Andrew's git / gitweb.git / t/test-lib-functions.sh
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t / test-lib-functions.shon commit Merge branch 'jc/blame-follows-renames' into maint (63c0c2c)
   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        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
 166test_merge () {
 167        test_tick &&
 168        git merge -m "$1" "$2" &&
 169        git tag "$1"
 170}
 171
 172# This function helps systems where core.filemode=false is set.
 173# Use it instead of plain 'chmod +x' to set or unset the executable bit
 174# of a file in the working directory and add it to the index.
 175
 176test_chmod () {
 177        chmod "$@" &&
 178        git update-index --add "--chmod=$@"
 179}
 180
 181# Unset a configuration variable, but don't fail if it doesn't exist.
 182test_unconfig () {
 183        git config --unset-all "$@"
 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.
 194test_config () {
 195        test_when_finished "test_unconfig '$1'" &&
 196        git config "$@"
 197}
 198
 199test_config_global () {
 200        test_when_finished "test_unconfig --global '$1'" &&
 201        git config --global "$@"
 202}
 203
 204write_script () {
 205        {
 206                echo "#!${2-"$SHELL_PATH"}" &&
 207                cat
 208        } >"$1" &&
 209        chmod +x "$1"
 210}
 211
 212# Use test_set_prereq to tell that a particular prerequisite is available.
 213# The prerequisite can later be checked for in two ways:
 214#
 215# - Explicitly using test_have_prereq.
 216#
 217# - Implicitly by specifying the prerequisite tag in the calls to
 218#   test_expect_{success,failure,code}.
 219#
 220# The single parameter is the prerequisite tag (a simple word, in all
 221# capital letters by convention).
 222
 223test_set_prereq () {
 224        satisfied_prereq="$satisfied_prereq$1 "
 225}
 226satisfied_prereq=" "
 227lazily_testable_prereq= lazily_tested_prereq=
 228
 229# Usage: test_lazy_prereq PREREQ 'script'
 230test_lazy_prereq () {
 231        lazily_testable_prereq="$lazily_testable_prereq$1 "
 232        eval test_prereq_lazily_$1=\$2
 233}
 234
 235test_run_lazy_prereq_ () {
 236        script='
 237mkdir -p "$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 $eval_ret
 252}
 253
 254test_have_prereq () {
 255        # prerequisites can be concatenated with ','
 256        save_IFS=$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 = $ok_prereq
 300}
 301
 302test_declared_prereq () {
 303        case ",$test_prereq," in
 304        *,$1,*)
 305                return 0
 306                ;;
 307        esac
 308        return 1
 309}
 310
 311test_expect_failure () {
 312        test "$#" = 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_ "$1"
 324                fi
 325        fi
 326        echo >&3 ""
 327}
 328
 329test_expect_success () {
 330        test "$#" = 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
 355test_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: $@"
 387                                test_failure=$(($test_failure + 1))
 388                        fi
 389                fi
 390        fi
 391}
 392
 393# Like test_external, but in addition tests that the command generated
 394# no output on stderr.
 395test_external_without_stderr () {
 396        # The temporary file has no (and must have no) security
 397        # implications.
 398        tmp=${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.
 434test_path_is_file () {
 435        if ! [ -f "$1" ]
 436        then
 437                echo "File $1 doesn't exist. $*"
 438                false
 439        fi
 440}
 441
 442test_path_is_dir () {
 443        if ! [ -d "$1" ]
 444        then
 445                echo "Directory $1 doesn't exist. $*"
 446                false
 447        fi
 448}
 449
 450test_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
 473test_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 "$3"
 481                return 1
 482        fi
 483}
 484
 485# This is not among top-level (test_expect_success | test_expect_failure)
 486# but is a prefix that can be used in the test script, like:
 487#
 488#       test_expect_success 'complain and die' '
 489#           do something &&
 490#           do something else &&
 491#           test_must_fail git checkout ../outerspace
 492#       '
 493#
 494# Writing this as "! git checkout ../outerspace" is wrong, because
 495# the failure could be due to a segv.  We want a controlled failure.
 496
 497test_must_fail () {
 498        "$@"
 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: $*"
 508                return 1
 509        fi
 510        return 0
 511}
 512
 513# Similar to test_must_fail, but tolerates success, too.  This is
 514# meant to be used in contexts like:
 515#
 516#       test_expect_success 'some command works without configuration' '
 517#               test_might_fail git config --unset all.configuration &&
 518#               do something
 519#       '
 520#
 521# Writing "git config --unset all.configuration || :" would be wrong,
 522# because we want to notice if it fails due to segv.
 523
 524test_might_fail () {
 525        "$@"
 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
 544test_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
 571test_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
 587test_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
 619test_when_finished () {
 620        test_cleanup="{ $*
 621                } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
 622}
 623
 624# Most tests can use the created repository, but some may need to create more.
 625# Usage: test_create_repo <directory>
 626test_create_repo () {
 627        test "$#" = 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}