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         if test "z$1" = "z--notick"
 148         then
 149                 notick=yes
 150                 shift
 151         fi &&
 152         file=${2:-"$1.t"} &&
 153         echo "${3-$1}" > "$file" &&
 154         git add "$file" &&
 155         if test -z "$notick"
 156         then
 157                 test_tick
 158         fi &&
 159         git commit -m "$1" &&
 160         git tag "$1"
 161 }
 162
 163 # Call test_merge with the arguments "<message> <commit>", where <commit>
 164 # can be a tag pointing to the commit-to-merge.
 165
 166 test_merge () {
 167         test_tick &&
 168         git merge -m "$1" "$2" &&
 169         git tag "$1"
 170 }
 171
 172 # This function helps systems where core.filemode=false is set.
 173 # Use it instead of plain 'chmod +x' to set or unset the executable bit
 174 # of a file in the working directory and add it to the index.
 175
 176 test_chmod () {
 177         chmod "$@" &&
 178         git update-index --add "--chmod=$@"
 179 }
 180
 181 # Unset a configuration variable, but don't fail if it doesn't exist.
 182 test_unconfig () {
 183         git config --unset-all "$@"
 184         config_status=$?
 185         case "$config_status" in
 186         5) # ok, nothing to unset
 187                 config_status=0
 188                 ;;
 189         esac
 190         return $config_status
 191 }
 192
 193 # Set git config, automatically unsetting it after the test is over.
 194 test_config () {
 195         test_when_finished "test_unconfig '$1'" &&
 196         git config "$@"
 197 }
 198
 199 test_config_global () {
 200         test_when_finished "test_unconfig --global '$1'" &&
 201         git config --global "$@"
 202 }
 203
 204 write_script () {
 205         {
 206                 echo "#!${2-"$SHELL_PATH"}" &&
 207                 cat
 208         } >"$1" &&
 209         chmod +x "$1"
 210 }
 211
 212 # Use test_set_prereq to tell that a particular prerequisite is available.
 213 # The prerequisite can later be checked for in two ways:
 214 #
 215 # - Explicitly using test_have_prereq.
 216 #
 217 # - Implicitly by specifying the prerequisite tag in the calls to
 218 #   test_expect_{success,failure,code}.
 219 #
 220 # The single parameter is the prerequisite tag (a simple word, in all
 221 # capital letters by convention).
 222
 223 test_set_prereq () {
 224         satisfied_prereq="$satisfied_prereq$1 "
 225 }
 226 satisfied_prereq=" "
 227 lazily_testable_prereq= lazily_tested_prereq=
 228
 229 # Usage: test_lazy_prereq PREREQ 'script'
 230 test_lazy_prereq () {
 231         lazily_testable_prereq="$lazily_testable_prereq$1 "
 232         eval test_prereq_lazily_$1=\$2
 233 }
 234
 235 test_run_lazy_prereq_ () {
 236         script='
 237 mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" &&
 238 (
 239         cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"'
 240 )'
 241         say >&3 "checking prerequisite: $1"
 242         say >&3 "$script"
 243         test_eval_ "$script"
 244         eval_ret=$?
 245         rm -rf "$TRASH_DIRECTORY/prereq-test-dir"
 246         if test "$eval_ret" = 0; then
 247                 say >&3 "prerequisite $1 ok"
 248         else
 249                 say >&3 "prerequisite $1 not satisfied"
 250         fi
 251         return $eval_ret
 252 }
 253
 254 test_have_prereq () {
 255         # prerequisites can be concatenated with ','
 256         save_IFS=$IFS
 257         IFS=,
 258         set -- $*
 259         IFS=$save_IFS
 260
 261         total_prereq=0
 262         ok_prereq=0
 263         missing_prereq=
 264
 265         for prerequisite
 266         do
 267                 case " $lazily_tested_prereq " in
 268                 *" $prerequisite "*)
 269                         ;;
 270                 *)
 271                         case " $lazily_testable_prereq " in
 272                         *" $prerequisite "*)
 273                                 eval "script=\$test_prereq_lazily_$prerequisite" &&
 274                                 if test_run_lazy_prereq_ "$prerequisite" "$script"
 275                                 then
 276                                         test_set_prereq $prerequisite
 277                                 fi
 278                                 lazily_tested_prereq="$lazily_tested_prereq$prerequisite "
 279                         esac
 280                         ;;
 281                 esac
 282
 283                 total_prereq=$(($total_prereq + 1))
 284                 case "$satisfied_prereq" in
 285                 *" $prerequisite "*)
 286                         ok_prereq=$(($ok_prereq + 1))
 287                         ;;
 288                 *)
 289                         # Keep a list of missing prerequisites
 290                         if test -z "$missing_prereq"
 291                         then
 292                                 missing_prereq=$prerequisite
 293                         else
 294                                 missing_prereq="$prerequisite,$missing_prereq"
 295                         fi
 296                 esac
 297         done
 298
 299         test $total_prereq = $ok_prereq
 300 }
 301
 302 test_declared_prereq () {
 303         case ",$test_prereq," in
 304         *,$1,*)
 305                 return 0
 306                 ;;
 307         esac
 308         return 1
 309 }
 310
 311 test_expect_failure () {
 312         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 313         test "$#" = 2 ||
 314         error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
 315         export test_prereq
 316         if ! test_skip "$@"
 317         then
 318                 say >&3 "checking known breakage: $2"
 319                 if test_run_ "$2" expecting_failure
 320                 then
 321                         test_known_broken_ok_ "$1"
 322                 else
 323                         test_known_broken_failure_ "$1"
 324                 fi
 325         fi
 326         echo >&3 ""
 327 }
 328
 329 test_expect_success () {
 330         test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
 331         test "$#" = 2 ||
 332         error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 333         export test_prereq
 334         if ! test_skip "$@"
 335         then
 336                 say >&3 "expecting success: $2"
 337                 if test_run_ "$2"
 338                 then
 339                         test_ok_ "$1"
 340                 else
 341                         test_failure_ "$@"
 342                 fi
 343         fi
 344         echo >&3 ""
 345 }
 346
 347 # test_external runs external test scripts that provide continuous
 348 # test output about their progress, and succeeds/fails on
 349 # zero/non-zero exit code.  It outputs the test output on stdout even
 350 # in non-verbose mode, and announces the external script with "# run
 351 # <n>: ..." before running it.  When providing relative paths, keep in
 352 # mind that all scripts run in "trash directory".
 353 # Usage: test_external description command arguments...
 354 # Example: test_external 'Perl API' perl ../path/to/test.pl
 355 test_external () {
 356         test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
 357         test "$#" = 3 ||
 358         error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
 359         descr="$1"
 360         shift
 361         export test_prereq
 362         if ! test_skip "$descr" "$@"
 363         then
 364                 # Announce the script to reduce confusion about the
 365                 # test output that follows.
 366                 say_color "" "# run $test_count: $descr ($*)"
 367                 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
 368                 # to be able to use them in script
 369                 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
 370                 # Run command; redirect its stderr to &4 as in
 371                 # test_run_, but keep its stdout on our stdout even in
 372                 # non-verbose mode.
 373                 "$@" 2>&4
 374                 if [ "$?" = 0 ]
 375                 then
 376                         if test $test_external_has_tap -eq 0; then
 377                                 test_ok_ "$descr"
 378                         else
 379                                 say_color "" "# test_external test $descr was ok"
 380                                 test_success=$(($test_success + 1))
 381                         fi
 382                 else
 383                         if test $test_external_has_tap -eq 0; then
 384                                 test_failure_ "$descr" "$@"
 385                         else
 386                                 say_color error "# test_external test $descr failed: $@"
 387                                 test_failure=$(($test_failure + 1))
 388                         fi
 389                 fi
 390         fi
 391 }
 392
 393 # Like test_external, but in addition tests that the command generated
 394 # no output on stderr.
 395 test_external_without_stderr () {
 396         # The temporary file has no (and must have no) security
 397         # implications.
 398         tmp=${TMPDIR:-/tmp}
 399         stderr="$tmp/git-external-stderr.$$.tmp"
 400         test_external "$@" 4> "$stderr"
 401         [ -f "$stderr" ] || error "Internal error: $stderr disappeared."
 402         descr="no stderr: $1"
 403         shift
 404         say >&3 "# expecting no stderr from previous command"
 405         if [ ! -s "$stderr" ]; then
 406                 rm "$stderr"
 407
 408                 if test $test_external_has_tap -eq 0; then
 409                         test_ok_ "$descr"
 410                 else
 411                         say_color "" "# test_external_without_stderr test $descr was ok"
 412                         test_success=$(($test_success + 1))
 413                 fi
 414         else
 415                 if [ "$verbose" = t ]; then
 416                         output=`echo; echo "# Stderr is:"; cat "$stderr"`
 417                 else
 418                         output=
 419                 fi
 420                 # rm first in case test_failure exits.
 421                 rm "$stderr"
 422                 if test $test_external_has_tap -eq 0; then
 423                         test_failure_ "$descr" "$@" "$output"
 424                 else
 425                         say_color error "# test_external_without_stderr test $descr failed: $@: $output"
 426                         test_failure=$(($test_failure + 1))
 427                 fi
 428         fi
 429 }
 430
 431 # debugging-friendly alternatives to "test [-f|-d|-e]"
 432 # The commands test the existence or non-existence of $1. $2 can be
 433 # given to provide a more precise diagnosis.
 434 test_path_is_file () {
 435         if ! [ -f "$1" ]
 436         then
 437                 echo "File $1 doesn't exist. $*"
 438                 false
 439         fi
 440 }
 441
 442 test_path_is_dir () {
 443         if ! [ -d "$1" ]
 444         then
 445                 echo "Directory $1 doesn't exist. $*"
 446                 false
 447         fi
 448 }
 449
 450 test_path_is_missing () {
 451         if [ -e "$1" ]
 452         then
 453                 echo "Path exists:"
 454                 ls -ld "$1"
 455                 if [ $# -ge 1 ]; then
 456                         echo "$*"
 457                 fi
 458                 false
 459         fi
 460 }
 461
 462 # test_line_count checks that a file has the number of lines it
 463 # ought to. For example:
 464 #
 465 #       test_expect_success 'produce exactly one line of output' '
 466 #               do something >output &&
 467 #               test_line_count = 1 output
 468 #       '
 469 #
 470 # is like "test $(wc -l <output) = 1" except that it passes the
 471 # output through when the number of lines is wrong.
 472
 473 test_line_count () {
 474         if test $# != 3
 475         then
 476                 error "bug in the test script: not 3 parameters to test_line_count"
 477         elif ! test $(wc -l <"$3") "$1" "$2"
 478         then
 479                 echo "test_line_count: line count for $3 !$1 $2"
 480                 cat "$3"
 481                 return 1
 482         fi
 483 }
 484
 485 # This is not among top-level (test_expect_success | test_expect_failure)
 486 # but is a prefix that can be used in the test script, like:
 487 #
 488 #       test_expect_success 'complain and die' '
 489 #           do something &&
 490 #           do something else &&
 491 #           test_must_fail git checkout ../outerspace
 492 #       '
 493 #
 494 # Writing this as "! git checkout ../outerspace" is wrong, because
 495 # the failure could be due to a segv.  We want a controlled failure.
 496
 497 test_must_fail () {
 498         "$@"
 499         exit_code=$?
 500         if test $exit_code = 0; then
 501                 echo >&2 "test_must_fail: command succeeded: $*"
 502                 return 1
 503         elif test $exit_code -gt 129 -a $exit_code -le 192; then
 504                 echo >&2 "test_must_fail: died by signal: $*"
 505                 return 1
 506         elif test $exit_code = 127; then
 507                 echo >&2 "test_must_fail: command not found: $*"
 508                 return 1
 509         fi
 510         return 0
 511 }
 512
 513 # Similar to test_must_fail, but tolerates success, too.  This is
 514 # meant to be used in contexts like:
 515 #
 516 #       test_expect_success 'some command works without configuration' '
 517 #               test_might_fail git config --unset all.configuration &&
 518 #               do something
 519 #       '
 520 #
 521 # Writing "git config --unset all.configuration || :" would be wrong,
 522 # because we want to notice if it fails due to segv.
 523
 524 test_might_fail () {
 525         "$@"
 526         exit_code=$?
 527         if test $exit_code -gt 129 -a $exit_code -le 192; then
 528                 echo >&2 "test_might_fail: died by signal: $*"
 529                 return 1
 530         elif test $exit_code = 127; then
 531                 echo >&2 "test_might_fail: command not found: $*"
 532                 return 1
 533         fi
 534         return 0
 535 }
 536
 537 # Similar to test_must_fail and test_might_fail, but check that a
 538 # given command exited with a given exit code. Meant to be used as:
 539 #
 540 #       test_expect_success 'Merge with d/f conflicts' '
 541 #               test_expect_code 1 git merge "merge msg" B master
 542 #       '
 543
 544 test_expect_code () {
 545         want_code=$1
 546         shift
 547         "$@"
 548         exit_code=$?
 549         if test $exit_code = $want_code
 550         then
 551                 return 0
 552         fi
 553
 554         echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
 555         return 1
 556 }
 557
 558 # test_cmp is a helper function to compare actual and expected output.
 559 # You can use it like:
 560 #
 561 #       test_expect_success 'foo works' '
 562 #               echo expected >expected &&
 563 #               foo >actual &&
 564 #               test_cmp expected actual
 565 #       '
 566 #
 567 # This could be written as either "cmp" or "diff -u", but:
 568 # - cmp's output is not nearly as easy to read as diff -u
 569 # - not all diff versions understand "-u"
 570
 571 test_cmp() {
 572         $GIT_TEST_CMP "$@"
 573 }
 574
 575 # Print a sequence of numbers or letters in increasing order.  This is
 576 # similar to GNU seq(1), but the latter might not be available
 577 # everywhere (and does not do letters).  It may be used like:
 578 #
 579 #       for i in `test_seq 100`; do
 580 #               for j in `test_seq 10 20`; do
 581 #                       for k in `test_seq a z`; do
 582 #                               echo $i-$j-$k
 583 #                       done
 584 #               done
 585 #       done
 586
 587 test_seq () {
 588         case $# in
 589         1)      set 1 "$@" ;;
 590         2)      ;;
 591         *)      error "bug in the test script: not 1 or 2 parameters to test_seq" ;;
 592         esac
 593         "$PERL_PATH" -le 'print for $ARGV[0]..$ARGV[1]' -- "$@"
 594 }
 595
 596 # This function can be used to schedule some commands to be run
 597 # unconditionally at the end of the test to restore sanity:
 598 #
 599 #       test_expect_success 'test core.capslock' '
 600 #               git config core.capslock true &&
 601 #               test_when_finished "git config --unset core.capslock" &&
 602 #               hello world
 603 #       '
 604 #
 605 # That would be roughly equivalent to
 606 #
 607 #       test_expect_success 'test core.capslock' '
 608 #               git config core.capslock true &&
 609 #               hello world
 610 #               git config --unset core.capslock
 611 #       '
 612 #
 613 # except that the greeting and config --unset must both succeed for
 614 # the test to pass.
 615 #
 616 # Note that under --immediate mode, no clean-up is done to help diagnose
 617 # what went wrong.
 618
 619 test_when_finished () {
 620         test_cleanup="{ $*
 621                 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 622 }
 623
 624 # Most tests can use the created repository, but some may need to create more.
 625 # Usage: test_create_repo <directory>
 626 test_create_repo () {
 627         test "$#" = 1 ||
 628         error "bug in the test script: not 1 parameter to test-create-repo"
 629         repo="$1"
 630         mkdir -p "$repo"
 631         (
 632                 cd "$repo" || error "Cannot setup test environment"
 633                 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
 634                 error "cannot run git init -- have you built things yet?"
 635                 mv .git/hooks .git/hooks-disabled
 636         ) || exit
 637 }