t / test-lib.shon commit Merge branch 'maint-1.8.5' into maint-1.9 (64a03e9)
   1# Test framework for git.  See t/README for usage.
   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# Keep the original TERM for say_color
  19ORIGINAL_TERM=$TERM
  20
  21# Test the binaries we have just built.  The tests are kept in
  22# t/ subdirectory and are run in 'trash directory' subdirectory.
  23if test -z "$TEST_DIRECTORY"
  24then
  25        # We allow tests to override this, in case they want to run tests
  26        # outside of t/, e.g. for running tests on the test library
  27        # itself.
  28        TEST_DIRECTORY=$(pwd)
  29else
  30        # ensure that TEST_DIRECTORY is an absolute path so that it
  31        # is valid even if the current working directory is changed
  32        TEST_DIRECTORY=$(cd "$TEST_DIRECTORY" && pwd) || exit 1
  33fi
  34if test -z "$TEST_OUTPUT_DIRECTORY"
  35then
  36        # Similarly, override this to store the test-results subdir
  37        # elsewhere
  38        TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  39fi
  40GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  41
  42################################################################
  43# It appears that people try to run tests without building...
  44"$GIT_BUILD_DIR/git" >/dev/null
  45if test $? != 1
  46then
  47        echo >&2 'error: you do not seem to have built git yet.'
  48        exit 1
  49fi
  50
  51. "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  52export PERL_PATH SHELL_PATH
  53
  54# if --tee was passed, write the output not only to the terminal, but
  55# additionally to the file test-results/$BASENAME.out, too.
  56case "$GIT_TEST_TEE_STARTED, $* " in
  57done,*)
  58        # do not redirect again
  59        ;;
  60*' --tee '*|*' --va'*)
  61        mkdir -p "$TEST_OUTPUT_DIRECTORY/test-results"
  62        BASE="$TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" .sh)"
  63        (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
  64         echo $? > $BASE.exit) | tee $BASE.out
  65        test "$(cat $BASE.exit)" = 0
  66        exit
  67        ;;
  68esac
  69
  70# For repeatability, reset the environment to known value.
  71LANG=C
  72LC_ALL=C
  73PAGER=cat
  74TZ=UTC
  75TERM=dumb
  76export LANG LC_ALL PAGER TERM TZ
  77EDITOR=:
  78# A call to "unset" with no arguments causes at least Solaris 10
  79# /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
  80# deriving from the command substitution clustered with the other
  81# ones.
  82unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
  83        my @env = keys %ENV;
  84        my $ok = join("|", qw(
  85                TRACE
  86                DEBUG
  87                USE_LOOKUP
  88                TEST
  89                .*_TEST
  90                PROVE
  91                VALGRIND
  92                UNZIP
  93                PERF_
  94        ));
  95        my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  96        print join("\n", @vars);
  97')
  98unset XDG_CONFIG_HOME
  99unset GITPERLLIB
 100GIT_AUTHOR_EMAIL=author@example.com
 101GIT_AUTHOR_NAME='A U Thor'
 102GIT_COMMITTER_EMAIL=committer@example.com
 103GIT_COMMITTER_NAME='C O Mitter'
 104GIT_MERGE_VERBOSITY=5
 105GIT_MERGE_AUTOEDIT=no
 106export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 107export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 108export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 109export EDITOR
 110
 111# Add libc MALLOC and MALLOC_PERTURB test
 112# only if we are not executing the test with valgrind
 113if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 114   test -n "$TEST_NO_MALLOC_CHECK"
 115then
 116        setup_malloc_check () {
 117                : nothing
 118        }
 119        teardown_malloc_check () {
 120                : nothing
 121        }
 122else
 123        setup_malloc_check () {
 124                MALLOC_CHECK_=3 MALLOC_PERTURB_=165
 125                export MALLOC_CHECK_ MALLOC_PERTURB_
 126        }
 127        teardown_malloc_check () {
 128                unset MALLOC_CHECK_ MALLOC_PERTURB_
 129        }
 130fi
 131
 132# Protect ourselves from common misconfiguration to export
 133# CDPATH into the environment
 134unset CDPATH
 135
 136unset GREP_OPTIONS
 137unset UNZIP
 138
 139case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 1401|2|true)
 141        echo "* warning: Some tests will not work if GIT_TRACE" \
 142                "is set as to trace on STDERR ! *"
 143        echo "* warning: Please set GIT_TRACE to something" \
 144                "other than 1, 2 or true ! *"
 145        ;;
 146esac
 147
 148# Convenience
 149#
 150# A regexp to match 5 and 40 hexdigits
 151_x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 152_x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 153
 154# Zero SHA-1
 155_z40=0000000000000000000000000000000000000000
 156
 157# Line feed
 158LF='
 159'
 160
 161# UTF-8 ZERO WIDTH NON-JOINER, which HFS+ ignores
 162# when case-folding filenames
 163u200c=$(printf '\342\200\214')
 164
 165export _x05 _x40 _z40 LF u200c
 166
 167# Each test should start with something like this, after copyright notices:
 168#
 169# test_description='Description of this test...
 170# This test checks if command xyzzy does the right thing...
 171# '
 172# . ./test-lib.sh
 173[ "x$ORIGINAL_TERM" != "xdumb" ] && (
 174                TERM=$ORIGINAL_TERM &&
 175                export TERM &&
 176                [ -t 1 ] &&
 177                tput bold >/dev/null 2>&1 &&
 178                tput setaf 1 >/dev/null 2>&1 &&
 179                tput sgr0 >/dev/null 2>&1
 180        ) &&
 181        color=t
 182
 183while test "$#" -ne 0
 184do
 185        case "$1" in
 186        -d|--d|--de|--deb|--debu|--debug)
 187                debug=t; shift ;;
 188        -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 189                immediate=t; shift ;;
 190        -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 191                GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 192        -h|--h|--he|--hel|--help)
 193                help=t; shift ;;
 194        -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 195                verbose=t; shift ;;
 196        --verbose-only=*)
 197                verbose_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
 198                shift ;;
 199        -q|--q|--qu|--qui|--quie|--quiet)
 200                # Ignore --quiet under a TAP::Harness. Saying how many tests
 201                # passed without the ok/not ok details is always an error.
 202                test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 203        --with-dashes)
 204                with_dashes=t; shift ;;
 205        --no-color)
 206                color=; shift ;;
 207        --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 208                valgrind=memcheck
 209                shift ;;
 210        --valgrind=*)
 211                valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
 212                shift ;;
 213        --valgrind-only=*)
 214                valgrind_only=$(expr "z$1" : 'z[^=]*=\(.*\)')
 215                shift ;;
 216        --tee)
 217                shift ;; # was handled already
 218        --root=*)
 219                root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 220                shift ;;
 221        *)
 222                echo "error: unknown test option '$1'" >&2; exit 1 ;;
 223        esac
 224done
 225
 226if test -n "$valgrind_only"
 227then
 228        test -z "$valgrind" && valgrind=memcheck
 229        test -z "$verbose" && verbose_only="$valgrind_only"
 230elif test -n "$valgrind"
 231then
 232        verbose=t
 233fi
 234
 235if test -n "$color"
 236then
 237        say_color () {
 238                (
 239                TERM=$ORIGINAL_TERM
 240                export TERM
 241                case "$1" in
 242                error)
 243                        tput bold; tput setaf 1;; # bold red
 244                skip)
 245                        tput setaf 4;; # blue
 246                warn)
 247                        tput setaf 3;; # brown/yellow
 248                pass)
 249                        tput setaf 2;; # green
 250                info)
 251                        tput setaf 6;; # cyan
 252                *)
 253                        test -n "$quiet" && return;;
 254                esac
 255                shift
 256                printf "%s" "$*"
 257                tput sgr0
 258                echo
 259                )
 260        }
 261else
 262        say_color() {
 263                test -z "$1" && test -n "$quiet" && return
 264                shift
 265                printf "%s\n" "$*"
 266        }
 267fi
 268
 269error () {
 270        say_color error "error: $*"
 271        GIT_EXIT_OK=t
 272        exit 1
 273}
 274
 275say () {
 276        say_color info "$*"
 277}
 278
 279test "${test_description}" != "" ||
 280error "Test script did not set test_description."
 281
 282if test "$help" = "t"
 283then
 284        printf '%s\n' "$test_description"
 285        exit 0
 286fi
 287
 288exec 5>&1
 289exec 6<&0
 290if test "$verbose" = "t"
 291then
 292        exec 4>&2 3>&1
 293else
 294        exec 4>/dev/null 3>/dev/null
 295fi
 296
 297test_failure=0
 298test_count=0
 299test_fixed=0
 300test_broken=0
 301test_success=0
 302
 303test_external_has_tap=0
 304
 305die () {
 306        code=$?
 307        if test -n "$GIT_EXIT_OK"
 308        then
 309                exit $code
 310        else
 311                echo >&5 "FATAL: Unexpected exit with code $code"
 312                exit 1
 313        fi
 314}
 315
 316GIT_EXIT_OK=
 317trap 'die' EXIT
 318
 319# The user-facing functions are loaded from a separate file so that
 320# test_perf subshells can have them too
 321. "$TEST_DIRECTORY/test-lib-functions.sh"
 322
 323# You are not expected to call test_ok_ and test_failure_ directly, use
 324# the test_expect_* functions instead.
 325
 326test_ok_ () {
 327        test_success=$(($test_success + 1))
 328        say_color "" "ok $test_count - $@"
 329}
 330
 331test_failure_ () {
 332        test_failure=$(($test_failure + 1))
 333        say_color error "not ok $test_count - $1"
 334        shift
 335        printf '%s\n' "$*" | sed -e 's/^/#      /'
 336        test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 337}
 338
 339test_known_broken_ok_ () {
 340        test_fixed=$(($test_fixed+1))
 341        say_color error "ok $test_count - $@ # TODO known breakage vanished"
 342}
 343
 344test_known_broken_failure_ () {
 345        test_broken=$(($test_broken+1))
 346        say_color warn "not ok $test_count - $@ # TODO known breakage"
 347}
 348
 349test_debug () {
 350        test "$debug" = "" || eval "$1"
 351}
 352
 353match_pattern_list () {
 354        arg="$1"
 355        shift
 356        test -z "$*" && return 1
 357        for pattern_
 358        do
 359                case "$arg" in
 360                $pattern_)
 361                        return 0
 362                esac
 363        done
 364        return 1
 365}
 366
 367maybe_teardown_verbose () {
 368        test -z "$verbose_only" && return
 369        exec 4>/dev/null 3>/dev/null
 370        verbose=
 371}
 372
 373last_verbose=t
 374maybe_setup_verbose () {
 375        test -z "$verbose_only" && return
 376        if match_pattern_list $test_count $verbose_only
 377        then
 378                exec 4>&2 3>&1
 379                # Emit a delimiting blank line when going from
 380                # non-verbose to verbose.  Within verbose mode the
 381                # delimiter is printed by test_expect_*.  The choice
 382                # of the initial $last_verbose is such that before
 383                # test 1, we do not print it.
 384                test -z "$last_verbose" && echo >&3 ""
 385                verbose=t
 386        else
 387                exec 4>/dev/null 3>/dev/null
 388                verbose=
 389        fi
 390        last_verbose=$verbose
 391}
 392
 393maybe_teardown_valgrind () {
 394        test -z "$GIT_VALGRIND" && return
 395        GIT_VALGRIND_ENABLED=
 396}
 397
 398maybe_setup_valgrind () {
 399        test -z "$GIT_VALGRIND" && return
 400        if test -z "$valgrind_only"
 401        then
 402                GIT_VALGRIND_ENABLED=t
 403                return
 404        fi
 405        GIT_VALGRIND_ENABLED=
 406        if match_pattern_list $test_count $valgrind_only
 407        then
 408                GIT_VALGRIND_ENABLED=t
 409        fi
 410}
 411
 412test_eval_ () {
 413        # This is a separate function because some tests use
 414        # "return" to end a test_expect_success block early.
 415        eval </dev/null >&3 2>&4 "$*"
 416}
 417
 418test_run_ () {
 419        test_cleanup=:
 420        expecting_failure=$2
 421        setup_malloc_check
 422        test_eval_ "$1"
 423        eval_ret=$?
 424        teardown_malloc_check
 425
 426        if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 427        then
 428                setup_malloc_check
 429                test_eval_ "$test_cleanup"
 430                teardown_malloc_check
 431        fi
 432        if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 433        then
 434                echo ""
 435        fi
 436        return "$eval_ret"
 437}
 438
 439test_start_ () {
 440        test_count=$(($test_count+1))
 441        maybe_setup_verbose
 442        maybe_setup_valgrind
 443}
 444
 445test_finish_ () {
 446        echo >&3 ""
 447        maybe_teardown_valgrind
 448        maybe_teardown_verbose
 449}
 450
 451test_skip () {
 452        to_skip=
 453        if match_pattern_list $this_test.$test_count $GIT_SKIP_TESTS
 454        then
 455                to_skip=t
 456        fi
 457        if test -z "$to_skip" && test -n "$test_prereq" &&
 458           ! test_have_prereq "$test_prereq"
 459        then
 460                to_skip=t
 461        fi
 462        case "$to_skip" in
 463        t)
 464                of_prereq=
 465                if test "$missing_prereq" != "$test_prereq"
 466                then
 467                        of_prereq=" of $test_prereq"
 468                fi
 469
 470                say_color skip >&3 "skipping test: $@"
 471                say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 472                : true
 473                ;;
 474        *)
 475                false
 476                ;;
 477        esac
 478}
 479
 480# stub; perf-lib overrides it
 481test_at_end_hook_ () {
 482        :
 483}
 484
 485test_done () {
 486        GIT_EXIT_OK=t
 487
 488        if test -z "$HARNESS_ACTIVE"
 489        then
 490                test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 491                mkdir -p "$test_results_dir"
 492                base=${0##*/}
 493                test_results_path="$test_results_dir/${base%.sh}-$$.counts"
 494
 495                cat >>"$test_results_path" <<-EOF
 496                total $test_count
 497                success $test_success
 498                fixed $test_fixed
 499                broken $test_broken
 500                failed $test_failure
 501
 502                EOF
 503        fi
 504
 505        if test "$test_fixed" != 0
 506        then
 507                say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
 508        fi
 509        if test "$test_broken" != 0
 510        then
 511                say_color warn "# still have $test_broken known breakage(s)"
 512        fi
 513        if test "$test_broken" != 0 || test "$test_fixed" != 0
 514        then
 515                test_remaining=$(( $test_count - $test_broken - $test_fixed ))
 516                msg="remaining $test_remaining test(s)"
 517        else
 518                test_remaining=$test_count
 519                msg="$test_count test(s)"
 520        fi
 521        case "$test_failure" in
 522        0)
 523                # Maybe print SKIP message
 524                if test -n "$skip_all" && test $test_count -gt 0
 525                then
 526                        error "Can't use skip_all after running some tests"
 527                fi
 528                [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 529
 530                if test $test_external_has_tap -eq 0
 531                then
 532                        if test $test_remaining -gt 0
 533                        then
 534                                say_color pass "# passed all $msg"
 535                        fi
 536                        say "1..$test_count$skip_all"
 537                fi
 538
 539                test -d "$remove_trash" &&
 540                cd "$(dirname "$remove_trash")" &&
 541                rm -rf "$(basename "$remove_trash")"
 542
 543                test_at_end_hook_
 544
 545                exit 0 ;;
 546
 547        *)
 548                if test $test_external_has_tap -eq 0
 549                then
 550                        say_color error "# failed $test_failure among $msg"
 551                        say "1..$test_count"
 552                fi
 553
 554                exit 1 ;;
 555
 556        esac
 557}
 558
 559if test -n "$valgrind"
 560then
 561        make_symlink () {
 562                test -h "$2" &&
 563                test "$1" = "$(readlink "$2")" || {
 564                        # be super paranoid
 565                        if mkdir "$2".lock
 566                        then
 567                                rm -f "$2" &&
 568                                ln -s "$1" "$2" &&
 569                                rm -r "$2".lock
 570                        else
 571                                while test -d "$2".lock
 572                                do
 573                                        say "Waiting for lock on $2."
 574                                        sleep 1
 575                                done
 576                        fi
 577                }
 578        }
 579
 580        make_valgrind_symlink () {
 581                # handle only executables, unless they are shell libraries that
 582                # need to be in the exec-path.
 583                test -x "$1" ||
 584                test "# " = "$(head -c 2 <"$1")" ||
 585                return;
 586
 587                base=$(basename "$1")
 588                symlink_target=$GIT_BUILD_DIR/$base
 589                # do not override scripts
 590                if test -x "$symlink_target" &&
 591                    test ! -d "$symlink_target" &&
 592                    test "#!" != "$(head -c 2 < "$symlink_target")"
 593                then
 594                        symlink_target=../valgrind.sh
 595                fi
 596                case "$base" in
 597                *.sh|*.perl)
 598                        symlink_target=../unprocessed-script
 599                esac
 600                # create the link, or replace it if it is out of date
 601                make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 602        }
 603
 604        # override all git executables in TEST_DIRECTORY/..
 605        GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 606        mkdir -p "$GIT_VALGRIND"/bin
 607        for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 608        do
 609                make_valgrind_symlink $file
 610        done
 611        # special-case the mergetools loadables
 612        make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 613        OLDIFS=$IFS
 614        IFS=:
 615        for path in $PATH
 616        do
 617                ls "$path"/git-* 2> /dev/null |
 618                while read file
 619                do
 620                        make_valgrind_symlink "$file"
 621                done
 622        done
 623        IFS=$OLDIFS
 624        PATH=$GIT_VALGRIND/bin:$PATH
 625        GIT_EXEC_PATH=$GIT_VALGRIND/bin
 626        export GIT_VALGRIND
 627        GIT_VALGRIND_MODE="$valgrind"
 628        export GIT_VALGRIND_MODE
 629        GIT_VALGRIND_ENABLED=t
 630        test -n "$valgrind_only" && GIT_VALGRIND_ENABLED=
 631        export GIT_VALGRIND_ENABLED
 632elif test -n "$GIT_TEST_INSTALLED"
 633then
 634        GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 635        error "Cannot run git from $GIT_TEST_INSTALLED."
 636        PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 637        GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 638else # normal case, use ../bin-wrappers only unless $with_dashes:
 639        git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 640        if ! test -x "$git_bin_dir/git"
 641        then
 642                if test -z "$with_dashes"
 643                then
 644                        say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 645                fi
 646                with_dashes=t
 647        fi
 648        PATH="$git_bin_dir:$PATH"
 649        GIT_EXEC_PATH=$GIT_BUILD_DIR
 650        if test -n "$with_dashes"
 651        then
 652                PATH="$GIT_BUILD_DIR:$PATH"
 653        fi
 654fi
 655GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 656unset GIT_CONFIG
 657GIT_CONFIG_NOSYSTEM=1
 658GIT_ATTR_NOSYSTEM=1
 659export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 660
 661if test -z "$GIT_TEST_CMP"
 662then
 663        if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 664        then
 665                GIT_TEST_CMP="$DIFF -c"
 666        else
 667                GIT_TEST_CMP="$DIFF -u"
 668        fi
 669fi
 670
 671GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 672export GITPERLLIB
 673test -d "$GIT_BUILD_DIR"/templates/blt || {
 674        error "You haven't built things yet, have you?"
 675}
 676
 677if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 678then
 679        echo >&2 'You need to build test-chmtime:'
 680        echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 681        exit 1
 682fi
 683
 684# Test repository
 685TRASH_DIRECTORY="trash directory.$(basename "$0" .sh)"
 686test -n "$root" && TRASH_DIRECTORY="$root/$TRASH_DIRECTORY"
 687case "$TRASH_DIRECTORY" in
 688/*) ;; # absolute path is good
 689 *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$TRASH_DIRECTORY" ;;
 690esac
 691test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 692rm -fr "$TRASH_DIRECTORY" || {
 693        GIT_EXIT_OK=t
 694        echo >&5 "FATAL: Cannot prepare test area"
 695        exit 1
 696}
 697
 698HOME="$TRASH_DIRECTORY"
 699export HOME
 700
 701if test -z "$TEST_NO_CREATE_REPO"
 702then
 703        test_create_repo "$TRASH_DIRECTORY"
 704else
 705        mkdir -p "$TRASH_DIRECTORY"
 706fi
 707# Use -P to resolve symlinks in our working directory so that the cwd
 708# in subprocesses like git equals our $PWD (for pathname comparisons).
 709cd -P "$TRASH_DIRECTORY" || exit 1
 710
 711this_test=${0##*/}
 712this_test=${this_test%%-*}
 713if match_pattern_list "$this_test" $GIT_SKIP_TESTS
 714then
 715        say_color info >&3 "skipping test $this_test altogether"
 716        skip_all="skip all tests in $this_test"
 717        test_done
 718fi
 719
 720# Provide an implementation of the 'yes' utility
 721yes () {
 722        if test $# = 0
 723        then
 724                y=y
 725        else
 726                y="$*"
 727        fi
 728
 729        while echo "$y"
 730        do
 731                :
 732        done
 733}
 734
 735# Fix some commands on Windows
 736case $(uname -s) in
 737*MINGW*)
 738        # Windows has its own (incompatible) sort and find
 739        sort () {
 740                /usr/bin/sort "$@"
 741        }
 742        find () {
 743                /usr/bin/find "$@"
 744        }
 745        sum () {
 746                md5sum "$@"
 747        }
 748        # git sees Windows-style pwd
 749        pwd () {
 750                builtin pwd -W
 751        }
 752        # no POSIX permissions
 753        # backslashes in pathspec are converted to '/'
 754        # exec does not inherit the PID
 755        test_set_prereq MINGW
 756        test_set_prereq NOT_CYGWIN
 757        test_set_prereq SED_STRIPS_CR
 758        test_set_prereq GREP_STRIPS_CR
 759        GIT_TEST_CMP=mingw_test_cmp
 760        ;;
 761*CYGWIN*)
 762        test_set_prereq POSIXPERM
 763        test_set_prereq EXECKEEPSPID
 764        test_set_prereq NOT_MINGW
 765        test_set_prereq CYGWIN
 766        test_set_prereq SED_STRIPS_CR
 767        test_set_prereq GREP_STRIPS_CR
 768        ;;
 769*)
 770        test_set_prereq POSIXPERM
 771        test_set_prereq BSLASHPSPEC
 772        test_set_prereq EXECKEEPSPID
 773        test_set_prereq NOT_MINGW
 774        test_set_prereq NOT_CYGWIN
 775        ;;
 776esac
 777
 778( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 779test -z "$NO_PERL" && test_set_prereq PERL
 780test -z "$NO_PYTHON" && test_set_prereq PYTHON
 781test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 782test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 783
 784# Can we rely on git's output in the C locale?
 785if test -n "$GETTEXT_POISON"
 786then
 787        GIT_GETTEXT_POISON=YesPlease
 788        export GIT_GETTEXT_POISON
 789        test_set_prereq GETTEXT_POISON
 790else
 791        test_set_prereq C_LOCALE_OUTPUT
 792fi
 793
 794# Use this instead of test_cmp to compare files that contain expected and
 795# actual output from git commands that can be translated.  When running
 796# under GETTEXT_POISON this pretends that the command produced expected
 797# results.
 798test_i18ncmp () {
 799        test -n "$GETTEXT_POISON" || test_cmp "$@"
 800}
 801
 802# Use this instead of "grep expected-string actual" to see if the
 803# output from a git command that can be translated either contains an
 804# expected string, or does not contain an unwanted one.  When running
 805# under GETTEXT_POISON this pretends that the command produced expected
 806# results.
 807test_i18ngrep () {
 808        if test -n "$GETTEXT_POISON"
 809        then
 810            : # pretend success
 811        elif test "x!" = "x$1"
 812        then
 813                shift
 814                ! grep "$@"
 815        else
 816                grep "$@"
 817        fi
 818}
 819
 820test_lazy_prereq PIPE '
 821        # test whether the filesystem supports FIFOs
 822        case $(uname -s) in
 823        CYGWIN*)
 824                false
 825                ;;
 826        *)
 827                rm -f testfifo && mkfifo testfifo
 828                ;;
 829        esac
 830'
 831
 832test_lazy_prereq SYMLINKS '
 833        # test whether the filesystem supports symbolic links
 834        ln -s x y && test -h y
 835'
 836
 837test_lazy_prereq FILEMODE '
 838        test "$(git config --bool core.filemode)" = true
 839'
 840
 841test_lazy_prereq CASE_INSENSITIVE_FS '
 842        echo good >CamelCase &&
 843        echo bad >camelcase &&
 844        test "$(cat CamelCase)" != good
 845'
 846
 847test_lazy_prereq UTF8_NFD_TO_NFC '
 848        # check whether FS converts nfd unicode to nfc
 849        auml=$(printf "\303\244")
 850        aumlcdiar=$(printf "\141\314\210")
 851        >"$auml" &&
 852        case "$(echo *)" in
 853        "$aumlcdiar")
 854                true ;;
 855        *)
 856                false ;;
 857        esac
 858'
 859
 860test_lazy_prereq AUTOIDENT '
 861        sane_unset GIT_AUTHOR_NAME &&
 862        sane_unset GIT_AUTHOR_EMAIL &&
 863        git var GIT_AUTHOR_IDENT
 864'
 865
 866# When the tests are run as root, permission tests will report that
 867# things are writable when they shouldn't be.
 868test -w / || test_set_prereq SANITY
 869
 870GIT_UNZIP=${GIT_UNZIP:-unzip}
 871test_lazy_prereq UNZIP '
 872        "$GIT_UNZIP" -v
 873        test $? -ne 127
 874'