t/test-lib.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Junio C Hamano
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see http://www.gnu.org/licenses/ .
  17
  18 # Keep the original TERM for say_color
  19 ORIGINAL_TERM=$TERM
  20
  21 # Test the binaries we have just built.  The tests are kept in
  22 # t/ subdirectory and are run in 'trash directory' subdirectory.
  23 if test -z "$TEST_DIRECTORY"
  24 then
  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=$(pwd)
  29 fi
  30 if test -z "$TEST_OUTPUT_DIRECTORY"
  31 then
  32         # Similarly, override this to store the test-results subdir
  33         # elsewhere
  34         TEST_OUTPUT_DIRECTORY=$TEST_DIRECTORY
  35 fi
  36 GIT_BUILD_DIR="$TEST_DIRECTORY"/..
  37
  38 ################################################################
  39 # It appears that people try to run tests without building...
  40 "$GIT_BUILD_DIR/git" >/dev/null
  41 if test $? != 1
  42 then
  43         echo >&2 'error: you do not seem to have built git yet.'
  44         exit 1
  45 fi
  46
  47 . "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
  48 export 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/$BASENAME.out, too.
  52 case "$GIT_TEST_TEE_STARTED, $* " in
  53 done,*)
  54         # do not redirect again
  55         ;;
  56 *' --tee '*|*' --va'*)
  57         mkdir -p test-results
  58         BASE=test-results/$(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         ;;
  64 esac
  65
  66 # For repeatability, reset the environment to known value.
  67 LANG=C
  68 LC_ALL=C
  69 PAGER=cat
  70 TZ=UTC
  71 TERM=dumb
  72 export LANG LC_ALL PAGER TERM TZ
  73 EDITOR=:
  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.
  78 unset 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 ')
  94 unset XDG_CONFIG_HOME
  95 GIT_AUTHOR_EMAIL=author@example.com
  96 GIT_AUTHOR_NAME='A U Thor'
  97 GIT_COMMITTER_EMAIL=committer@example.com
  98 GIT_COMMITTER_NAME='C O Mitter'
  99 GIT_MERGE_VERBOSITY=5
 100 GIT_MERGE_AUTOEDIT=no
 101 export GIT_MERGE_VERBOSITY GIT_MERGE_AUTOEDIT
 102 export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
 103 export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
 104 export EDITOR
 105
 106 # Add libc MALLOC and MALLOC_PERTURB test
 107 # only if we are not executing the test with valgrind
 108 if expr " $GIT_TEST_OPTS " : ".* --valgrind " >/dev/null ||
 109    test -n "$TEST_NO_MALLOC_CHECK"
 110 then
 111         setup_malloc_check () {
 112                 : nothing
 113         }
 114         teardown_malloc_check () {
 115                 : nothing
 116         }
 117 else
 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         }
 125 fi
 126
 127 # Protect ourselves from common misconfiguration to export
 128 # CDPATH into the environment
 129 unset CDPATH
 130
 131 unset GREP_OPTIONS
 132 unset UNZIP
 133
 134 case $(echo $GIT_TRACE |tr "[A-Z]" "[a-z]") in
 135 1|2|true)
 136         echo "* warning: Some tests will not work if GIT_TRACE" \
 137                 "is set as to trace on STDERR ! *"
 138         echo "* warning: Please set GIT_TRACE to something" \
 139                 "other than 1, 2 or true ! *"
 140         ;;
 141 esac
 142
 143 # Convenience
 144 #
 145 # A regexp to match 5 and 40 hexdigits
 146 _x05='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 147 _x40="$_x05$_x05$_x05$_x05$_x05$_x05$_x05$_x05"
 148
 149 # Zero SHA-1
 150 _z40=0000000000000000000000000000000000000000
 151
 152 # Line feed
 153 LF='
 154 '
 155
 156 export _x05 _x40 _z40 LF
 157
 158 # Each test should start with something like this, after copyright notices:
 159 #
 160 # test_description='Description of this test...
 161 # This test checks if command xyzzy does the right thing...
 162 # '
 163 # . ./test-lib.sh
 164 [ "x$ORIGINAL_TERM" != "xdumb" ] && (
 165                 TERM=$ORIGINAL_TERM &&
 166                 export TERM &&
 167                 [ -t 1 ] &&
 168                 tput bold >/dev/null 2>&1 &&
 169                 tput setaf 1 >/dev/null 2>&1 &&
 170                 tput sgr0 >/dev/null 2>&1
 171         ) &&
 172         color=t
 173
 174 while test "$#" -ne 0
 175 do
 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=memcheck
 197                 shift ;;
 198         --valgrind=*)
 199                 valgrind=$(expr "z$1" : 'z[^=]*=\(.*\)')
 200                 shift ;;
 201         --tee)
 202                 shift ;; # was handled already
 203         --root=*)
 204                 root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 205                 shift ;;
 206         *)
 207                 echo "error: unknown test option '$1'" >&2; exit 1 ;;
 208         esac
 209 done
 210
 211 test -n "$valgrind" && verbose=t
 212
 213 if test -n "$color"
 214 then
 215         say_color () {
 216                 (
 217                 TERM=$ORIGINAL_TERM
 218                 export TERM
 219                 case "$1" in
 220                 error)
 221                         tput bold; tput setaf 1;; # bold red
 222                 skip)
 223                         tput setaf 4;; # blue
 224                 warn)
 225                         tput setaf 3;; # brown/yellow
 226                 pass)
 227                         tput setaf 2;; # green
 228                 info)
 229                         tput setaf 6;; # cyan
 230                 *)
 231                         test -n "$quiet" && return;;
 232                 esac
 233                 shift
 234                 printf "%s" "$*"
 235                 tput sgr0
 236                 echo
 237                 )
 238         }
 239 else
 240         say_color() {
 241                 test -z "$1" && test -n "$quiet" && return
 242                 shift
 243                 printf "%s\n" "$*"
 244         }
 245 fi
 246
 247 error () {
 248         say_color error "error: $*"
 249         GIT_EXIT_OK=t
 250         exit 1
 251 }
 252
 253 say () {
 254         say_color info "$*"
 255 }
 256
 257 test "${test_description}" != "" ||
 258 error "Test script did not set test_description."
 259
 260 if test "$help" = "t"
 261 then
 262         echo "$test_description"
 263         exit 0
 264 fi
 265
 266 exec 5>&1
 267 exec 6<&0
 268 if test "$verbose" = "t"
 269 then
 270         exec 4>&2 3>&1
 271 else
 272         exec 4>/dev/null 3>/dev/null
 273 fi
 274
 275 test_failure=0
 276 test_count=0
 277 test_fixed=0
 278 test_broken=0
 279 test_success=0
 280
 281 test_external_has_tap=0
 282
 283 die () {
 284         code=$?
 285         if test -n "$GIT_EXIT_OK"
 286         then
 287                 exit $code
 288         else
 289                 echo >&5 "FATAL: Unexpected exit with code $code"
 290                 exit 1
 291         fi
 292 }
 293
 294 GIT_EXIT_OK=
 295 trap 'die' EXIT
 296
 297 # The user-facing functions are loaded from a separate file so that
 298 # test_perf subshells can have them too
 299 . "$TEST_DIRECTORY/test-lib-functions.sh"
 300
 301 # You are not expected to call test_ok_ and test_failure_ directly, use
 302 # the text_expect_* functions instead.
 303
 304 test_ok_ () {
 305         test_success=$(($test_success + 1))
 306         say_color "" "ok $test_count - $@"
 307 }
 308
 309 test_failure_ () {
 310         test_failure=$(($test_failure + 1))
 311         say_color error "not ok $test_count - $1"
 312         shift
 313         echo "$@" | sed -e 's/^/#       /'
 314         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
 315 }
 316
 317 test_known_broken_ok_ () {
 318         test_fixed=$(($test_fixed+1))
 319         say_color error "ok $test_count - $@ # TODO known breakage vanished"
 320 }
 321
 322 test_known_broken_failure_ () {
 323         test_broken=$(($test_broken+1))
 324         say_color warn "not ok $test_count - $@ # TODO known breakage"
 325 }
 326
 327 test_debug () {
 328         test "$debug" = "" || eval "$1"
 329 }
 330
 331 test_eval_ () {
 332         # This is a separate function because some tests use
 333         # "return" to end a test_expect_success block early.
 334         eval </dev/null >&3 2>&4 "$*"
 335 }
 336
 337 test_run_ () {
 338         test_cleanup=:
 339         expecting_failure=$2
 340         test_eval_ "$1"
 341         eval_ret=$?
 342
 343         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
 344         then
 345                 setup_malloc_check
 346                 test_eval_ "$test_cleanup"
 347                 teardown_malloc_check
 348         fi
 349         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
 350         then
 351                 echo ""
 352         fi
 353         return "$eval_ret"
 354 }
 355
 356 test_skip () {
 357         test_count=$(($test_count+1))
 358         to_skip=
 359         for skp in $GIT_SKIP_TESTS
 360         do
 361                 case $this_test.$test_count in
 362                 $skp)
 363                         to_skip=t
 364                         break
 365                 esac
 366         done
 367         if test -z "$to_skip" && test -n "$test_prereq" &&
 368            ! test_have_prereq "$test_prereq"
 369         then
 370                 to_skip=t
 371         fi
 372         case "$to_skip" in
 373         t)
 374                 of_prereq=
 375                 if test "$missing_prereq" != "$test_prereq"
 376                 then
 377                         of_prereq=" of $test_prereq"
 378                 fi
 379
 380                 say_color skip >&3 "skipping test: $@"
 381                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 382                 : true
 383                 ;;
 384         *)
 385                 false
 386                 ;;
 387         esac
 388 }
 389
 390 # stub; perf-lib overrides it
 391 test_at_end_hook_ () {
 392         :
 393 }
 394
 395 test_done () {
 396         GIT_EXIT_OK=t
 397
 398         if test -z "$HARNESS_ACTIVE"
 399         then
 400                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
 401                 mkdir -p "$test_results_dir"
 402                 base=${0##*/}
 403                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
 404
 405                 cat >>"$test_results_path" <<-EOF
 406                 total $test_count
 407                 success $test_success
 408                 fixed $test_fixed
 409                 broken $test_broken
 410                 failed $test_failure
 411
 412                 EOF
 413         fi
 414
 415         if test "$test_fixed" != 0
 416         then
 417                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
 418         fi
 419         if test "$test_broken" != 0
 420         then
 421                 say_color warn "# still have $test_broken known breakage(s)"
 422         fi
 423         if test "$test_broken" != 0 || test "$test_fixed" != 0
 424         then
 425                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
 426                 msg="remaining $test_remaining test(s)"
 427         else
 428                 test_remaining=$test_count
 429                 msg="$test_count test(s)"
 430         fi
 431         case "$test_failure" in
 432         0)
 433                 # Maybe print SKIP message
 434                 if test -n "$skip_all" && test $test_count -gt 0
 435                 then
 436                         error "Can't use skip_all after running some tests"
 437                 fi
 438                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
 439
 440                 if test $test_external_has_tap -eq 0
 441                 then
 442                         if test $test_remaining -gt 0
 443                         then
 444                                 say_color pass "# passed all $msg"
 445                         fi
 446                         say "1..$test_count$skip_all"
 447                 fi
 448
 449                 test -d "$remove_trash" &&
 450                 cd "$(dirname "$remove_trash")" &&
 451                 rm -rf "$(basename "$remove_trash")"
 452
 453                 test_at_end_hook_
 454
 455                 exit 0 ;;
 456
 457         *)
 458                 if test $test_external_has_tap -eq 0
 459                 then
 460                         say_color error "# failed $test_failure among $msg"
 461                         say "1..$test_count"
 462                 fi
 463
 464                 exit 1 ;;
 465
 466         esac
 467 }
 468
 469 if test -n "$valgrind"
 470 then
 471         make_symlink () {
 472                 test -h "$2" &&
 473                 test "$1" = "$(readlink "$2")" || {
 474                         # be super paranoid
 475                         if mkdir "$2".lock
 476                         then
 477                                 rm -f "$2" &&
 478                                 ln -s "$1" "$2" &&
 479                                 rm -r "$2".lock
 480                         else
 481                                 while test -d "$2".lock
 482                                 do
 483                                         say "Waiting for lock on $2."
 484                                         sleep 1
 485                                 done
 486                         fi
 487                 }
 488         }
 489
 490         make_valgrind_symlink () {
 491                 # handle only executables, unless they are shell libraries that
 492                 # need to be in the exec-path.  We will just use "#!" as a
 493                 # guess for a shell-script, since we have no idea what the user
 494                 # may have configured as the shell path.
 495                 test -x "$1" ||
 496                 test "#!" = "$(head -c 2 <"$1")" ||
 497                 return;
 498
 499                 base=$(basename "$1")
 500                 symlink_target=$GIT_BUILD_DIR/$base
 501                 # do not override scripts
 502                 if test -x "$symlink_target" &&
 503                     test ! -d "$symlink_target" &&
 504                     test "#!" != "$(head -c 2 < "$symlink_target")"
 505                 then
 506                         symlink_target=../valgrind.sh
 507                 fi
 508                 case "$base" in
 509                 *.sh|*.perl)
 510                         symlink_target=../unprocessed-script
 511                 esac
 512                 # create the link, or replace it if it is out of date
 513                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
 514         }
 515
 516         # override all git executables in TEST_DIRECTORY/..
 517         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 518         mkdir -p "$GIT_VALGRIND"/bin
 519         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 520         do
 521                 make_valgrind_symlink $file
 522         done
 523         # special-case the mergetools loadables
 524         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
 525         OLDIFS=$IFS
 526         IFS=:
 527         for path in $PATH
 528         do
 529                 ls "$path"/git-* 2> /dev/null |
 530                 while read file
 531                 do
 532                         make_valgrind_symlink "$file"
 533                 done
 534         done
 535         IFS=$OLDIFS
 536         PATH=$GIT_VALGRIND/bin:$PATH
 537         GIT_EXEC_PATH=$GIT_VALGRIND/bin
 538         export GIT_VALGRIND
 539         GIT_VALGRIND_MODE="$valgrind"
 540         export GIT_VALGRIND_MODE
 541 elif test -n "$GIT_TEST_INSTALLED"
 542 then
 543         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 544         error "Cannot run git from $GIT_TEST_INSTALLED."
 545         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 546         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 547 else # normal case, use ../bin-wrappers only unless $with_dashes:
 548         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 549         if ! test -x "$git_bin_dir/git"
 550         then
 551                 if test -z "$with_dashes"
 552                 then
 553                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
 554                 fi
 555                 with_dashes=t
 556         fi
 557         PATH="$git_bin_dir:$PATH"
 558         GIT_EXEC_PATH=$GIT_BUILD_DIR
 559         if test -n "$with_dashes"
 560         then
 561                 PATH="$GIT_BUILD_DIR:$PATH"
 562         fi
 563 fi
 564 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 565 unset GIT_CONFIG
 566 GIT_CONFIG_NOSYSTEM=1
 567 GIT_ATTR_NOSYSTEM=1
 568 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
 569
 570 if test -z "$GIT_TEST_CMP"
 571 then
 572         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
 573         then
 574                 GIT_TEST_CMP="$DIFF -c"
 575         else
 576                 GIT_TEST_CMP="$DIFF -u"
 577         fi
 578 fi
 579
 580 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 581 export GITPERLLIB
 582 test -d "$GIT_BUILD_DIR"/templates/blt || {
 583         error "You haven't built things yet, have you?"
 584 }
 585
 586 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 587 then
 588         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 589         export GITPYTHONLIB
 590         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 591                 error "You haven't built git_remote_helpers yet, have you?"
 592         }
 593 fi
 594
 595 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
 596 then
 597         echo >&2 'You need to build test-chmtime:'
 598         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 599         exit 1
 600 fi
 601
 602 # Test repository
 603 test="trash directory.$(basename "$0" .sh)"
 604 test -n "$root" && test="$root/$test"
 605 case "$test" in
 606 /*) TRASH_DIRECTORY="$test" ;;
 607  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
 608 esac
 609 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
 610 rm -fr "$test" || {
 611         GIT_EXIT_OK=t
 612         echo >&5 "FATAL: Cannot prepare test area"
 613         exit 1
 614 }
 615
 616 HOME="$TRASH_DIRECTORY"
 617 export HOME
 618
 619 if test -z "$TEST_NO_CREATE_REPO"
 620 then
 621         test_create_repo "$test"
 622 else
 623         mkdir -p "$test"
 624 fi
 625 # Use -P to resolve symlinks in our working directory so that the cwd
 626 # in subprocesses like git equals our $PWD (for pathname comparisons).
 627 cd -P "$test" || exit 1
 628
 629 this_test=${0##*/}
 630 this_test=${this_test%%-*}
 631 for skp in $GIT_SKIP_TESTS
 632 do
 633         case "$this_test" in
 634         $skp)
 635                 say_color info >&3 "skipping test $this_test altogether"
 636                 skip_all="skip all tests in $this_test"
 637                 test_done
 638         esac
 639 done
 640
 641 # Provide an implementation of the 'yes' utility
 642 yes () {
 643         if test $# = 0
 644         then
 645                 y=y
 646         else
 647                 y="$*"
 648         fi
 649
 650         while echo "$y"
 651         do
 652                 :
 653         done
 654 }
 655
 656 # Fix some commands on Windows
 657 case $(uname -s) in
 658 *MINGW*)
 659         # Windows has its own (incompatible) sort and find
 660         sort () {
 661                 /usr/bin/sort "$@"
 662         }
 663         find () {
 664                 /usr/bin/find "$@"
 665         }
 666         sum () {
 667                 md5sum "$@"
 668         }
 669         # git sees Windows-style pwd
 670         pwd () {
 671                 builtin pwd -W
 672         }
 673         # no POSIX permissions
 674         # backslashes in pathspec are converted to '/'
 675         # exec does not inherit the PID
 676         test_set_prereq MINGW
 677         test_set_prereq NOT_CYGWIN
 678         test_set_prereq SED_STRIPS_CR
 679         ;;
 680 *CYGWIN*)
 681         test_set_prereq POSIXPERM
 682         test_set_prereq EXECKEEPSPID
 683         test_set_prereq NOT_MINGW
 684         test_set_prereq CYGWIN
 685         test_set_prereq SED_STRIPS_CR
 686         ;;
 687 *)
 688         test_set_prereq POSIXPERM
 689         test_set_prereq BSLASHPSPEC
 690         test_set_prereq EXECKEEPSPID
 691         test_set_prereq NOT_MINGW
 692         test_set_prereq NOT_CYGWIN
 693         ;;
 694 esac
 695
 696 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
 697 test -z "$NO_PERL" && test_set_prereq PERL
 698 test -z "$NO_PYTHON" && test_set_prereq PYTHON
 699 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
 700 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
 701
 702 # Can we rely on git's output in the C locale?
 703 if test -n "$GETTEXT_POISON"
 704 then
 705         GIT_GETTEXT_POISON=YesPlease
 706         export GIT_GETTEXT_POISON
 707         test_set_prereq GETTEXT_POISON
 708 else
 709         test_set_prereq C_LOCALE_OUTPUT
 710 fi
 711
 712 # Use this instead of test_cmp to compare files that contain expected and
 713 # actual output from git commands that can be translated.  When running
 714 # under GETTEXT_POISON this pretends that the command produced expected
 715 # results.
 716 test_i18ncmp () {
 717         test -n "$GETTEXT_POISON" || test_cmp "$@"
 718 }
 719
 720 # Use this instead of "grep expected-string actual" to see if the
 721 # output from a git command that can be translated either contains an
 722 # expected string, or does not contain an unwanted one.  When running
 723 # under GETTEXT_POISON this pretends that the command produced expected
 724 # results.
 725 test_i18ngrep () {
 726         if test -n "$GETTEXT_POISON"
 727         then
 728             : # pretend success
 729         elif test "x!" = "x$1"
 730         then
 731                 shift
 732                 ! grep "$@"
 733         else
 734                 grep "$@"
 735         fi
 736 }
 737
 738 test_lazy_prereq SYMLINKS '
 739         # test whether the filesystem supports symbolic links
 740         ln -s x y && test -h y
 741 '
 742
 743 test_lazy_prereq CASE_INSENSITIVE_FS '
 744         echo good >CamelCase &&
 745         echo bad >camelcase &&
 746         test "$(cat CamelCase)" != good
 747 '
 748
 749 test_lazy_prereq UTF8_NFD_TO_NFC '
 750         # check whether FS converts nfd unicode to nfc
 751         auml=$(printf "\303\244")
 752         aumlcdiar=$(printf "\141\314\210")
 753         >"$auml" &&
 754         case "$(echo *)" in
 755         "$aumlcdiar")
 756                 true ;;
 757         *)
 758                 false ;;
 759         esac
 760 '
 761
 762 test_lazy_prereq AUTOIDENT '
 763         sane_unset GIT_AUTHOR_NAME &&
 764         sane_unset GIT_AUTHOR_EMAIL &&
 765         git var GIT_AUTHOR_IDENT
 766 '
 767
 768 # When the tests are run as root, permission tests will report that
 769 # things are writable when they shouldn't be.
 770 test -w / || test_set_prereq SANITY
 771
 772 GIT_UNZIP=${GIT_UNZIP:-unzip}
 773 test_lazy_prereq UNZIP '
 774         "$GIT_UNZIP" -v
 775         test $? -ne 127
 776 '