Merge branch 'dg/subtree-fixes'
[git] / 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=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 '$1'" >&2; exit 1 ;;
204         esac
205 done
206
207 if test -n "$color"
208 then
209         say_color () {
210                 (
211                 TERM=$ORIGINAL_TERM
212                 export TERM
213                 case "$1" in
214                 error)
215                         tput bold; tput setaf 1;; # bold red
216                 skip)
217                         tput setaf 4;; # blue
218                 warn)
219                         tput setaf 3;; # brown/yellow
220                 pass)
221                         tput setaf 2;; # green
222                 info)
223                         tput setaf 6;; # cyan
224                 *)
225                         test -n "$quiet" && return;;
226                 esac
227                 shift
228                 printf "%s" "$*"
229                 tput sgr0
230                 echo
231                 )
232         }
233 else
234         say_color() {
235                 test -z "$1" && test -n "$quiet" && return
236                 shift
237                 printf "%s\n" "$*"
238         }
239 fi
240
241 error () {
242         say_color error "error: $*"
243         GIT_EXIT_OK=t
244         exit 1
245 }
246
247 say () {
248         say_color info "$*"
249 }
250
251 test "${test_description}" != "" ||
252 error "Test script did not set test_description."
253
254 if test "$help" = "t"
255 then
256         echo "$test_description"
257         exit 0
258 fi
259
260 exec 5>&1
261 exec 6<&0
262 if test "$verbose" = "t"
263 then
264         exec 4>&2 3>&1
265 else
266         exec 4>/dev/null 3>/dev/null
267 fi
268
269 test_failure=0
270 test_count=0
271 test_fixed=0
272 test_broken=0
273 test_success=0
274
275 test_external_has_tap=0
276
277 die () {
278         code=$?
279         if test -n "$GIT_EXIT_OK"
280         then
281                 exit $code
282         else
283                 echo >&5 "FATAL: Unexpected exit with code $code"
284                 exit 1
285         fi
286 }
287
288 GIT_EXIT_OK=
289 trap 'die' EXIT
290
291 # The user-facing functions are loaded from a separate file so that
292 # test_perf subshells can have them too
293 . "$TEST_DIRECTORY/test-lib-functions.sh"
294
295 # You are not expected to call test_ok_ and test_failure_ directly, use
296 # the text_expect_* functions instead.
297
298 test_ok_ () {
299         test_success=$(($test_success + 1))
300         say_color "" "ok $test_count - $@"
301 }
302
303 test_failure_ () {
304         test_failure=$(($test_failure + 1))
305         say_color error "not ok $test_count - $1"
306         shift
307         echo "$@" | sed -e 's/^/#       /'
308         test "$immediate" = "" || { GIT_EXIT_OK=t; exit 1; }
309 }
310
311 test_known_broken_ok_ () {
312         test_fixed=$(($test_fixed+1))
313         say_color error "ok $test_count - $@ # TODO known breakage vanished"
314 }
315
316 test_known_broken_failure_ () {
317         test_broken=$(($test_broken+1))
318         say_color warn "not ok $test_count - $@ # TODO known breakage"
319 }
320
321 test_debug () {
322         test "$debug" = "" || eval "$1"
323 }
324
325 test_eval_ () {
326         # This is a separate function because some tests use
327         # "return" to end a test_expect_success block early.
328         eval </dev/null >&3 2>&4 "$*"
329 }
330
331 test_run_ () {
332         test_cleanup=:
333         expecting_failure=$2
334         test_eval_ "$1"
335         eval_ret=$?
336
337         if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
338         then
339                 setup_malloc_check
340                 test_eval_ "$test_cleanup"
341                 teardown_malloc_check
342         fi
343         if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"
344         then
345                 echo ""
346         fi
347         return "$eval_ret"
348 }
349
350 test_skip () {
351         test_count=$(($test_count+1))
352         to_skip=
353         for skp in $GIT_SKIP_TESTS
354         do
355                 case $this_test.$test_count in
356                 $skp)
357                         to_skip=t
358                         break
359                 esac
360         done
361         if test -z "$to_skip" && test -n "$test_prereq" &&
362            ! test_have_prereq "$test_prereq"
363         then
364                 to_skip=t
365         fi
366         case "$to_skip" in
367         t)
368                 of_prereq=
369                 if test "$missing_prereq" != "$test_prereq"
370                 then
371                         of_prereq=" of $test_prereq"
372                 fi
373
374                 say_color skip >&3 "skipping test: $@"
375                 say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
376                 : true
377                 ;;
378         *)
379                 false
380                 ;;
381         esac
382 }
383
384 # stub; perf-lib overrides it
385 test_at_end_hook_ () {
386         :
387 }
388
389 test_done () {
390         GIT_EXIT_OK=t
391
392         if test -z "$HARNESS_ACTIVE"
393         then
394                 test_results_dir="$TEST_OUTPUT_DIRECTORY/test-results"
395                 mkdir -p "$test_results_dir"
396                 base=${0##*/}
397                 test_results_path="$test_results_dir/${base%.sh}-$$.counts"
398
399                 cat >>"$test_results_path" <<-EOF
400                 total $test_count
401                 success $test_success
402                 fixed $test_fixed
403                 broken $test_broken
404                 failed $test_failure
405
406                 EOF
407         fi
408
409         if test "$test_fixed" != 0
410         then
411                 say_color error "# $test_fixed known breakage(s) vanished; please update test(s)"
412         fi
413         if test "$test_broken" != 0
414         then
415                 say_color warn "# still have $test_broken known breakage(s)"
416         fi
417         if test "$test_broken" != 0 || test "$test_fixed" != 0
418         then
419                 test_remaining=$(( $test_count - $test_broken - $test_fixed ))
420                 msg="remaining $test_remaining test(s)"
421         else
422                 test_remaining=$test_count
423                 msg="$test_count test(s)"
424         fi
425         case "$test_failure" in
426         0)
427                 # Maybe print SKIP message
428                 if test -n "$skip_all" && test $test_count -gt 0
429                 then
430                         error "Can't use skip_all after running some tests"
431                 fi
432                 [ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
433
434                 if test $test_external_has_tap -eq 0
435                 then
436                         if test $test_remaining -gt 0
437                         then
438                                 say_color pass "# passed all $msg"
439                         fi
440                         say "1..$test_count$skip_all"
441                 fi
442
443                 test -d "$remove_trash" &&
444                 cd "$(dirname "$remove_trash")" &&
445                 rm -rf "$(basename "$remove_trash")"
446
447                 test_at_end_hook_
448
449                 exit 0 ;;
450
451         *)
452                 if test $test_external_has_tap -eq 0
453                 then
454                         say_color error "# failed $test_failure among $msg"
455                         say "1..$test_count"
456                 fi
457
458                 exit 1 ;;
459
460         esac
461 }
462
463 if test -n "$valgrind"
464 then
465         make_symlink () {
466                 test -h "$2" &&
467                 test "$1" = "$(readlink "$2")" || {
468                         # be super paranoid
469                         if mkdir "$2".lock
470                         then
471                                 rm -f "$2" &&
472                                 ln -s "$1" "$2" &&
473                                 rm -r "$2".lock
474                         else
475                                 while test -d "$2".lock
476                                 do
477                                         say "Waiting for lock on $2."
478                                         sleep 1
479                                 done
480                         fi
481                 }
482         }
483
484         make_valgrind_symlink () {
485                 # handle only executables, unless they are shell libraries that
486                 # need to be in the exec-path.  We will just use "#!" as a
487                 # guess for a shell-script, since we have no idea what the user
488                 # may have configured as the shell path.
489                 test -x "$1" ||
490                 test "#!" = "$(head -c 2 <"$1")" ||
491                 return;
492
493                 base=$(basename "$1")
494                 symlink_target=$GIT_BUILD_DIR/$base
495                 # do not override scripts
496                 if test -x "$symlink_target" &&
497                     test ! -d "$symlink_target" &&
498                     test "#!" != "$(head -c 2 < "$symlink_target")"
499                 then
500                         symlink_target=../valgrind.sh
501                 fi
502                 case "$base" in
503                 *.sh|*.perl)
504                         symlink_target=../unprocessed-script
505                 esac
506                 # create the link, or replace it if it is out of date
507                 make_symlink "$symlink_target" "$GIT_VALGRIND/bin/$base" || exit
508         }
509
510         # override all git executables in TEST_DIRECTORY/..
511         GIT_VALGRIND=$TEST_DIRECTORY/valgrind
512         mkdir -p "$GIT_VALGRIND"/bin
513         for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
514         do
515                 make_valgrind_symlink $file
516         done
517         # special-case the mergetools loadables
518         make_symlink "$GIT_BUILD_DIR"/mergetools "$GIT_VALGRIND/bin/mergetools"
519         OLDIFS=$IFS
520         IFS=:
521         for path in $PATH
522         do
523                 ls "$path"/git-* 2> /dev/null |
524                 while read file
525                 do
526                         make_valgrind_symlink "$file"
527                 done
528         done
529         IFS=$OLDIFS
530         PATH=$GIT_VALGRIND/bin:$PATH
531         GIT_EXEC_PATH=$GIT_VALGRIND/bin
532         export GIT_VALGRIND
533 elif test -n "$GIT_TEST_INSTALLED"
534 then
535         GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
536         error "Cannot run git from $GIT_TEST_INSTALLED."
537         PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
538         GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
539 else # normal case, use ../bin-wrappers only unless $with_dashes:
540         git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
541         if ! test -x "$git_bin_dir/git"
542         then
543                 if test -z "$with_dashes"
544                 then
545                         say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
546                 fi
547                 with_dashes=t
548         fi
549         PATH="$git_bin_dir:$PATH"
550         GIT_EXEC_PATH=$GIT_BUILD_DIR
551         if test -n "$with_dashes"
552         then
553                 PATH="$GIT_BUILD_DIR:$PATH"
554         fi
555 fi
556 GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
557 unset GIT_CONFIG
558 GIT_CONFIG_NOSYSTEM=1
559 GIT_ATTR_NOSYSTEM=1
560 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_ATTR_NOSYSTEM
561
562 if test -z "$GIT_TEST_CMP"
563 then
564         if test -n "$GIT_TEST_CMP_USE_COPIED_CONTEXT"
565         then
566                 GIT_TEST_CMP="$DIFF -c"
567         else
568                 GIT_TEST_CMP="$DIFF -u"
569         fi
570 fi
571
572 GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
573 export GITPERLLIB
574 test -d "$GIT_BUILD_DIR"/templates/blt || {
575         error "You haven't built things yet, have you?"
576 }
577
578 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
579 then
580         GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
581         export GITPYTHONLIB
582         test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
583                 error "You haven't built git_remote_helpers yet, have you?"
584         }
585 fi
586
587 if ! test -x "$GIT_BUILD_DIR"/test-chmtime
588 then
589         echo >&2 'You need to build test-chmtime:'
590         echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
591         exit 1
592 fi
593
594 # Test repository
595 test="trash directory.$(basename "$0" .sh)"
596 test -n "$root" && test="$root/$test"
597 case "$test" in
598 /*) TRASH_DIRECTORY="$test" ;;
599  *) TRASH_DIRECTORY="$TEST_OUTPUT_DIRECTORY/$test" ;;
600 esac
601 test ! -z "$debug" || remove_trash=$TRASH_DIRECTORY
602 rm -fr "$test" || {
603         GIT_EXIT_OK=t
604         echo >&5 "FATAL: Cannot prepare test area"
605         exit 1
606 }
607
608 HOME="$TRASH_DIRECTORY"
609 export HOME
610
611 if test -z "$TEST_NO_CREATE_REPO"
612 then
613         test_create_repo "$test"
614 else
615         mkdir -p "$test"
616 fi
617 # Use -P to resolve symlinks in our working directory so that the cwd
618 # in subprocesses like git equals our $PWD (for pathname comparisons).
619 cd -P "$test" || exit 1
620
621 this_test=${0##*/}
622 this_test=${this_test%%-*}
623 for skp in $GIT_SKIP_TESTS
624 do
625         case "$this_test" in
626         $skp)
627                 say_color info >&3 "skipping test $this_test altogether"
628                 skip_all="skip all tests in $this_test"
629                 test_done
630         esac
631 done
632
633 # Provide an implementation of the 'yes' utility
634 yes () {
635         if test $# = 0
636         then
637                 y=y
638         else
639                 y="$*"
640         fi
641
642         while echo "$y"
643         do
644                 :
645         done
646 }
647
648 # Fix some commands on Windows
649 case $(uname -s) in
650 *MINGW*)
651         # Windows has its own (incompatible) sort and find
652         sort () {
653                 /usr/bin/sort "$@"
654         }
655         find () {
656                 /usr/bin/find "$@"
657         }
658         sum () {
659                 md5sum "$@"
660         }
661         # git sees Windows-style pwd
662         pwd () {
663                 builtin pwd -W
664         }
665         # no POSIX permissions
666         # backslashes in pathspec are converted to '/'
667         # exec does not inherit the PID
668         test_set_prereq MINGW
669         test_set_prereq NOT_CYGWIN
670         test_set_prereq SED_STRIPS_CR
671         ;;
672 *CYGWIN*)
673         test_set_prereq POSIXPERM
674         test_set_prereq EXECKEEPSPID
675         test_set_prereq NOT_MINGW
676         test_set_prereq CYGWIN
677         test_set_prereq SED_STRIPS_CR
678         ;;
679 *)
680         test_set_prereq POSIXPERM
681         test_set_prereq BSLASHPSPEC
682         test_set_prereq EXECKEEPSPID
683         test_set_prereq NOT_MINGW
684         test_set_prereq NOT_CYGWIN
685         ;;
686 esac
687
688 ( COLUMNS=1 && test $COLUMNS = 1 ) && test_set_prereq COLUMNS_CAN_BE_1
689 test -z "$NO_PERL" && test_set_prereq PERL
690 test -z "$NO_PYTHON" && test_set_prereq PYTHON
691 test -n "$USE_LIBPCRE" && test_set_prereq LIBPCRE
692 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
693
694 # Can we rely on git's output in the C locale?
695 if test -n "$GETTEXT_POISON"
696 then
697         GIT_GETTEXT_POISON=YesPlease
698         export GIT_GETTEXT_POISON
699         test_set_prereq GETTEXT_POISON
700 else
701         test_set_prereq C_LOCALE_OUTPUT
702 fi
703
704 # Use this instead of test_cmp to compare files that contain expected and
705 # actual output from git commands that can be translated.  When running
706 # under GETTEXT_POISON this pretends that the command produced expected
707 # results.
708 test_i18ncmp () {
709         test -n "$GETTEXT_POISON" || test_cmp "$@"
710 }
711
712 # Use this instead of "grep expected-string actual" to see if the
713 # output from a git command that can be translated either contains an
714 # expected string, or does not contain an unwanted one.  When running
715 # under GETTEXT_POISON this pretends that the command produced expected
716 # results.
717 test_i18ngrep () {
718         if test -n "$GETTEXT_POISON"
719         then
720             : # pretend success
721         elif test "x!" = "x$1"
722         then
723                 shift
724                 ! grep "$@"
725         else
726                 grep "$@"
727         fi
728 }
729
730 test_lazy_prereq SYMLINKS '
731         # test whether the filesystem supports symbolic links
732         ln -s x y && test -h y
733 '
734
735 test_lazy_prereq CASE_INSENSITIVE_FS '
736         echo good >CamelCase &&
737         echo bad >camelcase &&
738         test "$(cat CamelCase)" != good
739 '
740
741 test_lazy_prereq UTF8_NFD_TO_NFC '
742         # check whether FS converts nfd unicode to nfc
743         auml=$(printf "\303\244")
744         aumlcdiar=$(printf "\141\314\210")
745         >"$auml" &&
746         case "$(echo *)" in
747         "$aumlcdiar")
748                 true ;;
749         *)
750                 false ;;
751         esac
752 '
753
754 test_lazy_prereq AUTOIDENT '
755         sane_unset GIT_AUTHOR_NAME &&
756         sane_unset GIT_AUTHOR_EMAIL &&
757         git var GIT_AUTHOR_IDENT
758 '
759
760 # When the tests are run as root, permission tests will report that
761 # things are writable when they shouldn't be.
762 test -w / || test_set_prereq SANITY