t / test-lib.shon commit Merge branch 'kk/revwalk-slop-too-many-commit-within-a-second' into maint-1.8.1 (6437980)
   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# 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=$(pwd)
  29fi
  30if test -z "$TEST_OUTPUT_DIRECTORY"
  31then
  32        # Similarly, override this to store the test-results subdir
  33        # elsewhere
  34        TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  35fi
  36GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  37
  38################################################################
  39# It appears that people try to run tests without building...
  40"$GIT_BUILD_DIR/git" >/dev/null
  41if test $? != 1
  42then
  43        echo >&2 'error: you do not seem to have built git yet.'
  44        exit 1
  45fi
  46
  47. "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  48export PERL_PATH SHELL_PATH
  49
  50# if --tee was passed, write the output not only to the terminal, but
  51# additionally to the file test-results/$BASENAME.out, too.
  52case "$GIT_TEST_TEE_STARTED, $* " in
  53done,*)
  54        # do not redirect again
  55        ;;
  56*' --tee '*|*' --va'*)
  57        mkdir -p test-results
  58        BASE=test-results/$(basename "$0" .sh)
  59        (GIT_TEST_TEE_STARTED=done ${SHELL_PATH} "$0" "$@" 2>&1;
  60         echo $? > $BASE.exit) | tee $BASE.out
  61        test "$(cat $BASE.exit)" = 0
  62        exit
  63        ;;
  64esac
  65
  66# For repeatability, reset the environment to known value.
  67LANG=C
  68LC_ALL=C
  69PAGER=cat
  70TZ=UTC
  71TERM=dumb
  72export LANG LC_ALL PAGER TERM TZ
  73EDITOR=:
  74# A call to "unset" with no arguments causes at least Solaris 10
  75# /usr/xpg4/bin/sh and /bin/ksh to bail out.  So keep the unsets
  76# deriving from the command substitution clustered with the other
  77# ones.
  78unset VISUAL EMAIL LANGUAGE COLUMNS $("$PERL_PATH" -e '
  79        my @env = keys %ENV;
  80        my $ok = join("|", qw(
  81                TRACE
  82                DEBUG
  83                USE_LOOKUP
  84                TEST
  85                .*_TEST
  86                PROVE
  87                VALGRIND
  88                UNZIP
  89                PERF_
  90        ));
  91        my @vars = grep(/^GIT_/ && !/^GIT_($ok)/o, @env);
  92        print join("\n", @vars);
  93')
  94unset XDG_CONFIG_HOME
  95GIT_AUTHOR_EMAIL=author@example.com
  96GIT_AUTHOR_NAME='A U Thor'
  97GIT_COMMITTER_EMAIL=committer@example.com
  98GIT_COMMITTER_NAME='C O Mitter'
  99GIT_MERGE_VERBOSITY=5
 100GIT_MERGE_AUTOEDIT=no
 101export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 102export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 103export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 104export EDITOR
 105
 106# Add libc MALLOC and MALLOC_PERTURB test
 107# only if we are not executing the test with valgrind
 108if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 109   test -n "$TEST_NO_MALLOC_CHECK"
 110then
 111        setup_malloc_check () {
 112                : nothing
 113        }
 114        teardown_malloc_check () {
 115                : nothing
 116        }
 117else
 118        setup_malloc_check () {
 119                MALLOC_CHECK_=3 MALLOC_PERTURB_=165
 120                export MALLOC_CHECK_ MALLOC_PERTURB_
 121        }
 122        teardown_malloc_check () {
 123                unset MALLOC_CHECK_ MALLOC_PERTURB_
 124        }
 125fi
 126
 127# Protect ourselves from common misconfiguration to export
 128# CDPATH into the environment
 129unset CDPATH
 130
 131unset GREP_OPTIONS
 132unset UNZIP
 133
 134case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 1351|2|true)
 136        echo "* warning: Some tests will not work if GIT_TRACE" \
 137                "is set as to trace on STDERR ! *"
 138        echo "* warning: Please set GIT_TRACE to something" \
 139                "other than 1, 2 or true ! *"
 140        ;;
 141esac
 142
 143# Convenience
 144#
 145# A regexp to match 5 and 40 hexdigits
 146_x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 147_x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 148
 149# Zero SHA-1
 150_z40=0000000000000000000000000000000000000000
 151
 152# Line feed
 153LF='
 154'
 155
 156export _x05 _x40 _z40 LF
 157
 158# Each test should start with something like this, after copyright notices:
 159#
 160# test_description='Description of this test...
 161# This test checks if command xyzzy does the right thing...
 162# '
 163# . ./test-lib.sh
 164[ "x$ORIGINAL_TERM" != "xdumb" ] && (
 165                TERM=$ORIGINAL_TERM &&
 166                export TERM &&
 167                [ -t 1 ] &&
 168                tput bold >/dev/null 2>&1 &&
 169                tput setaf 1 >/dev/null 2>&1 &&
 170                tput sgr0 >/dev/null 2>&1
 171        ) &&
 172        color=t
 173
 174while test "$#" -ne 0
 175do
 176        case "$1" in
 177        -d|--d|--de|--deb|--debu|--debug)
 178                debug=t; shift ;;
 179        -i|--i|--im|--imm|--imme|--immed|--immedi|--immedia|--immediat|--immediate)
 180                immediate=t; shift ;;
 181        -l|--l|--lo|--lon|--long|--long-|--long-t|--long-te|--long-tes|--long-test|--long-tests)
 182                GIT_TEST_LONG=t; export GIT_TEST_LONG; shift ;;
 183        -h|--h|--he|--hel|--help)
 184                help=t; shift ;;
 185        -v|--v|--ve|--ver|--verb|--verbo|--verbos|--verbose)
 186                verbose=t; shift ;;
 187        -q|--q|--qu|--qui|--quie|--quiet)
 188                # Ignore --quiet under a TAP::Harness. Saying how many tests
 189                # passed without the ok/not ok details is always an error.
 190                test -z "$HARNESS_ACTIVE" && quiet=t; shift ;;
 191        --with-dashes)
 192                with_dashes=t; shift ;;
 193        --no-color)
 194                color=; shift ;;
 195        --va|--val|--valg|--valgr|--valgri|--valgrin|--valgrind)
 196                valgrind=t; verbose=t; shift ;;
 197        --tee)
 198                shift ;; # was handled already
 199        --root=*)
 200                root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 201                shift ;;
 202        *)
 203                echo "error: unknown test option '$1'" >&2; exit 1 ;;
 204        esac
 205done
 206
 207if test -n "$color"
 208then
 209        say_color () {
 210                (
 211                TERM=$ORIGINAL_TERM
 212                export TERM
 213                case "$1" in
 214                error)
 215                        tput bold; tput setaf 1;; # bold red
 216                skip)
 217                        tput bold; tput setaf 2;; # bold green
 218                pass)
 219                        tput setaf 2;;            # green
 220                info)
 221                        tput setaf 3;;            # brown
 222                *)
 223                        test -n "$quiet" && return;;
 224                esac
 225                shift
 226                printf "%s" "$*"
 227                tput sgr0
 228                echo
 229                )
 230        }
 231else
 232        say_color() {
 233                test -z "$1" && test -n "$quiet" && return
 234                shift
 235                printf "%s\n" "$*"
 236        }
 237fi
 238
 239error () {
 240        say_color error "error: $*"
 241        GIT_EXIT_OK=t
 242        exit 1
 243}
 244
 245say () {
 246        say_color info "$*"
 247}
 248
 249test "${test_description}" != "" ||
 250error "Test script did not set test_description."
 251
 252if test "$help" = "t"
 253then
 254        echo "$test_description"
 255        exit 0
 256fi
 257
 258exec 5>&1
 259exec 6<&0
 260if test "$verbose" = "t"
 261then
 262        exec 4>&2 3>&1
 263else
 264        exec 4>/dev/null 3>/dev/null
 265fi
 266
 267test_failure=0
 268test_count=0
 269test_fixed=0
 270test_broken=0
 271test_success=0
 272
 273test_external_has_tap=0
 274
 275die () {
 276        code=$?
 277        if test -n "$GIT_EXIT_OK"
 278        then
 279                exit $code
 280        else
 281                echo >&5 "FATAL: Unexpected exit with code $code"
 282                exit 1
 283        fi
 284}
 285
 286GIT_EXIT_OK=
 287trap 'die' EXIT
 288
 289# The user-facing functions are loaded from a separate file so that
 290# test_perf subshells can have them too
 291. "$TEST_DIRECTORY/test-lib-functions.sh"
 292
 293# You are not expected to call test_ok_ and test_failure_ directly, use
 294# the text_expect_* functions instead.
 295
 296test_ok_ () {
 297        test_success=$(($test_success + 1))
 298        say_color "" "ok $test_count - $@"
 299}
 300
 301test_failure_ () {
 302        test_failure=$(($test_failure + 1))
 303        say_color error "not ok - $test_count $1"
 304        shift
 305        echo "$@" | sed -e 's/^/#       /'
 306        test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 307}
 308
 309test_known_broken_ok_ () {
 310        test_fixed=$(($test_fixed+1))
 311        say_color "" "ok $test_count - $@ # TODO known breakage"
 312}
 313
 314test_known_broken_failure_ () {
 315        test_broken=$(($test_broken+1))
 316        say_color skip "not ok $test_count - $@ # TODO known breakage"
 317}
 318
 319test_debug () {
 320        test "$debug" = "" || eval "$1"
 321}
 322
 323test_eval_ () {
 324        # This is a separate function because some tests use
 325        # "return" to end a test_expect_success block early.
 326        eval </dev/null >&3 2>&4 "$*"
 327}
 328
 329test_run_ () {
 330        test_cleanup=:
 331        expecting_failure=$2
 332        test_eval_ "$1"
 333        eval_ret=$?
 334
 335        if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 336        then
 337                setup_malloc_check
 338                test_eval_ "$test_cleanup"
 339                teardown_malloc_check
 340        fi
 341        if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 342        then
 343                echo ""
 344        fi
 345        return "$eval_ret"
 346}
 347
 348test_skip () {
 349        test_count=$(($test_count+1))
 350        to_skip=
 351        for skp in $GIT_SKIP_TESTS
 352        do
 353                case $this_test.$test_count in
 354                $skp)
 355                        to_skip=t
 356                        break
 357                esac
 358        done
 359        if test -z "$to_skip" && test -n "$test_prereq" &&
 360           ! test_have_prereq "$test_prereq"
 361        then
 362                to_skip=t
 363        fi
 364        case "$to_skip" in
 365        t)
 366                of_prereq=
 367                if test "$missing_prereq" != "$test_prereq"
 368                then
 369                        of_prereq=" of $test_prereq"
 370                fi
 371
 372                say_color skip >&3 "skipping test: $@"
 373                say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 374                : true
 375                ;;
 376        *)
 377                false
 378                ;;
 379        esac
 380}
 381
 382# stub; perf-lib overrides it
 383test_at_end_hook_ () {
 384        :
 385}
 386
 387test_done () {
 388        GIT_EXIT_OK=t
 389
 390        if test -z "$HARNESS_ACTIVE"
 391        then
 392                test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 393                mkdir -p "$test_results_dir"
 394                base=${0##*/}
 395                test_results_path="$test_results_dir/${base%.sh}-$$.counts"
 396
 397                cat >>"$test_results_path" <<-EOF
 398                total $test_count
 399                success $test_success
 400                fixed $test_fixed
 401                broken $test_broken
 402                failed $test_failure
 403
 404                EOF
 405        fi
 406
 407        if test "$test_fixed" != 0
 408        then
 409                say_color pass "# fixed $test_fixed known breakage(s)"
 410        fi
 411        if test "$test_broken" != 0
 412        then
 413                say_color error "# still have $test_broken known breakage(s)"
 414                msg="remaining $(($test_count-$test_broken)) test(s)"
 415        else
 416                msg="$test_count test(s)"
 417        fi
 418        case "$test_failure" in
 419        0)
 420                # Maybe print SKIP message
 421                if test -n "$skip_all" && test $test_count -gt 0
 422                then
 423                        error "Can't use skip_all after running some tests"
 424                fi
 425                [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 426
 427                if test $test_external_has_tap -eq 0
 428                then
 429                        if test $test_count -gt 0
 430                        then
 431                                say_color pass "# passed all $msg"
 432                        fi
 433                        say "1..$test_count$skip_all"
 434                fi
 435
 436                test -d "$remove_trash" &&
 437                cd "$(dirname "$remove_trash")" &&
 438                rm -rf "$(basename "$remove_trash")"
 439
 440                test_at_end_hook_
 441
 442                exit 0 ;;
 443
 444        *)
 445                if test $test_external_has_tap -eq 0
 446                then
 447                        say_color error "# failed $test_failure among $msg"
 448                        say "1..$test_count"
 449                fi
 450
 451                exit 1 ;;
 452
 453        esac
 454}
 455
 456if test -n "$valgrind"
 457then
 458        make_symlink () {
 459                test -h "$2" &&
 460                test "$1" = "$(readlink "$2")" || {
 461                        # be super paranoid
 462                        if mkdir "$2".lock
 463                        then
 464                                rm -f "$2" &&
 465                                ln -s "$1" "$2" &&
 466                                rm -r "$2".lock
 467                        else
 468                                while test -d "$2".lock
 469                                do
 470                                        say "Waiting for lock on $2."
 471                                        sleep 1
 472                                done
 473                        fi
 474                }
 475        }
 476
 477        make_valgrind_symlink () {
 478                # handle only executables, unless they are shell libraries that
 479                # need to be in the exec-path.  We will just use "#!" as a
 480                # guess for a shell-script, since we have no idea what the user
 481                # may have configured as the shell path.
 482                test -x "$1" ||
 483                test "#!" = "$(head -c 2 <"$1")" ||
 484                return;
 485
 486                base=$(basename "$1")
 487                symlink_target=$GIT_BUILD_DIR/$base
 488                # do not override scripts
 489                if test -x "$symlink_target" &&
 490                    test ! -d "$symlink_target" &&
 491                    test "#!" != "$(head -c 2 < "$symlink_target")"
 492                then
 493                        symlink_target=../valgrind.sh
 494                fi
 495                case "$base" in
 496                *.sh|*.perl)
 497                        symlink_target=../unprocessed-script
 498                esac
 499                # create the link, or replace it if it is out of date
 500                make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 501        }
 502
 503        # override all git executables in TEST_DIRECTORY/..
 504        GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 505        mkdir -p "$GIT_VALGRIND"/bin
 506        for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 507        do
 508                make_valgrind_symlink $file
 509        done
 510        # special-case the mergetools loadables
 511        make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 512        OLDIFS=$IFS
 513        IFS=:
 514        for path in $PATH
 515        do
 516                ls "$path"/git-* 2> /dev/null |
 517                while read file
 518                do
 519                        make_valgrind_symlink "$file"
 520                done
 521        done
 522        IFS=$OLDIFS
 523        PATH=$GIT_VALGRIND/bin:$PATH
 524        GIT_EXEC_PATH=$GIT_VALGRIND/bin
 525        export GIT_VALGRIND
 526elif test -n "$GIT_TEST_INSTALLED"
 527then
 528        GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 529        error "Cannot run git from $GIT_TEST_INSTALLED."
 530        PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 531        GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 532else # normal case, use ../bin-wrappers only unless $with_dashes:
 533        git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 534        if ! test -x "$git_bin_dir/git"
 535        then
 536                if test -z "$with_dashes"
 537                then
 538                        say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 539                fi
 540                with_dashes=t
 541        fi
 542        PATH="$git_bin_dir:$PATH"
 543        GIT_EXEC_PATH=$GIT_BUILD_DIR
 544        if test -n "$with_dashes"
 545        then
 546                PATH="$GIT_BUILD_DIR:$PATH"
 547        fi
 548fi
 549GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 550unset GIT_CONFIG
 551GIT_CONFIG_NOSYSTEM=1
 552GIT_ATTR_NOSYSTEM=1
 553export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 554
 555if test -z "$GIT_TEST_CMP"
 556then
 557        if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 558        then
 559                GIT_TEST_CMP="$DIFF -c"
 560        else
 561                GIT_TEST_CMP="$DIFF -u"
 562        fi
 563fi
 564
 565GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 566export GITPERLLIB
 567test -d "$GIT_BUILD_DIR"/templates/blt || {
 568        error "You haven't built things yet, have you?"
 569}
 570
 571if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 572then
 573        GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 574        export GITPYTHONLIB
 575        test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 576                error "You haven't built git_remote_helpers yet, have you?"
 577        }
 578fi
 579
 580if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 581then
 582        echo >&2 'You need to build test-chmtime:'
 583        echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 584        exit 1
 585fi
 586
 587# Test repository
 588test="trash directory.$(basename "$0" .sh)"
 589test -n "$root" && test="$root/$test"
 590case "$test" in
 591/*) TRASH_DIRECTORY="$test" ;;
 592 *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
 593esac
 594test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 595rm -fr "$test" || {
 596        GIT_EXIT_OK=t
 597        echo >&5 "FATAL: Cannot prepare test area"
 598        exit 1
 599}
 600
 601HOME="$TRASH_DIRECTORY"
 602export HOME
 603
 604if test -z "$TEST_NO_CREATE_REPO"
 605then
 606        test_create_repo "$test"
 607else
 608        mkdir -p "$test"
 609fi
 610# Use -P to resolve symlinks in our working directory so that the cwd
 611# in subprocesses like git equals our $PWD (for pathname comparisons).
 612cd -P "$test" || exit 1
 613
 614this_test=${0##*/}
 615this_test=${this_test%%-*}
 616for skp in $GIT_SKIP_TESTS
 617do
 618        case "$this_test" in
 619        $skp)
 620                say_color skip >&3 "skipping test $this_test altogether"
 621                skip_all="skip all tests in $this_test"
 622                test_done
 623        esac
 624done
 625
 626# Provide an implementation of the 'yes' utility
 627yes () {
 628        if test $# = 0
 629        then
 630                y=y
 631        else
 632                y="$*"
 633        fi
 634
 635        while echo "$y"
 636        do
 637                :
 638        done
 639}
 640
 641# Fix some commands on Windows
 642case $(uname -s) in
 643*MINGW*)
 644        # Windows has its own (incompatible) sort and find
 645        sort () {
 646                /usr/bin/sort "$@"
 647        }
 648        find () {
 649                /usr/bin/find "$@"
 650        }
 651        sum () {
 652                md5sum "$@"
 653        }
 654        # git sees Windows-style pwd
 655        pwd () {
 656                builtin pwd -W
 657        }
 658        # no POSIX permissions
 659        # backslashes in pathspec are converted to '/'
 660        # exec does not inherit the PID
 661        test_set_prereq MINGW
 662        test_set_prereq SED_STRIPS_CR
 663        ;;
 664*CYGWIN*)
 665        test_set_prereq POSIXPERM
 666        test_set_prereq EXECKEEPSPID
 667        test_set_prereq NOT_MINGW
 668        test_set_prereq SED_STRIPS_CR
 669        ;;
 670*)
 671        test_set_prereq POSIXPERM
 672        test_set_prereq BSLASHPSPEC
 673        test_set_prereq EXECKEEPSPID
 674        test_set_prereq NOT_MINGW
 675        ;;
 676esac
 677
 678( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 679test -z "$NO_PERL" && test_set_prereq PERL
 680test -z "$NO_PYTHON" && test_set_prereq PYTHON
 681test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 682test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 683
 684# Can we rely on git's output in the C locale?
 685if test -n "$GETTEXT_POISON"
 686then
 687        GIT_GETTEXT_POISON=YesPlease
 688        export GIT_GETTEXT_POISON
 689        test_set_prereq GETTEXT_POISON
 690else
 691        test_set_prereq C_LOCALE_OUTPUT
 692fi
 693
 694# Use this instead of test_cmp to compare files that contain expected and
 695# actual output from git commands that can be translated.  When running
 696# under GETTEXT_POISON this pretends that the command produced expected
 697# results.
 698test_i18ncmp () {
 699        test -n "$GETTEXT_POISON" || test_cmp "$@"
 700}
 701
 702# Use this instead of "grep expected-string actual" to see if the
 703# output from a git command that can be translated either contains an
 704# expected string, or does not contain an unwanted one.  When running
 705# under GETTEXT_POISON this pretends that the command produced expected
 706# results.
 707test_i18ngrep () {
 708        if test -n "$GETTEXT_POISON"
 709        then
 710            : # pretend success
 711        elif test "x!" = "x$1"
 712        then
 713                shift
 714                ! grep "$@"
 715        else
 716                grep "$@"
 717        fi
 718}
 719
 720test_lazy_prereq SYMLINKS '
 721        # test whether the filesystem supports symbolic links
 722        ln -s x y && test -h y
 723'
 724
 725test_lazy_prereq CASE_INSENSITIVE_FS '
 726        echo good >CamelCase &&
 727        echo bad >camelcase &&
 728        test "$(cat CamelCase)" != good
 729'
 730
 731test_lazy_prereq UTF8_NFD_TO_NFC '
 732        # check whether FS converts nfd unicode to nfc
 733        auml=$(printf "\303\244")
 734        aumlcdiar=$(printf "\141\314\210")
 735        >"$auml" &&
 736        case "$(echo *)" in
 737        "$aumlcdiar")
 738                true ;;
 739        *)
 740                false ;;
 741        esac
 742'
 743
 744test_lazy_prereq AUTOIDENT '
 745        sane_unset GIT_AUTHOR_NAME &&
 746        sane_unset GIT_AUTHOR_EMAIL &&
 747        git var GIT_AUTHOR_IDENT
 748'
 749
 750# When the tests are run as root, permission tests will report that
 751# things are writable when they shouldn't be.
 752test -w / || test_set_prereq SANITY