1# Library of functions shared by all tests scripts, included by 2# test-lib.sh. 3# 4# Copyright (c) 2005 Junio C Hamano 5# 6# This program is free software: you can redistribute it and/or modify 7# it under the terms of the GNU General Public License as published by 8# the Free Software Foundation, either version 2 of the License, or 9# (at your option) any later version. 10# 11# This program is distributed in the hope that it will be useful, 12# but WITHOUT ANY WARRANTY; without even the implied warranty of 13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14# GNU General Public License for more details. 15# 16# You should have received a copy of the GNU General Public License 17# along with this program. If not, see http://www.gnu.org/licenses/ . 18 19# The semantics of the editor variables are that of invoking 20# sh -c "$EDITOR \"$@\"" files ... 21# 22# If our trash directory contains shell metacharacters, they will be 23# interpreted if we just set $EDITOR directly, so do a little dance with 24# environment variables to work around this. 25# 26# In particular, quoting isn't enough, as the path may contain the same quote 27# that we're using. 28test_set_editor () { 29 FAKE_EDITOR="$1" 30 export FAKE_EDITOR 31 EDITOR='"$FAKE_EDITOR"' 32 export EDITOR 33} 34 35test_set_index_version () { 36 GIT_INDEX_VERSION="$1" 37 export GIT_INDEX_VERSION 38} 39 40test_decode_color () { 41 awk ' 42 function name(n) { 43 if (n == 0) return "RESET"; 44 if (n == 1) return "BOLD"; 45 if (n == 30) return "BLACK"; 46 if (n == 31) return "RED"; 47 if (n == 32) return "GREEN"; 48 if (n == 33) return "YELLOW"; 49 if (n == 34) return "BLUE"; 50 if (n == 35) return "MAGENTA"; 51 if (n == 36) return "CYAN"; 52 if (n == 37) return "WHITE"; 53 if (n == 40) return "BLACK"; 54 if (n == 41) return "BRED"; 55 if (n == 42) return "BGREEN"; 56 if (n == 43) return "BYELLOW"; 57 if (n == 44) return "BBLUE"; 58 if (n == 45) return "BMAGENTA"; 59 if (n == 46) return "BCYAN"; 60 if (n == 47) return "BWHITE"; 61 } 62 { 63 while (match($0, /\033\[[0-9;]*m/) != 0) { 64 printf "%s<", substr($0, 1, RSTART-1); 65 codes = substr($0, RSTART+2, RLENGTH-3); 66 if (length(codes) == 0) 67 printf "%s", name(0) 68 else { 69 n = split(codes, ary, ";"); 70 sep = ""; 71 for (i = 1; i <= n; i++) { 72 printf "%s%s", sep, name(ary[i]); 73 sep = ";" 74 } 75 } 76 printf ">"; 77 $0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1); 78 } 79 print 80 } 81 ' 82} 83 84lf_to_nul () { 85 perl -pe 'y/\012/\000/' 86} 87 88nul_to_q () { 89 perl -pe 'y/\000/Q/' 90} 91 92q_to_nul () { 93 perl -pe 'y/Q/\000/' 94} 95 96q_to_cr () { 97 tr Q '\015' 98} 99 100q_to_tab () { 101 tr Q '\011' 102} 103 104qz_to_tab_space () { 105 tr QZ '\011\040' 106} 107 108append_cr () { 109 sed -e 's/$/Q/' | tr Q '\015' 110} 111 112remove_cr () { 113 tr '\015' Q | sed -e 's/Q$//' 114} 115 116# In some bourne shell implementations, the "unset" builtin returns 117# nonzero status when a variable to be unset was not set in the first 118# place. 119# 120# Use sane_unset when that should not be considered an error. 121 122sane_unset () { 123 unset "$@" 124 return 0 125} 126 127test_tick () { 128 if test -z "${test_tick+set}" 129 then 130 test_tick=1112911993 131 else 132 test_tick=$(($test_tick + 60)) 133 fi 134 GIT_COMMITTER_DATE="$test_tick -0700" 135 GIT_AUTHOR_DATE="$test_tick -0700" 136 export GIT_COMMITTER_DATE GIT_AUTHOR_DATE 137} 138 139# Stop execution and start a shell. This is useful for debugging tests and 140# only makes sense together with "-v". 141# 142# Be sure to remove all invocations of this command before submitting. 143 144test_pause () { 145 if test "$verbose" = t; then 146 "$SHELL_PATH" <&6 >&3 2>&4 147 else 148 error >&5 "test_pause requires --verbose" 149 fi 150} 151 152# Wrap git in gdb. Adding this to a command can make it easier to 153# understand what is going on in a failing test. 154# 155# Example: "debug git checkout master". 156debug () { 157 GIT_TEST_GDB=1 "$@" 158} 159 160# Call test_commit with the arguments 161# [-C <directory>] <message> [<file> [<contents> [<tag>]]]" 162# 163# This will commit a file with the given contents and the given commit 164# message, and tag the resulting commit with the given tag name. 165# 166# <file>, <contents>, and <tag> all default to <message>. 167# 168# If the first argument is "-C", the second argument is used as a path for 169# the git invocations. 170 171test_commit () { 172 notick= && 173 signoff= && 174 indir= && 175 while test $# != 0 176 do 177 case "$1" in 178 --notick) 179 notick=yes 180 ;; 181 --signoff) 182 signoff="$1" 183 ;; 184 -C) 185 indir="$2" 186 shift 187 ;; 188 *) 189 break 190 ;; 191 esac 192 shift 193 done && 194 indir=${indir:+"$indir"/} && 195 file=${2:-"$1.t"} && 196 echo "${3-$1}" > "$indir$file" && 197 git ${indir:+ -C "$indir"} add "$file" && 198 if test -z "$notick" 199 then 200 test_tick 201 fi && 202 git ${indir:+ -C "$indir"} commit $signoff -m "$1" && 203 git ${indir:+ -C "$indir"} tag "${4:-$1}" 204} 205 206# Call test_merge with the arguments "<message> <commit>", where <commit> 207# can be a tag pointing to the commit-to-merge. 208 209test_merge () { 210 test_tick && 211 git merge -m "$1" "$2" && 212 git tag "$1" 213} 214 215# This function helps systems where core.filemode=false is set. 216# Use it instead of plain 'chmod +x' to set or unset the executable bit 217# of a file in the working directory and add it to the index. 218 219test_chmod () { 220 chmod "$@" && 221 git update-index --add "--chmod=$@" 222} 223 224# Unset a configuration variable, but don't fail if it doesn't exist. 225test_unconfig () { 226 config_dir= 227 if test "$1" = -C 228 then 229 shift 230 config_dir=$1 231 shift 232 fi 233 git ${config_dir:+-C "$config_dir"} config --unset-all "$@" 234 config_status=$? 235 case "$config_status" in 236 5) # ok, nothing to unset 237 config_status=0 238 ;; 239 esac 240 return $config_status 241} 242 243# Set git config, automatically unsetting it after the test is over. 244test_config () { 245 config_dir= 246 if test "$1" = -C 247 then 248 shift 249 config_dir=$1 250 shift 251 fi 252 test_when_finished "test_unconfig ${config_dir:+-C '$config_dir'} '$1'" && 253 git ${config_dir:+-C "$config_dir"} config "$@" 254} 255 256test_config_global () { 257 test_when_finished "test_unconfig --global '$1'" && 258 git config --global "$@" 259} 260 261write_script () { 262 { 263 echo "#!${2-"$SHELL_PATH"}" && 264 cat 265 } >"$1" && 266 chmod +x "$1" 267} 268 269# Use test_set_prereq to tell that a particular prerequisite is available. 270# The prerequisite can later be checked for in two ways: 271# 272# - Explicitly using test_have_prereq. 273# 274# - Implicitly by specifying the prerequisite tag in the calls to 275# test_expect_{success,failure,code}. 276# 277# The single parameter is the prerequisite tag (a simple word, in all 278# capital letters by convention). 279 280test_set_prereq () { 281 satisfied_prereq="$satisfied_prereq$1 " 282} 283satisfied_prereq=" " 284lazily_testable_prereq= lazily_tested_prereq= 285 286# Usage: test_lazy_prereq PREREQ 'script' 287test_lazy_prereq () { 288 lazily_testable_prereq="$lazily_testable_prereq$1 " 289 eval test_prereq_lazily_$1=\$2 290} 291 292test_run_lazy_prereq_ () { 293 script=' 294mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" && 295( 296 cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"' 297)' 298 say >&3 "checking prerequisite: $1" 299 say >&3 "$script" 300 test_eval_ "$script" 301 eval_ret=$? 302 rm -rf "$TRASH_DIRECTORY/prereq-test-dir" 303 if test "$eval_ret" = 0; then 304 say >&3 "prerequisite $1 ok" 305 else 306 say >&3 "prerequisite $1 not satisfied" 307 fi 308 return $eval_ret 309} 310 311test_have_prereq () { 312 # prerequisites can be concatenated with ',' 313 save_IFS=$IFS 314 IFS=, 315 set -- $* 316 IFS=$save_IFS 317 318 total_prereq=0 319 ok_prereq=0 320 missing_prereq= 321 322 for prerequisite 323 do 324 case "$prerequisite" in 325 !*) 326 negative_prereq=t 327 prerequisite=${prerequisite#!} 328 ;; 329 *) 330 negative_prereq= 331 esac 332 333 case " $lazily_tested_prereq " in 334 *" $prerequisite "*) 335 ;; 336 *) 337 case " $lazily_testable_prereq " in 338 *" $prerequisite "*) 339 eval "script=\$test_prereq_lazily_$prerequisite" && 340 if test_run_lazy_prereq_ "$prerequisite" "$script" 341 then 342 test_set_prereq $prerequisite 343 fi 344 lazily_tested_prereq="$lazily_tested_prereq$prerequisite " 345 esac 346 ;; 347 esac 348 349 total_prereq=$(($total_prereq + 1)) 350 case "$satisfied_prereq" in 351 *" $prerequisite "*) 352 satisfied_this_prereq=t 353 ;; 354 *) 355 satisfied_this_prereq= 356 esac 357 358 case "$satisfied_this_prereq,$negative_prereq" in 359 t,|,t) 360 ok_prereq=$(($ok_prereq + 1)) 361 ;; 362 *) 363 # Keep a list of missing prerequisites; restore 364 # the negative marker if necessary. 365 prerequisite=${negative_prereq:+!}$prerequisite 366 if test -z "$missing_prereq" 367 then 368 missing_prereq=$prerequisite 369 else 370 missing_prereq="$prerequisite,$missing_prereq" 371 fi 372 esac 373 done 374 375 test $total_prereq = $ok_prereq 376} 377 378test_declared_prereq () { 379 case ",$test_prereq," in 380 *,$1,*) 381 return 0 382 ;; 383 esac 384 return 1 385} 386 387test_verify_prereq () { 388 test -z "$test_prereq" || 389 expr >/dev/null "$test_prereq" : '[A-Z0-9_,!]*$' || 390 error "bug in the test script: '$test_prereq' does not look like a prereq" 391} 392 393test_expect_failure () { 394 test_start_ 395 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 396 test "$#" = 2 || 397 error "bug in the test script: not 2 or 3 parameters to test-expect-failure" 398 test_verify_prereq 399 export test_prereq 400 if ! test_skip "$@" 401 then 402 say >&3 "checking known breakage: $2" 403 if test_run_ "$2" expecting_failure 404 then 405 test_known_broken_ok_ "$1" 406 else 407 test_known_broken_failure_ "$1" 408 fi 409 fi 410 test_finish_ 411} 412 413test_expect_success () { 414 test_start_ 415 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 416 test "$#" = 2 || 417 error "bug in the test script: not 2 or 3 parameters to test-expect-success" 418 test_verify_prereq 419 export test_prereq 420 if ! test_skip "$@" 421 then 422 say >&3 "expecting success: $2" 423 if test_run_ "$2" 424 then 425 test_ok_ "$1" 426 else 427 test_failure_ "$@" 428 fi 429 fi 430 test_finish_ 431} 432 433# test_external runs external test scripts that provide continuous 434# test output about their progress, and succeeds/fails on 435# zero/non-zero exit code. It outputs the test output on stdout even 436# in non-verbose mode, and announces the external script with "# run 437# <n>: ..." before running it. When providing relative paths, keep in 438# mind that all scripts run in "trash directory". 439# Usage: test_external description command arguments... 440# Example: test_external 'Perl API' perl ../path/to/test.pl 441test_external () { 442 test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq= 443 test "$#" = 3 || 444 error >&5 "bug in the test script: not 3 or 4 parameters to test_external" 445 descr="$1" 446 shift 447 test_verify_prereq 448 export test_prereq 449 if ! test_skip "$descr" "$@" 450 then 451 # Announce the script to reduce confusion about the 452 # test output that follows. 453 say_color "" "# run $test_count: $descr ($*)" 454 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG 455 # to be able to use them in script 456 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG 457 # Run command; redirect its stderr to &4 as in 458 # test_run_, but keep its stdout on our stdout even in 459 # non-verbose mode. 460 "$@" 2>&4 461 if test "$?" = 0 462 then 463 if test $test_external_has_tap -eq 0; then 464 test_ok_ "$descr" 465 else 466 say_color "" "# test_external test $descr was ok" 467 test_success=$(($test_success + 1)) 468 fi 469 else 470 if test $test_external_has_tap -eq 0; then 471 test_failure_ "$descr" "$@" 472 else 473 say_color error "# test_external test $descr failed: $@" 474 test_failure=$(($test_failure + 1)) 475 fi 476 fi 477 fi 478} 479 480# Like test_external, but in addition tests that the command generated 481# no output on stderr. 482test_external_without_stderr () { 483 # The temporary file has no (and must have no) security 484 # implications. 485 tmp=${TMPDIR:-/tmp} 486 stderr="$tmp/git-external-stderr.$$.tmp" 487 test_external "$@" 4> "$stderr" 488 test -f "$stderr" || error "Internal error: $stderr disappeared." 489 descr="no stderr: $1" 490 shift 491 say >&3 "# expecting no stderr from previous command" 492 if test ! -s "$stderr" 493 then 494 rm "$stderr" 495 496 if test $test_external_has_tap -eq 0; then 497 test_ok_ "$descr" 498 else 499 say_color "" "# test_external_without_stderr test $descr was ok" 500 test_success=$(($test_success + 1)) 501 fi 502 else 503 if test "$verbose" = t 504 then 505 output=$(echo; echo "# Stderr is:"; cat "$stderr") 506 else 507 output= 508 fi 509 # rm first in case test_failure exits. 510 rm "$stderr" 511 if test $test_external_has_tap -eq 0; then 512 test_failure_ "$descr" "$@" "$output" 513 else 514 say_color error "# test_external_without_stderr test $descr failed: $@: $output" 515 test_failure=$(($test_failure + 1)) 516 fi 517 fi 518} 519 520# debugging-friendly alternatives to "test [-f|-d|-e]" 521# The commands test the existence or non-existence of $1. $2 can be 522# given to provide a more precise diagnosis. 523test_path_is_file () { 524 if ! test -f "$1" 525 then 526 echo "File $1 doesn't exist. $2" 527 false 528 fi 529} 530 531test_path_is_dir () { 532 if ! test -d "$1" 533 then 534 echo "Directory $1 doesn't exist. $2" 535 false 536 fi 537} 538 539# Check if the directory exists and is empty as expected, barf otherwise. 540test_dir_is_empty () { 541 test_path_is_dir "$1" && 542 if test -n "$(ls -a1 "$1" | egrep -v '^\.\.?$')" 543 then 544 echo "Directory '$1' is not empty, it contains:" 545 ls -la "$1" 546 return 1 547 fi 548} 549 550test_path_is_missing () { 551 if test -e "$1" 552 then 553 echo "Path exists:" 554 ls -ld "$1" 555 if test $# -ge 1 556 then 557 echo "$*" 558 fi 559 false 560 fi 561} 562 563# test_line_count checks that a file has the number of lines it 564# ought to. For example: 565# 566# test_expect_success 'produce exactly one line of output' ' 567# do something >output && 568# test_line_count = 1 output 569# ' 570# 571# is like "test $(wc -l <output) = 1" except that it passes the 572# output through when the number of lines is wrong. 573 574test_line_count () { 575 if test $# != 3 576 then 577 error "bug in the test script: not 3 parameters to test_line_count" 578 elif ! test $(wc -l <"$3") "$1" "$2" 579 then 580 echo "test_line_count: line count for $3 !$1 $2" 581 cat "$3" 582 return 1 583 fi 584} 585 586# Returns success if a comma separated string of keywords ($1) contains a 587# given keyword ($2). 588# Examples: 589# `list_contains "foo,bar" bar` returns 0 590# `list_contains "foo" bar` returns 1 591 592list_contains () { 593 case ",$1," in 594 *,$2,*) 595 return 0 596 ;; 597 esac 598 return 1 599} 600 601# This is not among top-level (test_expect_success | test_expect_failure) 602# but is a prefix that can be used in the test script, like: 603# 604# test_expect_success 'complain and die' ' 605# do something && 606# do something else && 607# test_must_fail git checkout ../outerspace 608# ' 609# 610# Writing this as "! git checkout ../outerspace" is wrong, because 611# the failure could be due to a segv. We want a controlled failure. 612 613test_must_fail () { 614 case "$1" in 615 ok=*) 616 _test_ok=${1#ok=} 617 shift 618 ;; 619 *) 620 _test_ok= 621 ;; 622 esac 623 "$@" 624 exit_code=$? 625 if test $exit_code -eq 0 && ! list_contains "$_test_ok" success 626 then 627 echo >&2 "test_must_fail: command succeeded: $*" 628 return 1 629 elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe 630 then 631 return 0 632 elif test $exit_code -gt 129 && test $exit_code -le 192 633 then 634 echo >&2 "test_must_fail: died by signal $(($exit_code - 128)): $*" 635 return 1 636 elif test $exit_code -eq 127 637 then 638 echo >&2 "test_must_fail: command not found: $*" 639 return 1 640 elif test $exit_code -eq 126 641 then 642 echo >&2 "test_must_fail: valgrind error: $*" 643 return 1 644 fi 645 return 0 646} 647 648# Similar to test_must_fail, but tolerates success, too. This is 649# meant to be used in contexts like: 650# 651# test_expect_success 'some command works without configuration' ' 652# test_might_fail git config --unset all.configuration && 653# do something 654# ' 655# 656# Writing "git config --unset all.configuration || :" would be wrong, 657# because we want to notice if it fails due to segv. 658 659test_might_fail () { 660 test_must_fail ok=success "$@" 661} 662 663# Similar to test_must_fail and test_might_fail, but check that a 664# given command exited with a given exit code. Meant to be used as: 665# 666# test_expect_success 'Merge with d/f conflicts' ' 667# test_expect_code 1 git merge "merge msg" B master 668# ' 669 670test_expect_code () { 671 want_code=$1 672 shift 673 "$@" 674 exit_code=$? 675 if test $exit_code = $want_code 676 then 677 return 0 678 fi 679 680 echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*" 681 return 1 682} 683 684# test_cmp is a helper function to compare actual and expected output. 685# You can use it like: 686# 687# test_expect_success 'foo works' ' 688# echo expected >expected && 689# foo >actual && 690# test_cmp expected actual 691# ' 692# 693# This could be written as either "cmp" or "diff -u", but: 694# - cmp's output is not nearly as easy to read as diff -u 695# - not all diff versions understand "-u" 696 697test_cmp() { 698 $GIT_TEST_CMP "$@" 699} 700 701# test_cmp_bin - helper to compare binary files 702 703test_cmp_bin() { 704 cmp "$@" 705} 706 707# Call any command "$@" but be more verbose about its 708# failure. This is handy for commands like "test" which do 709# not output anything when they fail. 710verbose () { 711 "$@" && return 0 712 echo >&2 "command failed: $(git rev-parse --sq-quote "$@")" 713 return 1 714} 715 716# Check if the file expected to be empty is indeed empty, and barfs 717# otherwise. 718 719test_must_be_empty () { 720 if test -s "$1" 721 then 722 echo "'$1' is not empty, it contains:" 723 cat "$1" 724 return 1 725 fi 726} 727 728# Tests that its two parameters refer to the same revision 729test_cmp_rev () { 730 git rev-parse --verify "$1" >expect.rev && 731 git rev-parse --verify "$2" >actual.rev && 732 test_cmp expect.rev actual.rev 733} 734 735# Print a sequence of integers in increasing order, either with 736# two arguments (start and end): 737# 738# test_seq 1 5 -- outputs 1 2 3 4 5 one line at a time 739# 740# or with one argument (end), in which case it starts counting 741# from 1. 742 743test_seq () { 744 case $# in 745 1) set 1 "$@" ;; 746 2) ;; 747 *) error "bug in the test script: not 1 or 2 parameters to test_seq" ;; 748 esac 749 test_seq_counter__=$1 750 while test "$test_seq_counter__" -le "$2" 751 do 752 echo "$test_seq_counter__" 753 test_seq_counter__=$(( $test_seq_counter__ + 1 )) 754 done 755} 756 757# This function can be used to schedule some commands to be run 758# unconditionally at the end of the test to restore sanity: 759# 760# test_expect_success 'test core.capslock' ' 761# git config core.capslock true && 762# test_when_finished "git config --unset core.capslock" && 763# hello world 764# ' 765# 766# That would be roughly equivalent to 767# 768# test_expect_success 'test core.capslock' ' 769# git config core.capslock true && 770# hello world 771# git config --unset core.capslock 772# ' 773# 774# except that the greeting and config --unset must both succeed for 775# the test to pass. 776# 777# Note that under --immediate mode, no clean-up is done to help diagnose 778# what went wrong. 779 780test_when_finished () { 781 # We cannot detect when we are in a subshell in general, but by 782 # doing so on Bash is better than nothing (the test will 783 # silently pass on other shells). 784 test "${BASH_SUBSHELL-0}" = 0 || 785 error "bug in test script: test_when_finished does nothing in a subshell" 786 test_cleanup="{ $* 787 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup" 788} 789 790# Most tests can use the created repository, but some may need to create more. 791# Usage: test_create_repo <directory> 792test_create_repo () { 793 test "$#" = 1 || 794 error "bug in the test script: not 1 parameter to test-create-repo" 795 repo="$1" 796 mkdir -p "$repo" 797 ( 798 cd "$repo" || error "Cannot setup test environment" 799 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 || 800 error "cannot run git init -- have you built things yet?" 801 mv .git/hooks .git/hooks-disabled 802 ) || exit 803} 804 805# This function helps on symlink challenged file systems when it is not 806# important that the file system entry is a symbolic link. 807# Use test_ln_s_add instead of "ln -s x y && git add y" to add a 808# symbolic link entry y to the index. 809 810test_ln_s_add () { 811 if test_have_prereq SYMLINKS 812 then 813 ln -s "$1" "$2" && 814 git update-index --add "$2" 815 else 816 printf '%s' "$1" >"$2" && 817 ln_s_obj=$(git hash-object -w "$2") && 818 git update-index --add --cacheinfo 120000 $ln_s_obj "$2" && 819 # pick up stat info from the file 820 git update-index "$2" 821 fi 822} 823 824# This function writes out its parameters, one per line 825test_write_lines () { 826 printf "%s\n" "$@" 827} 828 829perl () { 830 command "$PERL_PATH" "$@" 831} 832 833# Is the value one of the various ways to spell a boolean true/false? 834test_normalize_bool () { 835 git -c magic.variable="$1" config --bool magic.variable 2>/dev/null 836} 837 838# Given a variable $1, normalize the value of it to one of "true", 839# "false", or "auto" and store the result to it. 840# 841# test_tristate GIT_TEST_HTTPD 842# 843# A variable set to an empty string is set to 'false'. 844# A variable set to 'false' or 'auto' keeps its value. 845# Anything else is set to 'true'. 846# An unset variable defaults to 'auto'. 847# 848# The last rule is to allow people to set the variable to an empty 849# string and export it to decline testing the particular feature 850# for versions both before and after this change. We used to treat 851# both unset and empty variable as a signal for "do not test" and 852# took any non-empty string as "please test". 853 854test_tristate () { 855 if eval "test x\"\${$1+isset}\" = xisset" 856 then 857 # explicitly set 858 eval " 859 case \"\$$1\" in 860 '') $1=false ;; 861 auto) ;; 862 *) $1=\$(test_normalize_bool \$$1 || echo true) ;; 863 esac 864 " 865 else 866 eval "$1=auto" 867 fi 868} 869 870# Exit the test suite, either by skipping all remaining tests or by 871# exiting with an error. If "$1" is "auto", we then we assume we were 872# opportunistically trying to set up some tests and we skip. If it is 873# "true", then we report a failure. 874# 875# The error/skip message should be given by $2. 876# 877test_skip_or_die () { 878 case "$1" in 879 auto) 880 skip_all=$2 881 test_done 882 ;; 883 true) 884 error "$2" 885 ;; 886 *) 887 error "BUG: test tristate is '$1' (real error: $2)" 888 esac 889} 890 891# The following mingw_* functions obey POSIX shell syntax, but are actually 892# bash scripts, and are meant to be used only with bash on Windows. 893 894# A test_cmp function that treats LF and CRLF equal and avoids to fork 895# diff when possible. 896mingw_test_cmp () { 897 # Read text into shell variables and compare them. If the results 898 # are different, use regular diff to report the difference. 899 local test_cmp_a= test_cmp_b= 900 901 # When text came from stdin (one argument is '-') we must feed it 902 # to diff. 903 local stdin_for_diff= 904 905 # Since it is difficult to detect the difference between an 906 # empty input file and a failure to read the files, we go straight 907 # to diff if one of the inputs is empty. 908 if test -s "$1" && test -s "$2" 909 then 910 # regular case: both files non-empty 911 mingw_read_file_strip_cr_ test_cmp_a <"$1" 912 mingw_read_file_strip_cr_ test_cmp_b <"$2" 913 elif test -s "$1" && test "$2" = - 914 then 915 # read 2nd file from stdin 916 mingw_read_file_strip_cr_ test_cmp_a <"$1" 917 mingw_read_file_strip_cr_ test_cmp_b 918 stdin_for_diff='<<<"$test_cmp_b"' 919 elif test "$1" = - && test -s "$2" 920 then 921 # read 1st file from stdin 922 mingw_read_file_strip_cr_ test_cmp_a 923 mingw_read_file_strip_cr_ test_cmp_b <"$2" 924 stdin_for_diff='<<<"$test_cmp_a"' 925 fi 926 test -n "$test_cmp_a" && 927 test -n "$test_cmp_b" && 928 test "$test_cmp_a" = "$test_cmp_b" || 929 eval "diff -u \"\$@\" $stdin_for_diff" 930} 931 932# $1 is the name of the shell variable to fill in 933mingw_read_file_strip_cr_ () { 934 # Read line-wise using LF as the line separator 935 # and use IFS to strip CR. 936 local line 937 while : 938 do 939 if IFS=$'\r' read -r -d $'\n' line 940 then 941 # good 942 line=$line$'\n' 943 else 944 # we get here at EOF, but also if the last line 945 # was not terminated by LF; in the latter case, 946 # some text was read 947 if test -z "$line" 948 then 949 # EOF, really 950 break 951 fi 952 fi 953 eval "$1=\$$1\$line" 954 done 955} 956 957# Like "env FOO=BAR some-program", but run inside a subshell, which means 958# it also works for shell functions (though those functions cannot impact 959# the environment outside of the test_env invocation). 960test_env () { 961 ( 962 while test $# -gt 0 963 do 964 case "$1" in 965 *=*) 966 eval "${1%%=*}=\${1#*=}" 967 eval "export ${1%%=*}" 968 shift 969 ;; 970 *) 971 "$@" 972 exit 973 ;; 974 esac 975 done 976 ) 977} 978 979# Returns true if the numeric exit code in "$2" represents the expected signal 980# in "$1". Signals should be given numerically. 981test_match_signal () { 982 if test "$2" = "$((128 + $1))" 983 then 984 # POSIX 985 return 0 986 elif test "$2" = "$((256 + $1))" 987 then 988 # ksh 989 return 0 990 fi 991 return 1 992} 993 994# Read up to "$1" bytes (or to EOF) from stdin and write them to stdout. 995test_copy_bytes () { 996 perl -e ' 997 my $len = $ARGV[1]; 998 while ($len > 0) { 999 my $s;1000 my $nread = sysread(STDIN, $s, $len);1001 die "cannot read: $!" unless defined($nread);1002 print $s;1003 $len -= $nread;1004 }1005 ' - "$1"1006}10071008# run "$@" inside a non-git directory1009nongit () {1010 test -d non-repo ||1011 mkdir non-repo ||1012 return 110131014 (1015 GIT_CEILING_DIRECTORIES=$(pwd) &&1016 export GIT_CEILING_DIRECTORIES &&1017 cd non-repo &&1018 "$@"1019 )1020}