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 == 7) return "REVERSE"; 46 if (n == 30) return "BLACK"; 47 if (n == 31) return "RED"; 48 if (n == 32) return "GREEN"; 49 if (n == 33) return "YELLOW"; 50 if (n == 34) return "BLUE"; 51 if (n == 35) return "MAGENTA"; 52 if (n == 36) return "CYAN"; 53 if (n == 37) return "WHITE"; 54 if (n == 40) return "BLACK"; 55 if (n == 41) return "BRED"; 56 if (n == 42) return "BGREEN"; 57 if (n == 43) return "BYELLOW"; 58 if (n == 44) return "BBLUE"; 59 if (n == 45) return "BMAGENTA"; 60 if (n == 46) return "BCYAN"; 61 if (n == 47) return "BWHITE"; 62 } 63 { 64 while (match($0, /\033\[[0-9;]*m/) != 0) { 65 printf "%s<", substr($0, 1, RSTART-1); 66 codes = substr($0, RSTART+2, RLENGTH-3); 67 if (length(codes) == 0) 68 printf "%s", name(0) 69 else { 70 n = split(codes, ary, ";"); 71 sep = ""; 72 for (i = 1; i <= n; i++) { 73 printf "%s%s", sep, name(ary[i]); 74 sep = ";" 75 } 76 } 77 printf ">"; 78 $0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1); 79 } 80 print 81 } 82 ' 83} 84 85lf_to_nul () { 86 perl -pe 'y/\012/\000/' 87} 88 89nul_to_q () { 90 perl -pe 'y/\000/Q/' 91} 92 93q_to_nul () { 94 perl -pe 'y/Q/\000/' 95} 96 97q_to_cr () { 98 tr Q '\015' 99} 100 101q_to_tab () { 102 tr Q '\011' 103} 104 105qz_to_tab_space () { 106 tr QZ '\011\040' 107} 108 109append_cr () { 110 sed -e 's/$/Q/' | tr Q '\015' 111} 112 113remove_cr () { 114 tr '\015' Q | sed -e 's/Q$//' 115} 116 117# In some bourne shell implementations, the "unset" builtin returns 118# nonzero status when a variable to be unset was not set in the first 119# place. 120# 121# Use sane_unset when that should not be considered an error. 122 123sane_unset () { 124 unset "$@" 125 return 0 126} 127 128test_tick () { 129 if test -z "${test_tick+set}" 130 then 131 test_tick=1112911993 132 else 133 test_tick=$(($test_tick + 60)) 134 fi 135 GIT_COMMITTER_DATE="$test_tick -0700" 136 GIT_AUTHOR_DATE="$test_tick -0700" 137 export GIT_COMMITTER_DATE GIT_AUTHOR_DATE 138} 139 140# Stop execution and start a shell. This is useful for debugging tests. 141# 142# Be sure to remove all invocations of this command before submitting. 143 144test_pause () { 145 "$SHELL_PATH" <&6 >&5 2>&7 146} 147 148# Wrap git in gdb. Adding this to a command can make it easier to 149# understand what is going on in a failing test. 150# 151# Example: "debug git checkout master". 152debug () { 153 GIT_TEST_GDB=1 "$@" <&6 >&5 2>&7 154} 155 156# Call test_commit with the arguments 157# [-C <directory>] <message> [<file> [<contents> [<tag>]]]" 158# 159# This will commit a file with the given contents and the given commit 160# message, and tag the resulting commit with the given tag name. 161# 162# <file>, <contents>, and <tag> all default to <message>. 163# 164# If the first argument is "-C", the second argument is used as a path for 165# the git invocations. 166 167test_commit () { 168 notick= && 169 signoff= && 170 indir= && 171 while test $# != 0 172 do 173 case "$1" in 174 --notick) 175 notick=yes 176 ;; 177 --signoff) 178 signoff="$1" 179 ;; 180 -C) 181 indir="$2" 182 shift 183 ;; 184 *) 185 break 186 ;; 187 esac 188 shift 189 done && 190 indir=${indir:+"$indir"/} && 191 file=${2:-"$1.t"} && 192 echo "${3-$1}" > "$indir$file" && 193 git ${indir:+ -C "$indir"} add "$file" && 194 if test -z "$notick" 195 then 196 test_tick 197 fi && 198 git ${indir:+ -C "$indir"} commit $signoff -m "$1" && 199 git ${indir:+ -C "$indir"} tag "${4:-$1}" 200} 201 202# Call test_merge with the arguments "<message> <commit>", where <commit> 203# can be a tag pointing to the commit-to-merge. 204 205test_merge () { 206 test_tick && 207 git merge -m "$1" "$2" && 208 git tag "$1" 209} 210 211# This function helps systems where core.filemode=false is set. 212# Use it instead of plain 'chmod +x' to set or unset the executable bit 213# of a file in the working directory and add it to the index. 214 215test_chmod () { 216 chmod "$@" && 217 git update-index --add "--chmod=$@" 218} 219 220# Get the modebits from a file. 221test_modebits () { 222 ls -l "$1" | sed -e 's|^\(..........\).*|\1|' 223} 224 225# Unset a configuration variable, but don't fail if it doesn't exist. 226test_unconfig () { 227 config_dir= 228 if test "$1" = -C 229 then 230 shift 231 config_dir=$1 232 shift 233 fi 234 git ${config_dir:+-C "$config_dir"} config --unset-all "$@" 235 config_status=$? 236 case "$config_status" in 237 5) # ok, nothing to unset 238 config_status=0 239 ;; 240 esac 241 return $config_status 242} 243 244# Set git config, automatically unsetting it after the test is over. 245test_config () { 246 config_dir= 247 if test "$1" = -C 248 then 249 shift 250 config_dir=$1 251 shift 252 fi 253 test_when_finished "test_unconfig ${config_dir:+-C '$config_dir'} '$1'" && 254 git ${config_dir:+-C "$config_dir"} config "$@" 255} 256 257test_config_global () { 258 test_when_finished "test_unconfig --global '$1'" && 259 git config --global "$@" 260} 261 262write_script () { 263 { 264 echo "#!${2-"$SHELL_PATH"}" && 265 cat 266 } >"$1" && 267 chmod +x "$1" 268} 269 270# Use test_set_prereq to tell that a particular prerequisite is available. 271# The prerequisite can later be checked for in two ways: 272# 273# - Explicitly using test_have_prereq. 274# 275# - Implicitly by specifying the prerequisite tag in the calls to 276# test_expect_{success,failure,code}. 277# 278# The single parameter is the prerequisite tag (a simple word, in all 279# capital letters by convention). 280 281test_set_prereq () { 282 satisfied_prereq="$satisfied_prereq$1 " 283} 284satisfied_prereq=" " 285lazily_testable_prereq= lazily_tested_prereq= 286 287# Usage: test_lazy_prereq PREREQ 'script' 288test_lazy_prereq () { 289 lazily_testable_prereq="$lazily_testable_prereq$1 " 290 eval test_prereq_lazily_$1=\$2 291} 292 293test_run_lazy_prereq_ () { 294 script=' 295mkdir -p "$TRASH_DIRECTORY/prereq-test-dir" && 296( 297 cd "$TRASH_DIRECTORY/prereq-test-dir" &&'"$2"' 298)' 299 say >&3 "checking prerequisite: $1" 300 say >&3 "$script" 301 test_eval_ "$script" 302 eval_ret=$? 303 rm -rf "$TRASH_DIRECTORY/prereq-test-dir" 304 if test "$eval_ret" = 0; then 305 say >&3 "prerequisite $1 ok" 306 else 307 say >&3 "prerequisite $1 not satisfied" 308 fi 309 return $eval_ret 310} 311 312test_have_prereq () { 313 # prerequisites can be concatenated with ',' 314 save_IFS=$IFS 315 IFS=, 316 set -- $* 317 IFS=$save_IFS 318 319 total_prereq=0 320 ok_prereq=0 321 missing_prereq= 322 323 for prerequisite 324 do 325 case "$prerequisite" in 326 !*) 327 negative_prereq=t 328 prerequisite=${prerequisite#!} 329 ;; 330 *) 331 negative_prereq= 332 esac 333 334 case " $lazily_tested_prereq " in 335 *" $prerequisite "*) 336 ;; 337 *) 338 case " $lazily_testable_prereq " in 339 *" $prerequisite "*) 340 eval "script=\$test_prereq_lazily_$prerequisite" && 341 if test_run_lazy_prereq_ "$prerequisite" "$script" 342 then 343 test_set_prereq $prerequisite 344 fi 345 lazily_tested_prereq="$lazily_tested_prereq$prerequisite " 346 esac 347 ;; 348 esac 349 350 total_prereq=$(($total_prereq + 1)) 351 case "$satisfied_prereq" in 352 *" $prerequisite "*) 353 satisfied_this_prereq=t 354 ;; 355 *) 356 satisfied_this_prereq= 357 esac 358 359 case "$satisfied_this_prereq,$negative_prereq" in 360 t,|,t) 361 ok_prereq=$(($ok_prereq + 1)) 362 ;; 363 *) 364 # Keep a list of missing prerequisites; restore 365 # the negative marker if necessary. 366 prerequisite=${negative_prereq:+!}$prerequisite 367 if test -z "$missing_prereq" 368 then 369 missing_prereq=$prerequisite 370 else 371 missing_prereq="$prerequisite,$missing_prereq" 372 fi 373 esac 374 done 375 376 test $total_prereq = $ok_prereq 377} 378 379test_declared_prereq () { 380 case ",$test_prereq," in 381 *,$1,*) 382 return 0 383 ;; 384 esac 385 return 1 386} 387 388test_verify_prereq () { 389 test -z "$test_prereq" || 390 expr >/dev/null "$test_prereq" : '[A-Z0-9_,!]*$' || 391 error "bug in the test script: '$test_prereq' does not look like a prereq" 392} 393 394test_expect_failure () { 395 test_start_ 396 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 397 test "$#" = 2 || 398 error "bug in the test script: not 2 or 3 parameters to test-expect-failure" 399 test_verify_prereq 400 export test_prereq 401 if ! test_skip "$@" 402 then 403 say >&3 "checking known breakage: $2" 404 if test_run_ "$2" expecting_failure 405 then 406 test_known_broken_ok_ "$1" 407 else 408 test_known_broken_failure_ "$1" 409 fi 410 fi 411 test_finish_ 412} 413 414test_expect_success () { 415 test_start_ 416 test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq= 417 test "$#" = 2 || 418 error "bug in the test script: not 2 or 3 parameters to test-expect-success" 419 test_verify_prereq 420 export test_prereq 421 if ! test_skip "$@" 422 then 423 say >&3 "expecting success: $2" 424 if test_run_ "$2" 425 then 426 test_ok_ "$1" 427 else 428 test_failure_ "$@" 429 fi 430 fi 431 test_finish_ 432} 433 434# test_external runs external test scripts that provide continuous 435# test output about their progress, and succeeds/fails on 436# zero/non-zero exit code. It outputs the test output on stdout even 437# in non-verbose mode, and announces the external script with "# run 438# <n>: ..." before running it. When providing relative paths, keep in 439# mind that all scripts run in "trash directory". 440# Usage: test_external description command arguments... 441# Example: test_external 'Perl API' perl ../path/to/test.pl 442test_external () { 443 test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq= 444 test "$#" = 3 || 445 error >&5 "bug in the test script: not 3 or 4 parameters to test_external" 446 descr="$1" 447 shift 448 test_verify_prereq 449 export test_prereq 450 if ! test_skip "$descr" "$@" 451 then 452 # Announce the script to reduce confusion about the 453 # test output that follows. 454 say_color "" "# run $test_count: $descr ($*)" 455 # Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG 456 # to be able to use them in script 457 export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG 458 # Run command; redirect its stderr to &4 as in 459 # test_run_, but keep its stdout on our stdout even in 460 # non-verbose mode. 461 "$@" 2>&4 462 if test "$?" = 0 463 then 464 if test $test_external_has_tap -eq 0; then 465 test_ok_ "$descr" 466 else 467 say_color "" "# test_external test $descr was ok" 468 test_success=$(($test_success + 1)) 469 fi 470 else 471 if test $test_external_has_tap -eq 0; then 472 test_failure_ "$descr" "$@" 473 else 474 say_color error "# test_external test $descr failed: $@" 475 test_failure=$(($test_failure + 1)) 476 fi 477 fi 478 fi 479} 480 481# Like test_external, but in addition tests that the command generated 482# no output on stderr. 483test_external_without_stderr () { 484 # The temporary file has no (and must have no) security 485 # implications. 486 tmp=${TMPDIR:-/tmp} 487 stderr="$tmp/git-external-stderr.$$.tmp" 488 test_external "$@" 4> "$stderr" 489 test -f "$stderr" || error "Internal error: $stderr disappeared." 490 descr="no stderr: $1" 491 shift 492 say >&3 "# expecting no stderr from previous command" 493 if test ! -s "$stderr" 494 then 495 rm "$stderr" 496 497 if test $test_external_has_tap -eq 0; then 498 test_ok_ "$descr" 499 else 500 say_color "" "# test_external_without_stderr test $descr was ok" 501 test_success=$(($test_success + 1)) 502 fi 503 else 504 if test "$verbose" = t 505 then 506 output=$(echo; echo "# Stderr is:"; cat "$stderr") 507 else 508 output= 509 fi 510 # rm first in case test_failure exits. 511 rm "$stderr" 512 if test $test_external_has_tap -eq 0; then 513 test_failure_ "$descr" "$@" "$output" 514 else 515 say_color error "# test_external_without_stderr test $descr failed: $@: $output" 516 test_failure=$(($test_failure + 1)) 517 fi 518 fi 519} 520 521# debugging-friendly alternatives to "test [-f|-d|-e]" 522# The commands test the existence or non-existence of $1. $2 can be 523# given to provide a more precise diagnosis. 524test_path_is_file () { 525 if ! test -f "$1" 526 then 527 echo "File $1 doesn't exist. $2" 528 false 529 fi 530} 531 532test_path_is_dir () { 533 if ! test -d "$1" 534 then 535 echo "Directory $1 doesn't exist. $2" 536 false 537 fi 538} 539 540# Check if the directory exists and is empty as expected, barf otherwise. 541test_dir_is_empty () { 542 test_path_is_dir "$1" && 543 if test -n "$(ls -a1 "$1" | egrep -v '^\.\.?$')" 544 then 545 echo "Directory '$1' is not empty, it contains:" 546 ls -la "$1" 547 return 1 548 fi 549} 550 551test_path_is_missing () { 552 if test -e "$1" 553 then 554 echo "Path exists:" 555 ls -ld "$1" 556 if test $# -ge 1 557 then 558 echo "$*" 559 fi 560 false 561 fi 562} 563 564# test_line_count checks that a file has the number of lines it 565# ought to. For example: 566# 567# test_expect_success 'produce exactly one line of output' ' 568# do something >output && 569# test_line_count = 1 output 570# ' 571# 572# is like "test $(wc -l <output) = 1" except that it passes the 573# output through when the number of lines is wrong. 574 575test_line_count () { 576 if test $# != 3 577 then 578 error "bug in the test script: not 3 parameters to test_line_count" 579 elif ! test $(wc -l <"$3") "$1" "$2" 580 then 581 echo "test_line_count: line count for $3 !$1 $2" 582 cat "$3" 583 return 1 584 fi 585} 586 587# Returns success if a comma separated string of keywords ($1) contains a 588# given keyword ($2). 589# Examples: 590# `list_contains "foo,bar" bar` returns 0 591# `list_contains "foo" bar` returns 1 592 593list_contains () { 594 case ",$1," in 595 *,$2,*) 596 return 0 597 ;; 598 esac 599 return 1 600} 601 602# This is not among top-level (test_expect_success | test_expect_failure) 603# but is a prefix that can be used in the test script, like: 604# 605# test_expect_success 'complain and die' ' 606# do something && 607# do something else && 608# test_must_fail git checkout ../outerspace 609# ' 610# 611# Writing this as "! git checkout ../outerspace" is wrong, because 612# the failure could be due to a segv. We want a controlled failure. 613 614test_must_fail () { 615 case "$1" in 616 ok=*) 617 _test_ok=${1#ok=} 618 shift 619 ;; 620 *) 621 _test_ok= 622 ;; 623 esac 624 "$@" 625 exit_code=$? 626 if test $exit_code -eq 0 && ! list_contains "$_test_ok" success 627 then 628 echo >&2 "test_must_fail: command succeeded: $*" 629 return 1 630 elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe 631 then 632 return 0 633 elif test $exit_code -gt 129 && test $exit_code -le 192 634 then 635 echo >&2 "test_must_fail: died by signal $(($exit_code - 128)): $*" 636 return 1 637 elif test $exit_code -eq 127 638 then 639 echo >&2 "test_must_fail: command not found: $*" 640 return 1 641 elif test $exit_code -eq 126 642 then 643 echo >&2 "test_must_fail: valgrind error: $*" 644 return 1 645 fi 646 return 0 647} 648 649# Similar to test_must_fail, but tolerates success, too. This is 650# meant to be used in contexts like: 651# 652# test_expect_success 'some command works without configuration' ' 653# test_might_fail git config --unset all.configuration && 654# do something 655# ' 656# 657# Writing "git config --unset all.configuration || :" would be wrong, 658# because we want to notice if it fails due to segv. 659 660test_might_fail () { 661 test_must_fail ok=success "$@" 662} 663 664# Similar to test_must_fail and test_might_fail, but check that a 665# given command exited with a given exit code. Meant to be used as: 666# 667# test_expect_success 'Merge with d/f conflicts' ' 668# test_expect_code 1 git merge "merge msg" B master 669# ' 670 671test_expect_code () { 672 want_code=$1 673 shift 674 "$@" 675 exit_code=$? 676 if test $exit_code = $want_code 677 then 678 return 0 679 fi 680 681 echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*" 682 return 1 683} 684 685# test_cmp is a helper function to compare actual and expected output. 686# You can use it like: 687# 688# test_expect_success 'foo works' ' 689# echo expected >expected && 690# foo >actual && 691# test_cmp expected actual 692# ' 693# 694# This could be written as either "cmp" or "diff -u", but: 695# - cmp's output is not nearly as easy to read as diff -u 696# - not all diff versions understand "-u" 697 698test_cmp() { 699 $GIT_TEST_CMP "$@" 700} 701 702# test_cmp_bin - helper to compare binary files 703 704test_cmp_bin() { 705 cmp "$@" 706} 707 708# Call any command "$@" but be more verbose about its 709# failure. This is handy for commands like "test" which do 710# not output anything when they fail. 711verbose () { 712 "$@" && return 0 713 echo >&2 "command failed: $(git rev-parse --sq-quote "$@")" 714 return 1 715} 716 717# Check if the file expected to be empty is indeed empty, and barfs 718# otherwise. 719 720test_must_be_empty () { 721 if test -s "$1" 722 then 723 echo "'$1' is not empty, it contains:" 724 cat "$1" 725 return 1 726 fi 727} 728 729# Tests that its two parameters refer to the same revision 730test_cmp_rev () { 731 git rev-parse --verify "$1" >expect.rev && 732 git rev-parse --verify "$2" >actual.rev && 733 test_cmp expect.rev actual.rev 734} 735 736# Print a sequence of integers in increasing order, either with 737# two arguments (start and end): 738# 739# test_seq 1 5 -- outputs 1 2 3 4 5 one line at a time 740# 741# or with one argument (end), in which case it starts counting 742# from 1. 743 744test_seq () { 745 case $# in 746 1) set 1 "$@" ;; 747 2) ;; 748 *) error "bug in the test script: not 1 or 2 parameters to test_seq" ;; 749 esac 750 test_seq_counter__=$1 751 while test "$test_seq_counter__" -le "$2" 752 do 753 echo "$test_seq_counter__" 754 test_seq_counter__=$(( $test_seq_counter__ + 1 )) 755 done 756} 757 758# This function can be used to schedule some commands to be run 759# unconditionally at the end of the test to restore sanity: 760# 761# test_expect_success 'test core.capslock' ' 762# git config core.capslock true && 763# test_when_finished "git config --unset core.capslock" && 764# hello world 765# ' 766# 767# That would be roughly equivalent to 768# 769# test_expect_success 'test core.capslock' ' 770# git config core.capslock true && 771# hello world 772# git config --unset core.capslock 773# ' 774# 775# except that the greeting and config --unset must both succeed for 776# the test to pass. 777# 778# Note that under --immediate mode, no clean-up is done to help diagnose 779# what went wrong. 780 781test_when_finished () { 782 # We cannot detect when we are in a subshell in general, but by 783 # doing so on Bash is better than nothing (the test will 784 # silently pass on other shells). 785 test "${BASH_SUBSHELL-0}" = 0 || 786 error "bug in test script: test_when_finished does nothing in a subshell" 787 test_cleanup="{ $* 788 } && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup" 789} 790 791# Most tests can use the created repository, but some may need to create more. 792# Usage: test_create_repo <directory> 793test_create_repo () { 794 test "$#" = 1 || 795 error "bug in the test script: not 1 parameter to test-create-repo" 796 repo="$1" 797 mkdir -p "$repo" 798 ( 799 cd "$repo" || error "Cannot setup test environment" 800 "$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 || 801 error "cannot run git init -- have you built things yet?" 802 mv .git/hooks .git/hooks-disabled 803 ) || exit 804} 805 806# This function helps on symlink challenged file systems when it is not 807# important that the file system entry is a symbolic link. 808# Use test_ln_s_add instead of "ln -s x y && git add y" to add a 809# symbolic link entry y to the index. 810 811test_ln_s_add () { 812 if test_have_prereq SYMLINKS 813 then 814 ln -s "$1" "$2" && 815 git update-index --add "$2" 816 else 817 printf '%s' "$1" >"$2" && 818 ln_s_obj=$(git hash-object -w "$2") && 819 git update-index --add --cacheinfo 120000 $ln_s_obj "$2" && 820 # pick up stat info from the file 821 git update-index "$2" 822 fi 823} 824 825# This function writes out its parameters, one per line 826test_write_lines () { 827 printf "%s\n" "$@" 828} 829 830perl () { 831 command "$PERL_PATH" "$@" 832} 833 834# Is the value one of the various ways to spell a boolean true/false? 835test_normalize_bool () { 836 git -c magic.variable="$1" config --bool magic.variable 2>/dev/null 837} 838 839# Given a variable $1, normalize the value of it to one of "true", 840# "false", or "auto" and store the result to it. 841# 842# test_tristate GIT_TEST_HTTPD 843# 844# A variable set to an empty string is set to 'false'. 845# A variable set to 'false' or 'auto' keeps its value. 846# Anything else is set to 'true'. 847# An unset variable defaults to 'auto'. 848# 849# The last rule is to allow people to set the variable to an empty 850# string and export it to decline testing the particular feature 851# for versions both before and after this change. We used to treat 852# both unset and empty variable as a signal for "do not test" and 853# took any non-empty string as "please test". 854 855test_tristate () { 856 if eval "test x\"\${$1+isset}\" = xisset" 857 then 858 # explicitly set 859 eval " 860 case \"\$$1\" in 861 '') $1=false ;; 862 auto) ;; 863 *) $1=\$(test_normalize_bool \$$1 || echo true) ;; 864 esac 865 " 866 else 867 eval "$1=auto" 868 fi 869} 870 871# Exit the test suite, either by skipping all remaining tests or by 872# exiting with an error. If "$1" is "auto", we then we assume we were 873# opportunistically trying to set up some tests and we skip. If it is 874# "true", then we report a failure. 875# 876# The error/skip message should be given by $2. 877# 878test_skip_or_die () { 879 case "$1" in 880 auto) 881 skip_all=$2 882 test_done 883 ;; 884 true) 885 error "$2" 886 ;; 887 *) 888 error "BUG: test tristate is '$1' (real error: $2)" 889 esac 890} 891 892# The following mingw_* functions obey POSIX shell syntax, but are actually 893# bash scripts, and are meant to be used only with bash on Windows. 894 895# A test_cmp function that treats LF and CRLF equal and avoids to fork 896# diff when possible. 897mingw_test_cmp () { 898 # Read text into shell variables and compare them. If the results 899 # are different, use regular diff to report the difference. 900 local test_cmp_a= test_cmp_b= 901 902 # When text came from stdin (one argument is '-') we must feed it 903 # to diff. 904 local stdin_for_diff= 905 906 # Since it is difficult to detect the difference between an 907 # empty input file and a failure to read the files, we go straight 908 # to diff if one of the inputs is empty. 909 if test -s "$1" && test -s "$2" 910 then 911 # regular case: both files non-empty 912 mingw_read_file_strip_cr_ test_cmp_a <"$1" 913 mingw_read_file_strip_cr_ test_cmp_b <"$2" 914 elif test -s "$1" && test "$2" = - 915 then 916 # read 2nd file from stdin 917 mingw_read_file_strip_cr_ test_cmp_a <"$1" 918 mingw_read_file_strip_cr_ test_cmp_b 919 stdin_for_diff='<<<"$test_cmp_b"' 920 elif test "$1" = - && test -s "$2" 921 then 922 # read 1st file from stdin 923 mingw_read_file_strip_cr_ test_cmp_a 924 mingw_read_file_strip_cr_ test_cmp_b <"$2" 925 stdin_for_diff='<<<"$test_cmp_a"' 926 fi 927 test -n "$test_cmp_a" && 928 test -n "$test_cmp_b" && 929 test "$test_cmp_a" = "$test_cmp_b" || 930 eval "diff -u \"\$@\" $stdin_for_diff" 931} 932 933# $1 is the name of the shell variable to fill in 934mingw_read_file_strip_cr_ () { 935 # Read line-wise using LF as the line separator 936 # and use IFS to strip CR. 937 local line 938 while : 939 do 940 if IFS=$'\r' read -r -d $'\n' line 941 then 942 # good 943 line=$line$'\n' 944 else 945 # we get here at EOF, but also if the last line 946 # was not terminated by LF; in the latter case, 947 # some text was read 948 if test -z "$line" 949 then 950 # EOF, really 951 break 952 fi 953 fi 954 eval "$1=\$$1\$line" 955 done 956} 957 958# Like "env FOO=BAR some-program", but run inside a subshell, which means 959# it also works for shell functions (though those functions cannot impact 960# the environment outside of the test_env invocation). 961test_env () { 962 ( 963 while test $# -gt 0 964 do 965 case "$1" in 966 *=*) 967 eval "${1%%=*}=\${1#*=}" 968 eval "export ${1%%=*}" 969 shift 970 ;; 971 *) 972 "$@" 973 exit 974 ;; 975 esac 976 done 977 ) 978} 979 980# Returns true if the numeric exit code in "$2" represents the expected signal 981# in "$1". Signals should be given numerically. 982test_match_signal () { 983 if test "$2" = "$((128 + $1))" 984 then 985 # POSIX 986 return 0 987 elif test "$2" = "$((256 + $1))" 988 then 989 # ksh 990 return 0 991 fi 992 return 1 993} 994 995# Read up to "$1" bytes (or to EOF) from stdin and write them to stdout. 996test_copy_bytes () { 997 perl -e ' 998 my $len = $ARGV[1]; 999 while ($len > 0) {1000 my $s;1001 my $nread = sysread(STDIN, $s, $len);1002 die "cannot read: $!" unless defined($nread);1003 last unless $nread;1004 print $s;1005 $len -= $nread;1006 }1007 ' - "$1"1008}10091010# run "$@" inside a non-git directory1011nongit () {1012 test -d non-repo ||1013 mkdir non-repo ||1014 return 110151016 (1017 GIT_CEILING_DIRECTORIES=$(pwd) &&1018 export GIT_CEILING_DIRECTORIES &&1019 cd non-repo &&1020 "$@"1021 )1022}