
 204 # Set git config, automatically unsetting it after the test is over.
 205 test_config () {
 206         test_when_finished "test_unconfig '$1'" &&
 207         git config "$@"
 208 }
 209
 210 test_config_global () {
 211         test_when_finished "test_unconfig --global '$1'" &&
 212         git config --global "$@"
 213 }
 214
 215 write_script () {
 216         {
 217                 echo "#!${2-"$SHELL_PATH"}" &&
 218                 cat
 219         } >"$1" &&
 220         chmod +x "$1"
 221 }
 222
 223 # Use test_set_prereq to tell that a particular prerequisite is available.
 224 # The prerequisite can later be checked for in two ways:
 225 #
 226 # - Explicitly using test_have_prereq.
 227 #
 228 # - Implicitly by specifying the prerequisite tag in the calls to
 229 #   test_expect_{success,failure,code}.
 230 #
 231 # The single parameter is the prerequisite tag (a simple word, in all
 232 # capital letters by convention).
 233
 234 test_set_prereq () {
 235         satisfied_prereq="$satisfied_prereq$1 "
 236 }
 237 satisfied_prereq=" "
 238 lazily_testable_prereq= lazily_tested_prereq=
 239
 240 # Usage: test_lazy_prereq PREREQ 'script'
 241 test_lazy_prereq () {
 242         lazily_testable_prereq="$lazily_testable_prereq$1 "
 243         eval test_prereq_lazily_$1=\$2
 244 }
 245
 246 test_run_lazy_prereq_ () {
 247         script='
 248 mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" &&
 249 (
 250         cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"'
 251 )'
 252         say >&3 "checking prerequisite: $1"
 253         say >&3 "$script"
 254         test_eval_ "$script"
 255         eval_ret=$?
 256         rm -rf "$TRASH_DIRECTORY/prereq-test-dir"
 257         if test "$eval_ret" = 0; then
 258                 say >&3 "prerequisite $1 ok"
 259         else
 260                 say >&3 "prerequisite $1 not satisfied"
 261         fi
 262         return $eval_ret
 263 }
 264
 265 test_have_prereq () {
 266         # prerequisites can be concatenated with ','
 267         save_IFS=$IFS
 268         IFS=,
 269         set -- $*
 270         IFS=$save_IFS
 271
 272         total_prereq=0
 273         ok_prereq=0
 274         missing_prereq=
 275
 276         for prerequisite
 277         do
 278                 case "$prerequisite" in
 279                 !*)
 280                         negative_prereq=t
 281                         prerequisite=${prerequisite#!}
 282                         ;;
 283                 *)
 284                         negative_prereq=
 285                 esac
 286
 287                 case " $lazily_tested_prereq " in
 288                 *" $prerequisite "*)
 289                         ;;
 290                 *)
 291                         case " $lazily_testable_prereq " in
 292                         *" $prerequisite "*)
 293                                 eval "script=\$test_prereq_lazily_$prerequisite" &&
 294                                 if test_run_lazy_prereq_ "$prerequisite" "$script"
 295                                 then
 296                                         test_set_prereq $prerequisite
 297                                 fi
 298                                 lazily_tested_prereq="$lazily_tested_prereq$prerequisite "
 299                         esac
 300                         ;;
 301                 esac
 302
 303                 total_prereq=$(($total_prereq + 1))
 304                 case "$satisfied_prereq" in
 305                 *" $prerequisite "*)
 306                         satisfied_this_prereq=t
 307                         ;;
 308                 *)
 309                         satisfied_this_prereq=
 310                 esac
 311
 312                 case "$satisfied_this_prereq,$negative_prereq" in
 313                 t,|,t)
 314                         ok_prereq=$(($ok_prereq + 1))
 315                         ;;
 316                 *)
 317                         # Keep a list of missing prerequisites; restore
 318                         # the negative marker if necessary.
 319                         prerequisite=${negative_prereq:+!}$prerequisite
 320                         if test -z "$missing_prereq"
 321                         then
 322                                 missing_prereq=$prerequisite
 323                         else
 324                                 missing_prereq="$prerequisite,$missing_prereq"
 325                         fi
 326                 esac
 327         done
 328
 329         test $total_prereq = $ok_prereq
 330 }
 331
 332 test_declared_prereq () {
 333         case ",$test_prereq," in
 334         *,$1,*)
 335                 return 0
 336                 ;;
 337         esac
 338         return 1
 339 }
 340
 341 test_expect_failure () {
 342         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 343         test "$#" = 2 ||
 344         error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
 345         export test_prereq
 346         if ! test_skip "$@"
 347         then
 348                 say >&3 "checking known breakage: $2"
 349                 if test_run_ "$2" expecting_failure
 350                 then
 351                         test_known_broken_ok_ "$1"
 352                 else
 353                         test_known_broken_failure_ "$1"
 354                 fi
 355         fi
 356         echo >&3 ""
 357 }
 358
 359 test_expect_success () {
 360         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 361         test "$#" = 2 ||
 362         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 363         export test_prereq
 364         if ! test_skip "$@"
 365         then
 366                 say >&3 "expecting success: $2"
 367                 if test_run_ "$2"
 368                 then
 369                         test_ok_ "$1"
 370                 else
 371                         test_failure_ "$@"
 372                 fi
 373         fi
 374         echo >&3 ""
 375 }
 376
 377 # test_external runs external test scripts that provide continuous
 378 # test output about their progress, and succeeds/fails on
 379 # zero/non-zero exit code.  It outputs the test output on stdout even
 380 # in non-verbose mode, and announces the external script with "# run
 381 # <n>: ..." before running it.  When providing relative paths, keep in
 382 # mind that all scripts run in "trash directory".
 383 # Usage: test_external description command arguments...
 384 # Example: test_external 'Perl API' perl ../path/to/test.pl
 385 test_external () {
 386         test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
 387         test "$#" = 3 ||
 388         error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 389         descr="$1"
 390         shift
 391         export test_prereq
 392         if ! test_skip "$descr" "$@"
 393         then
 394                 # Announce the script to reduce confusion about the
 395                 # test output that follows.
 396                 say_color "" "# run $test_count: $descr ($*)"
 397                 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
 398                 # to be able to use them in script
 399                 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
 400                 # Run command; redirect its stderr to &4 as in
 401                 # test_run_, but keep its stdout on our stdout even in
 402                 # non-verbose mode.
 403                 "$@" 2>&4
 404                 if [ "$?" = 0 ]
 405                 then
 406                         if test $test_external_has_tap -eq 0; then
 407                                 test_ok_ "$descr"
 408                         else
 409                                 say_color "" "# test_external test $descr was ok"
 410                                 test_success=$(($test_success + 1))
 411                         fi
 412                 else
 413                         if test $test_external_has_tap -eq 0; then
 414                                 test_failure_ "$descr" "$@"
 415                         else
 416                                 say_color error "# test_external test $descr failed: $@"
 417                                 test_failure=$(($test_failure + 1))
 418                         fi
 419                 fi
 420         fi
 421 }
 422
 423 # Like test_external, but in addition tests that the command generated
 424 # no output on stderr.
 425 test_external_without_stderr () {
 426         # The temporary file has no (and must have no) security
 427         # implications.
 428         tmp=${TMPDIR:-/tmp}
 429         stderr="$tmp/git-external-stderr.$$.tmp"
 430         test_external "$@" 4> "$stderr"
 431         [ -f "$stderr" ] || error "Internal error: $stderr disappeared."
 432         descr="no stderr: $1"
 433         shift
 434         say >&3 "# expecting no stderr from previous command"
 435         if [ ! -s "$stderr" ]; then
 436                 rm "$stderr"
 437
 438                 if test $test_external_has_tap -eq 0; then
 439                         test_ok_ "$descr"
 440                 else
 441                         say_color "" "# test_external_without_stderr test $descr was ok"
 442                         test_success=$(($test_success + 1))
 443                 fi
 444         else
 445                 if [ "$verbose" = t ]; then
 446                         output=`echo; echo "# Stderr is:"; cat "$stderr"`
 447                 else
 448                         output=
 449                 fi
 450                 # rm first in case test_failure exits.
 451                 rm "$stderr"
 452                 if test $test_external_has_tap -eq 0; then
 453                         test_failure_ "$descr" "$@" "$output"
 454                 else
 455                         say_color error "# test_external_without_stderr test $descr failed: $@: $output"
 456                         test_failure=$(($test_failure + 1))
 457                 fi
 458         fi
 459 }
 460
 461 # debugging-friendly alternatives to "test [-f|-d|-e]"
 462 # The commands test the existence or non-existence of $1. $2 can be
 463 # given to provide a more precise diagnosis.
 464 test_path_is_file () {
 465         if ! [ -f "$1" ]
 466         then
 467                 echo "File $1 doesn't exist. $*"
 468                 false
 469         fi
 470 }
 471
 472 test_path_is_dir () {
 473         if ! [ -d "$1" ]
 474         then
 475                 echo "Directory $1 doesn't exist. $*"
 476                 false
 477         fi
 478 }
 479
 480 test_path_is_missing () {
 481         if [ -e "$1" ]
 482         then
 483                 echo "Path exists:"
 484                 ls -ld "$1"
 485                 if [ $# -ge 1 ]; then
 486                         echo "$*"
 487                 fi
 488                 false
 489         fi
 490 }
 491
 492 # test_line_count checks that a file has the number of lines it
 493 # ought to. For example:
 494 #
 495 #       test_expect_success 'produce exactly one line of output' '
 496 #               do something >output &&
 497 #               test_line_count = 1 output
 498 #       '
 499 #
 500 # is like "test $(wc -l <output) = 1" except that it passes the
 501 # output through when the number of lines is wrong.
 502
 503 test_line_count () {
 504         if test $# != 3
 505         then
 506                 error "bug in the test script: not 3 parameters to test_line_count"
 507         elif ! test $(wc -l <"$3") "$1" "$2"
 508         then
 509                 echo "test_line_count: line count for $3 !$1 $2"
 510                 cat "$3"
 511                 return 1
 512         fi
 513 }
 514
 515 # This is not among top-level (test_expect_success | test_expect_failure)
 516 # but is a prefix that can be used in the test script, like:
 517 #
 518 #       test_expect_success 'complain and die' '
 519 #           do something &&
 520 #           do something else &&
 521 #           test_must_fail git checkout ../outerspace
 522 #       '
 523 #
 524 # Writing this as "! git checkout ../outerspace" is wrong, because
 525 # the failure could be due to a segv.  We want a controlled failure.
 526
 527 test_must_fail () {
 528         "$@"
 529         exit_code=$?
 530         if test $exit_code = 0; then
 531                 echo >&2 "test_must_fail: command succeeded: $*"
 532                 return 1
 533         elif test $exit_code -gt 129 -a $exit_code -le 192; then
 534                 echo >&2 "test_must_fail: died by signal: $*"
 535                 return 1
 536         elif test $exit_code = 127; then
 537                 echo >&2 "test_must_fail: command not found: $*"
 538                 return 1
 539         fi
 540         return 0
 541 }
 542
 543 # Similar to test_must_fail, but tolerates success, too.  This is
 544 # meant to be used in contexts like:
 545 #
 546 #       test_expect_success 'some command works without configuration' '
 547 #               test_might_fail git config --unset all.configuration &&
 548 #               do something
 549 #       '
 550 #
 551 # Writing "git config --unset all.configuration || :" would be wrong,
 552 # because we want to notice if it fails due to segv.
 553
 554 test_might_fail () {
 555         "$@"
 556         exit_code=$?
 557         if test $exit_code -gt 129 -a $exit_code -le 192; then
 558                 echo >&2 "test_might_fail: died by signal: $*"
 559                 return 1
 560         elif test $exit_code = 127; then
 561                 echo >&2 "test_might_fail: command not found: $*"
 562                 return 1
 563         fi
 564         return 0
 565 }
 566
 567 # Similar to test_must_fail and test_might_fail, but check that a
 568 # given command exited with a given exit code. Meant to be used as:
 569 #
 570 #       test_expect_success 'Merge with d/f conflicts' '
 571 #               test_expect_code 1 git merge "merge msg" B master
 572 #       '
 573
 574 test_expect_code () {
 575         want_code=$1
 576         shift
 577         "$@"
 578         exit_code=$?
 579         if test $exit_code = $want_code
 580         then
 581                 return 0
 582         fi
 583
 584         echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
 585         return 1
 586 }
 587
 588 # test_cmp is a helper function to compare actual and expected output.
 589 # You can use it like:
 590 #
 591 #       test_expect_success 'foo works' '
 592 #               echo expected >expected &&
 593 #               foo >actual &&
 594 #               test_cmp expected actual
 595 #       '
 596 #
 597 # This could be written as either "cmp" or "diff -u", but:
 598 # - cmp's output is not nearly as easy to read as diff -u
 599 # - not all diff versions understand "-u"
 600
 601 test_cmp() {
 602         $GIT_TEST_CMP "$@"
 603 }
 604
 605 # Tests that its two parameters refer to the same revision
 606 test_cmp_rev () {
 607         git rev-parse --verify "$1" >expect.rev &&
 608         git rev-parse --verify "$2" >actual.rev &&
 609         test_cmp expect.rev actual.rev
 610 }
 611
 612 # Print a sequence of numbers or letters in increasing order.  This is
 613 # similar to GNU seq(1), but the latter might not be available
 614 # everywhere (and does not do letters).  It may be used like:
 615 #
 616 #       for i in `test_seq 100`; do
 617 #               for j in `test_seq 10 20`; do
 618 #                       for k in `test_seq a z`; do
 619 #                               echo $i-$j-$k
 620 #                       done
 621 #               done
 622 #       done
 623
 624 test_seq () {
 625         case $# in
 626         1)      set 1 "$@" ;;
 627         2)      ;;
 628         *)      error "bug in the test script: not 1 or 2 parameters to test_seq" ;;
 629         esac
 630         "$PERL_PATH" -le 'print for $ARGV[0]..$ARGV[1]' -- "$@"
 631 }
 632
 633 # This function can be used to schedule some commands to be run
 634 # unconditionally at the end of the test to restore sanity:
 635 #
 636 #       test_expect_success 'test core.capslock' '
 637 #               git config core.capslock true &&
 638 #               test_when_finished "git config --unset core.capslock" &&
 639 #               hello world
 640 #       '
 641 #
 642 # That would be roughly equivalent to
 643 #
 644 #       test_expect_success 'test core.capslock' '
 645 #               git config core.capslock true &&
 646 #               hello world
 647 #               git config --unset core.capslock
 648 #       '
 649 #
 650 # except that the greeting and config --unset must both succeed for
 651 # the test to pass.
 652 #
 653 # Note that under --immediate mode, no clean-up is done to help diagnose
 654 # what went wrong.
 655
 656 test_when_finished () {
 657         test_cleanup="{ $*
 658                 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 659 }
 660
 661 # Most tests can use the created repository, but some may need to create more.
 662 # Usage: test_create_repo <directory>
 663 test_create_repo () {
 664         test "$#" = 1 ||
 665         error "bug in the test script: not 1 parameter to test-create-repo"
 666         repo="$1"
 667         mkdir -p "$repo"
 668         (
 669                 cd "$repo" || error "Cannot setup test environment"
 670                 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
 671                 error "cannot run git init -- have you built things yet?"
 672                 mv .git/hooks .git/hooks-disabled
 673         ) || exit
 674 }