Andrew's git / gitweb.git / t/test-lib-functions.sh
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t / test-lib-functions.shon commit t0070: test that git_mkstemps correctly checks return value of open() (253b27f)
   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.
  27test_set_editor () {
  28        FAKE_EDITOR="$1"
  29        export FAKE_EDITOR
  30        EDITOR='"$FAKE_EDITOR"'
  31        export EDITOR
  32}
  33
  34test_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($0) - RSTART - RLENGTH + 1);
  72                        }
  73                        print
  74                }
  75        '
  76}
  77
  78nul_to_q () {
  79        "$PERL_PATH" -pe 'y/\000/Q/'
  80}
  81
  82q_to_nul () {
  83        "$PERL_PATH" -pe 'y/Q/\000/'
  84}
  85
  86q_to_cr () {
  87        tr Q '\015'
  88}
  89
  90q_to_tab () {
  91        tr Q '\011'
  92}
  93
  94append_cr () {
  95        sed -e 's/$/Q/' | tr Q '\015'
  96}
  97
  98remove_cr () {
  99        tr '\015' Q | sed -e 's/Q$//'
 100}
 101
 102# In some bourne shell implementations, the "unset" builtin returns
 103# nonzero status when a variable to be unset was not set in the first
 104# place.
 105#
 106# Use sane_unset when that should not be considered an error.
 107
 108sane_unset () {
 109        unset "$@"
 110        return 0
 111}
 112
 113test_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="$test_tick -0700"
 122        export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
 123}
 124
 125# Stop execution and start a shell. This is useful for debugging tests and
 126# only makes sense together with "-v".
 127#
 128# Be sure to remove all invocations of this command before submitting.
 129
 130test_pause () {
 131        if test "$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
 145test_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
 177test_merge () {
 178        test_tick &&
 179        git merge -m "$1" "$2" &&
 180        git tag "$1"
 181}
 182
 183# This function helps systems where core.filemode=false is set.
 184# Use it instead of plain 'chmod +x' to set or unset the executable bit
 185# of a file in the working directory and add it to the index.
 186
 187test_chmod () {
 188        chmod "$@" &&
 189        git update-index --add "--chmod=$@"
 190}
 191
 192# Unset a configuration variable, but don't fail if it doesn't exist.
 193test_unconfig () {
 194        git config --unset-all "$@"
 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.
 205test_config () {
 206        test_when_finished "test_unconfig '$1'" &&
 207        git config "$@"
 208}
 209
 210test_config_global () {
 211        test_when_finished "test_unconfig --global '$1'" &&
 212        git config --global "$@"
 213}
 214
 215write_script () {
 216        {
 217                echo "#!${2-"$SHELL_PATH"}" &&
 218                cat
 219        } >"$1" &&
 220        chmod +x "$1"
 221}
 222
 223# Use test_set_prereq to tell that a particular prerequisite is available.
 224# The prerequisite can later be checked for in two ways:
 225#
 226# - Explicitly using test_have_prereq.
 227#
 228# - Implicitly by specifying the prerequisite tag in the calls to
 229#   test_expect_{success,failure,code}.
 230#
 231# The single parameter is the prerequisite tag (a simple word, in all
 232# capital letters by convention).
 233
 234test_set_prereq () {
 235        satisfied_prereq="$satisfied_prereq$1 "
 236}
 237satisfied_prereq=" "
 238lazily_testable_prereq= lazily_tested_prereq=
 239
 240# Usage: test_lazy_prereq PREREQ 'script'
 241test_lazy_prereq () {
 242        lazily_testable_prereq="$lazily_testable_prereq$1 "
 243        eval test_prereq_lazily_$1=\$2
 244}
 245
 246test_run_lazy_prereq_ () {
 247        script='
 248mkdir -p "$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 $eval_ret
 263}
 264
 265test_have_prereq () {
 266        # prerequisites can be concatenated with ','
 267        save_IFS=$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 = $ok_prereq
 330}
 331
 332test_declared_prereq () {
 333        case ",$test_prereq," in
 334        *,$1,*)
 335                return 0
 336                ;;
 337        esac
 338        return 1
 339}
 340
 341test_expect_failure () {
 342        test "$#" = 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_ "$1"
 354                fi
 355        fi
 356        echo >&3 ""
 357}
 358
 359test_expect_success () {
 360        test "$#" = 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
 385test_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: $@"
 417                                test_failure=$(($test_failure + 1))
 418                        fi
 419                fi
 420        fi
 421}
 422
 423# Like test_external, but in addition tests that the command generated
 424# no output on stderr.
 425test_external_without_stderr () {
 426        # The temporary file has no (and must have no) security
 427        # implications.
 428        tmp=${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.
 464test_path_is_file () {
 465        if ! [ -f "$1" ]
 466        then
 467                echo "File $1 doesn't exist. $*"
 468                false
 469        fi
 470}
 471
 472test_path_is_dir () {
 473        if ! [ -d "$1" ]
 474        then
 475                echo "Directory $1 doesn't exist. $*"
 476                false
 477        fi
 478}
 479
 480test_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
 503test_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 "$3"
 511                return 1
 512        fi
 513}
 514
 515# This is not among top-level (test_expect_success | test_expect_failure)
 516# but is a prefix that can be used in the test script, like:
 517#
 518#       test_expect_success 'complain and die' '
 519#           do something &&
 520#           do something else &&
 521#           test_must_fail git checkout ../outerspace
 522#       '
 523#
 524# Writing this as "! git checkout ../outerspace" is wrong, because
 525# the failure could be due to a segv.  We want a controlled failure.
 526
 527test_must_fail () {
 528        "$@"
 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: $*"
 538                return 1
 539        fi
 540        return 0
 541}
 542
 543# Similar to test_must_fail, but tolerates success, too.  This is
 544# meant to be used in contexts like:
 545#
 546#       test_expect_success 'some command works without configuration' '
 547#               test_might_fail git config --unset all.configuration &&
 548#               do something
 549#       '
 550#
 551# Writing "git config --unset all.configuration || :" would be wrong,
 552# because we want to notice if it fails due to segv.
 553
 554test_might_fail () {
 555        "$@"
 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
 574test_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
 601test_cmp() {
 602        $GIT_TEST_CMP "$@"
 603}
 604
 605# Tests that its two parameters refer to the same revision
 606test_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
 624test_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
 656test_when_finished () {
 657        test_cleanup="{ $*
 658                } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 659}
 660
 661# Most tests can use the created repository, but some may need to create more.
 662# Usage: test_create_repo <directory>
 663test_create_repo () {
 664        test "$#" = 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}