Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1877 insertions, 0 deletions

diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
new file mode 100644
index 0000000..796093a
--- /dev/null
+++ b/t/test-lib-functions.sh
@@ -0,0 +1,1877 @@
+# Library of functions shared by all tests scripts, included by
+# test-lib.sh.
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see http://www.gnu.org/licenses/ .
+
+# The semantics of the editor variables are that of invoking
+# sh -c "$EDITOR \"$@\"" files ...
+#
+# If our trash directory contains shell metacharacters, they will be
+# interpreted if we just set $EDITOR directly, so do a little dance with
+# environment variables to work around this.
+#
+# In particular, quoting isn't enough, as the path may contain the same quote
+# that we're using.
+test_set_editor () {
+	FAKE_EDITOR="$1"
+	export FAKE_EDITOR
+	EDITOR='"$FAKE_EDITOR"'
+	export EDITOR
+}
+
+test_decode_color () {
+	awk '
+		function name(n) {
+			if (n == 0) return "RESET";
+			if (n == 1) return "BOLD";
+			if (n == 2) return "FAINT";
+			if (n == 3) return "ITALIC";
+			if (n == 7) return "REVERSE";
+			if (n == 30) return "BLACK";
+			if (n == 31) return "RED";
+			if (n == 32) return "GREEN";
+			if (n == 33) return "YELLOW";
+			if (n == 34) return "BLUE";
+			if (n == 35) return "MAGENTA";
+			if (n == 36) return "CYAN";
+			if (n == 37) return "WHITE";
+			if (n == 40) return "BLACK";
+			if (n == 41) return "BRED";
+			if (n == 42) return "BGREEN";
+			if (n == 43) return "BYELLOW";
+			if (n == 44) return "BBLUE";
+			if (n == 45) return "BMAGENTA";
+			if (n == 46) return "BCYAN";
+			if (n == 47) return "BWHITE";
+		}
+		{
+			while (match($0, /\033\[[0-9;]*m/) != 0) {
+				printf "%s<", substr($0, 1, RSTART-1);
+				codes = substr($0, RSTART+2, RLENGTH-3);
+				if (length(codes) == 0)
+					printf "%s", name(0)
+				else {
+					n = split(codes, ary, ";");
+					sep = "";
+					for (i = 1; i <= n; i++) {
+						printf "%s%s", sep, name(ary[i]);
+						sep = ";"
+					}
+				}
+				printf ">";
+				$0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1);
+			}
+			print
+		}
+	'
+}
+
+lf_to_nul () {
+	perl -pe 'y/\012/\000/'
+}
+
+nul_to_q () {
+	perl -pe 'y/\000/Q/'
+}
+
+q_to_nul () {
+	perl -pe 'y/Q/\000/'
+}
+
+q_to_cr () {
+	tr Q '\015'
+}
+
+q_to_tab () {
+	tr Q '\011'
+}
+
+qz_to_tab_space () {
+	tr QZ '\011\040'
+}
+
+append_cr () {
+	sed -e 's/$/Q/' | tr Q '\015'
+}
+
+remove_cr () {
+	tr '\015' Q | sed -e 's/Q$//'
+}
+
+# In some bourne shell implementations, the "unset" builtin returns
+# nonzero status when a variable to be unset was not set in the first
+# place.
+#
+# Use sane_unset when that should not be considered an error.
+
+sane_unset () {
+	unset "$@"
+	return 0
+}
+
+test_tick () {
+	if test -z "${test_tick+set}"
+	then
+		test_tick=1112911993
+	else
+		test_tick=$(($test_tick + 60))
+	fi
+	GIT_COMMITTER_DATE="$test_tick -0700"
+	GIT_AUTHOR_DATE="$test_tick -0700"
+	export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
+}
+
+# Stop execution and start a shell. This is useful for debugging tests.
+#
+# Be sure to remove all invocations of this command before submitting.
+# WARNING: the shell invoked by this helper does not have the same environment
+# as the one running the tests (shell variables and functions are not
+# available, and the options below further modify the environment). As such,
+# commands copied from a test script might behave differently than when
+# running the test.
+#
+# Usage: test_pause [options]
+#   -t
+#	Use your original TERM instead of test-lib.sh's "dumb".
+#	This usually restores color output in the invoked shell.
+#   -s
+#	Invoke $SHELL instead of $TEST_SHELL_PATH.
+#   -h
+#	Use your original HOME instead of test-lib.sh's "$TRASH_DIRECTORY".
+#	This allows you to use your regular shell environment and Git aliases.
+#	CAUTION: running commands copied from a test script into the paused shell
+#	might result in files in your HOME being overwritten.
+#   -a
+#	Shortcut for -t -s -h
+
+test_pause () {
+	PAUSE_TERM=$TERM &&
+	PAUSE_SHELL=$TEST_SHELL_PATH &&
+	PAUSE_HOME=$HOME &&
+	while test $# != 0
+	do
+		case "$1" in
+		-t)
+			PAUSE_TERM="$USER_TERM"
+			;;
+		-s)
+			PAUSE_SHELL="$SHELL"
+			;;
+		-h)
+			PAUSE_HOME="$USER_HOME"
+			;;
+		-a)
+			PAUSE_TERM="$USER_TERM"
+			PAUSE_SHELL="$SHELL"
+			PAUSE_HOME="$USER_HOME"
+			;;
+		*)
+			break
+			;;
+		esac
+		shift
+	done &&
+	TERM="$PAUSE_TERM" HOME="$PAUSE_HOME" "$PAUSE_SHELL" <&6 >&5 2>&7
+}
+
+# Wrap git with a debugger. Adding this to a command can make it easier
+# to understand what is going on in a failing test.
+#
+# Usage: debug [options] <git command>
+#   -d <debugger>
+#   --debugger=<debugger>
+#	Use <debugger> instead of GDB
+#   -t
+#	Use your original TERM instead of test-lib.sh's "dumb".
+#	This usually restores color output in the debugger.
+#	WARNING: the command being debugged might behave differently than when
+#	running the test.
+#
+# Examples:
+#     debug git checkout master
+#     debug --debugger=nemiver git $ARGS
+#     debug -d "valgrind --tool=memcheck --track-origins=yes" git $ARGS
+debug () {
+	GIT_DEBUGGER=1 &&
+	DEBUG_TERM=$TERM &&
+	while test $# != 0
+	do
+		case "$1" in
+		-t)
+			DEBUG_TERM="$USER_TERM"
+			;;
+		-d)
+			GIT_DEBUGGER="$2" &&
+			shift
+			;;
+		--debugger=*)
+			GIT_DEBUGGER="${1#*=}"
+			;;
+		*)
+			break
+			;;
+		esac
+		shift
+	done &&
+
+	dotfiles=".gdbinit .lldbinit"
+
+	for dotfile in $dotfiles
+	do
+		dotfile="$USER_HOME/$dotfile" &&
+		test -f "$dotfile" && cp "$dotfile" "$HOME" || :
+	done &&
+
+	TERM="$DEBUG_TERM" GIT_DEBUGGER="${GIT_DEBUGGER}" "$@" <&6 >&5 2>&7 &&
+
+	for dotfile in $dotfiles
+	do
+		rm -f "$HOME/$dotfile"
+	done
+}
+
+# Usage: test_commit [options] <message> [<file> [<contents> [<tag>]]]
+#   -C <dir>:
+#	Run all git commands in directory <dir>
+#   --notick
+#	Do not call test_tick before making a commit
+#   --append
+#	Use ">>" instead of ">" when writing "<contents>" to "<file>"
+#   --printf
+#       Use "printf" instead of "echo" when writing "<contents>" to
+#       "<file>", use this to write escape sequences such as "\0", a
+#       trailing "\n" won't be added automatically. This option
+#       supports nothing but the FORMAT of printf(1), i.e. no custom
+#       ARGUMENT(s).
+#   --signoff
+#	Invoke "git commit" with --signoff
+#   --author <author>
+#	Invoke "git commit" with --author <author>
+#   --no-tag
+#	Do not tag the resulting commit
+#   --annotate
+#	Create an annotated tag with "--annotate -m <message>". Calls
+#	test_tick between making the commit and tag, unless --notick
+#	is given.
+#
+# This will commit a file with the given contents and the given commit
+# message, and tag the resulting commit with the given tag name.
+#
+# <file>, <contents>, and <tag> all default to <message>.
+
+test_commit () {
+	local notick= &&
+	local echo=echo &&
+	local append= &&
+	local author= &&
+	local signoff= &&
+	local indir= &&
+	local tag=light &&
+	while test $# != 0
+	do
+		case "$1" in
+		--notick)
+			notick=yes
+			;;
+		--printf)
+			echo=printf
+			;;
+		--append)
+			append=yes
+			;;
+		--author)
+			author="$2"
+			shift
+			;;
+		--signoff)
+			signoff="$1"
+			;;
+		--date)
+			notick=yes
+			GIT_COMMITTER_DATE="$2"
+			GIT_AUTHOR_DATE="$2"
+			shift
+			;;
+		-C)
+			indir="$2"
+			shift
+			;;
+		--no-tag)
+			tag=none
+			;;
+		--annotate)
+			tag=annotate
+			;;
+		*)
+			break
+			;;
+		esac
+		shift
+	done &&
+	indir=${indir:+"$indir"/} &&
+	local file=${2:-"$1.t"} &&
+	if test -n "$append"
+	then
+		$echo "${3-$1}" >>"$indir$file"
+	else
+		$echo "${3-$1}" >"$indir$file"
+	fi &&
+	git ${indir:+ -C "$indir"} add -- "$file" &&
+	if test -z "$notick"
+	then
+		test_tick
+	fi &&
+	git ${indir:+ -C "$indir"} commit \
+	    ${author:+ --author "$author"} \
+	    $signoff -m "$1" &&
+	case "$tag" in
+	none)
+		;;
+	light)
+		git ${indir:+ -C "$indir"} tag "${4:-$1}"
+		;;
+	annotate)
+		if test -z "$notick"
+		then
+			test_tick
+		fi &&
+		git ${indir:+ -C "$indir"} tag -a -m "$1" "${4:-$1}"
+		;;
+	esac
+}
+
+# Call test_merge with the arguments "<message> <commit>", where <commit>
+# can be a tag pointing to the commit-to-merge.
+
+test_merge () {
+	label="$1" &&
+	shift &&
+	test_tick &&
+	git merge -m "$label" "$@" &&
+	git tag "$label"
+}
+
+# Efficiently create <nr> commits, each with a unique number (from 1 to <nr>
+# by default) in the commit message.
+#
+# Usage: test_commit_bulk [options] <nr>
+#   -C <dir>:
+#	Run all git commands in directory <dir>
+#   --ref=<n>:
+#	ref on which to create commits (default: HEAD)
+#   --start=<n>:
+#	number commit messages from <n> (default: 1)
+#   --message=<msg>:
+#	use <msg> as the commit mesasge (default: "commit %s")
+#   --filename=<fn>:
+#	modify <fn> in each commit (default: %s.t)
+#   --contents=<string>:
+#	place <string> in each file (default: "content %s")
+#   --id=<string>:
+#	shorthand to use <string> and %s in message, filename, and contents
+#
+# The message, filename, and contents strings are evaluated by printf, with the
+# first "%s" replaced by the current commit number. So you can do:
+#
+#   test_commit_bulk --filename=file --contents="modification %s"
+#
+# to have every commit touch the same file, but with unique content.
+#
+test_commit_bulk () {
+	tmpfile=.bulk-commit.input
+	indir=.
+	ref=HEAD
+	n=1
+	message='commit %s'
+	filename='%s.t'
+	contents='content %s'
+	while test $# -gt 0
+	do
+		case "$1" in
+		-C)
+			indir=$2
+			shift
+			;;
+		--ref=*)
+			ref=${1#--*=}
+			;;
+		--start=*)
+			n=${1#--*=}
+			;;
+		--message=*)
+			message=${1#--*=}
+			;;
+		--filename=*)
+			filename=${1#--*=}
+			;;
+		--contents=*)
+			contents=${1#--*=}
+			;;
+		--id=*)
+			message="${1#--*=} %s"
+			filename="${1#--*=}-%s.t"
+			contents="${1#--*=} %s"
+			;;
+		-*)
+			BUG "invalid test_commit_bulk option: $1"
+			;;
+		*)
+			break
+			;;
+		esac
+		shift
+	done
+	total=$1
+
+	add_from=
+	if git -C "$indir" rev-parse --quiet --verify "$ref"
+	then
+		add_from=t
+	fi
+
+	while test "$total" -gt 0
+	do
+		test_tick &&
+		echo "commit $ref"
+		printf 'author %s <%s> %s\n' \
+			"$GIT_AUTHOR_NAME" \
+			"$GIT_AUTHOR_EMAIL" \
+			"$GIT_AUTHOR_DATE"
+		printf 'committer %s <%s> %s\n' \
+			"$GIT_COMMITTER_NAME" \
+			"$GIT_COMMITTER_EMAIL" \
+			"$GIT_COMMITTER_DATE"
+		echo "data <<EOF"
+		printf "$message\n" $n
+		echo "EOF"
+		if test -n "$add_from"
+		then
+			echo "from $ref^0"
+			add_from=
+		fi
+		printf "M 644 inline $filename\n" $n
+		echo "data <<EOF"
+		printf "$contents\n" $n
+		echo "EOF"
+		echo
+		n=$((n + 1))
+		total=$((total - 1))
+	done >"$tmpfile"
+
+	git -C "$indir" \
+	    -c fastimport.unpacklimit=0 \
+	    fast-import <"$tmpfile" || return 1
+
+	# This will be left in place on failure, which may aid debugging.
+	rm -f "$tmpfile"
+
+	# If we updated HEAD, then be nice and update the index and working
+	# tree, too.
+	if test "$ref" = "HEAD"
+	then
+		git -C "$indir" checkout -f HEAD || return 1
+	fi
+
+}
+
+# This function helps systems where core.filemode=false is set.
+# Use it instead of plain 'chmod +x' to set or unset the executable bit
+# of a file in the working directory and add it to the index.
+
+test_chmod () {
+	chmod "$@" &&
+	git update-index --add "--chmod=$@"
+}
+
+# Get the modebits from a file or directory, ignoring the setgid bit (g+s).
+# This bit is inherited by subdirectories at their creation. So we remove it
+# from the returning string to prevent callers from having to worry about the
+# state of the bit in the test directory.
+#
+test_modebits () {
+	ls -ld "$1" | sed -e 's|^\(..........\).*|\1|' \
+			  -e 's|^\(......\)S|\1-|' -e 's|^\(......\)s|\1x|'
+}
+
+# Unset a configuration variable, but don't fail if it doesn't exist.
+test_unconfig () {
+	config_dir=
+	if test "$1" = -C
+	then
+		shift
+		config_dir=$1
+		shift
+	fi
+	git ${config_dir:+-C "$config_dir"} config --unset-all "$@"
+	config_status=$?
+	case "$config_status" in
+	5) # ok, nothing to unset
+		config_status=0
+		;;
+	esac
+	return $config_status
+}
+
+# Set git config, automatically unsetting it after the test is over.
+test_config () {
+	config_dir=
+	if test "$1" = -C
+	then
+		shift
+		config_dir=$1
+		shift
+	fi
+	test_when_finished "test_unconfig ${config_dir:+-C '$config_dir'} '$1'" &&
+	git ${config_dir:+-C "$config_dir"} config "$@"
+}
+
+test_config_global () {
+	test_when_finished "test_unconfig --global '$1'" &&
+	git config --global "$@"
+}
+
+write_script () {
+	{
+		echo "#!${2-"$SHELL_PATH"}" &&
+		cat
+	} >"$1" &&
+	chmod +x "$1"
+}
+
+# Usage: test_hook [options] <hook-name> <<-\EOF
+#
+#   -C <dir>:
+#	Run all git commands in directory <dir>
+#   --setup
+#	Setup a hook for subsequent tests, i.e. don't remove it in a
+#	"test_when_finished"
+#   --clobber
+#	Overwrite an existing <hook-name>, if it exists. Implies
+#	--setup (i.e. the "test_when_finished" is assumed to have been
+#	set up already).
+#    --disable
+#	Disable (chmod -x) an existing <hook-name>, which must exist.
+#    --remove
+#	Remove (rm -f) an existing <hook-name>, which must exist.
+test_hook () {
+	setup= &&
+	clobber= &&
+	disable= &&
+	remove= &&
+	indir= &&
+	while test $# != 0
+	do
+		case "$1" in
+		-C)
+			indir="$2" &&
+			shift
+			;;
+		--setup)
+			setup=t
+			;;
+		--clobber)
+			clobber=t
+			;;
+		--disable)
+			disable=t
+			;;
+		--remove)
+			remove=t
+			;;
+		-*)
+			BUG "invalid argument: $1"
+			;;
+		*)
+			break
+			;;
+		esac &&
+		shift
+	done &&
+
+	git_dir=$(git -C "$indir" rev-parse --absolute-git-dir) &&
+	hook_dir="$git_dir/hooks" &&
+	hook_file="$hook_dir/$1" &&
+	if test -n "$disable$remove"
+	then
+		test_path_is_file "$hook_file" &&
+		if test -n "$disable"
+		then
+			chmod -x "$hook_file"
+		elif test -n "$remove"
+		then
+			rm -f "$hook_file"
+		fi &&
+		return 0
+	fi &&
+	if test -z "$clobber"
+	then
+		test_path_is_missing "$hook_file"
+	fi &&
+	if test -z "$setup$clobber"
+	then
+		test_when_finished "rm \"$hook_file\""
+	fi &&
+	write_script "$hook_file"
+}
+
+# Use test_set_prereq to tell that a particular prerequisite is available.
+# The prerequisite can later be checked for in two ways:
+#
+# - Explicitly using test_have_prereq.
+#
+# - Implicitly by specifying the prerequisite tag in the calls to
+#   test_expect_{success,failure}
+#
+# The single parameter is the prerequisite tag (a simple word, in all
+# capital letters by convention).
+
+test_unset_prereq () {
+	! test_have_prereq "$1" ||
+	satisfied_prereq="${satisfied_prereq% $1 *} ${satisfied_prereq#* $1 }"
+}
+
+test_set_prereq () {
+	if test -n "$GIT_TEST_FAIL_PREREQS_INTERNAL"
+	then
+		case "$1" in
+		# The "!" case is handled below with
+		# test_unset_prereq()
+		!*)
+			;;
+		# List of things we can't easily pretend to not support
+		SYMLINKS)
+			;;
+		# Inspecting whether GIT_TEST_FAIL_PREREQS is on
+		# should be unaffected.
+		FAIL_PREREQS)
+			;;
+		*)
+			return
+		esac
+	fi
+
+	case "$1" in
+	!*)
+		test_unset_prereq "${1#!}"
+		;;
+	*)
+		satisfied_prereq="$satisfied_prereq$1 "
+		;;
+	esac
+}
+satisfied_prereq=" "
+lazily_testable_prereq= lazily_tested_prereq=
+
+# Usage: test_lazy_prereq PREREQ 'script'
+test_lazy_prereq () {
+	lazily_testable_prereq="$lazily_testable_prereq$1 "
+	eval test_prereq_lazily_$1=\$2
+}
+
+test_run_lazy_prereq_ () {
+	script='
+mkdir -p "$TRASH_DIRECTORY/prereq-test-dir-'"$1"'" &&
+(
+	cd "$TRASH_DIRECTORY/prereq-test-dir-'"$1"'" &&'"$2"'
+)'
+	say >&3 "checking prerequisite: $1"
+	say >&3 "$script"
+	test_eval_ "$script"
+	eval_ret=$?
+	rm -rf "$TRASH_DIRECTORY/prereq-test-dir-$1"
+	if test "$eval_ret" = 0; then
+		say >&3 "prerequisite $1 ok"
+	else
+		say >&3 "prerequisite $1 not satisfied"
+	fi
+	return $eval_ret
+}
+
+test_have_prereq () {
+	# prerequisites can be concatenated with ','
+	save_IFS=$IFS
+	IFS=,
+	set -- $*
+	IFS=$save_IFS
+
+	total_prereq=0
+	ok_prereq=0
+	missing_prereq=
+
+	for prerequisite
+	do
+		case "$prerequisite" in
+		!*)
+			negative_prereq=t
+			prerequisite=${prerequisite#!}
+			;;
+		*)
+			negative_prereq=
+		esac
+
+		case " $lazily_tested_prereq " in
+		*" $prerequisite "*)
+			;;
+		*)
+			case " $lazily_testable_prereq " in
+			*" $prerequisite "*)
+				eval "script=\$test_prereq_lazily_$prerequisite" &&
+				if test_run_lazy_prereq_ "$prerequisite" "$script"
+				then
+					test_set_prereq $prerequisite
+				fi
+				lazily_tested_prereq="$lazily_tested_prereq$prerequisite "
+			esac
+			;;
+		esac
+
+		total_prereq=$(($total_prereq + 1))
+		case "$satisfied_prereq" in
+		*" $prerequisite "*)
+			satisfied_this_prereq=t
+			;;
+		*)
+			satisfied_this_prereq=
+		esac
+
+		case "$satisfied_this_prereq,$negative_prereq" in
+		t,|,t)
+			ok_prereq=$(($ok_prereq + 1))
+			;;
+		*)
+			# Keep a list of missing prerequisites; restore
+			# the negative marker if necessary.
+			prerequisite=${negative_prereq:+!}$prerequisite
+
+			# Abort if this prereq was marked as required
+			if test -n "$GIT_TEST_REQUIRE_PREREQ"
+			then
+				case " $GIT_TEST_REQUIRE_PREREQ " in
+				*" $prerequisite "*)
+					BAIL_OUT "required prereq $prerequisite failed"
+					;;
+				esac
+			fi
+
+			if test -z "$missing_prereq"
+			then
+				missing_prereq=$prerequisite
+			else
+				missing_prereq="$prerequisite,$missing_prereq"
+			fi
+		esac
+	done
+
+	test $total_prereq = $ok_prereq
+}
+
+test_declared_prereq () {
+	case ",$test_prereq," in
+	*,$1,*)
+		return 0
+		;;
+	esac
+	return 1
+}
+
+test_verify_prereq () {
+	test -z "$test_prereq" ||
+	expr >/dev/null "$test_prereq" : '[A-Z0-9_,!]*$' ||
+	BUG "'$test_prereq' does not look like a prereq"
+}
+
+test_expect_failure () {
+	test_start_ "$@"
+	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
+	test "$#" = 2 ||
+	BUG "not 2 or 3 parameters to test-expect-failure"
+	test_verify_prereq
+	export test_prereq
+	if ! test_skip "$@"
+	then
+		test -n "$test_skip_test_preamble" ||
+		say >&3 "checking known breakage of $TEST_NUMBER.$test_count '$1': $2"
+		if test_run_ "$2" expecting_failure
+		then
+			test_known_broken_ok_ "$1"
+		else
+			test_known_broken_failure_ "$1"
+		fi
+	fi
+	test_finish_
+}
+
+test_expect_success () {
+	test_start_ "$@"
+	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
+	test "$#" = 2 ||
+	BUG "not 2 or 3 parameters to test-expect-success"
+	test_verify_prereq
+	export test_prereq
+	if ! test_skip "$@"
+	then
+		test -n "$test_skip_test_preamble" ||
+		say >&3 "expecting success of $TEST_NUMBER.$test_count '$1': $2"
+		if test_run_ "$2"
+		then
+			test_ok_ "$1"
+		else
+			test_failure_ "$@"
+		fi
+	fi
+	test_finish_
+}
+
+# debugging-friendly alternatives to "test [-f|-d|-e]"
+# The commands test the existence or non-existence of $1
+test_path_is_file () {
+	test "$#" -ne 1 && BUG "1 param"
+	if ! test -f "$1"
+	then
+		echo "File $1 doesn't exist"
+		false
+	fi
+}
+
+test_path_is_file_not_symlink () {
+	test "$#" -ne 1 && BUG "1 param"
+	test_path_is_file "$1" &&
+	if test -h "$1"
+	then
+		echo "$1 shouldn't be a symbolic link"
+		false
+	fi
+}
+
+test_path_is_dir () {
+	test "$#" -ne 1 && BUG "1 param"
+	if ! test -d "$1"
+	then
+		echo "Directory $1 doesn't exist"
+		false
+	fi
+}
+
+test_path_is_dir_not_symlink () {
+	test "$#" -ne 1 && BUG "1 param"
+	test_path_is_dir "$1" &&
+	if test -h "$1"
+	then
+		echo "$1 shouldn't be a symbolic link"
+		false
+	fi
+}
+
+test_path_exists () {
+	test "$#" -ne 1 && BUG "1 param"
+	if ! test -e "$1"
+	then
+		echo "Path $1 doesn't exist"
+		false
+	fi
+}
+
+test_path_is_symlink () {
+	test "$#" -ne 1 && BUG "1 param"
+	if ! test -h "$1"
+	then
+		echo "Symbolic link $1 doesn't exist"
+		false
+	fi
+}
+
+# Check if the directory exists and is empty as expected, barf otherwise.
+test_dir_is_empty () {
+	test "$#" -ne 1 && BUG "1 param"
+	test_path_is_dir "$1" &&
+	if test -n "$(ls -a1 "$1" | grep -E -v '^\.\.?$')"
+	then
+		echo "Directory '$1' is not empty, it contains:"
+		ls -la "$1"
+		return 1
+	fi
+}
+
+# Check if the file exists and has a size greater than zero
+test_file_not_empty () {
+	test "$#" = 2 && BUG "2 param"
+	if ! test -s "$1"
+	then
+		echo "'$1' is not a non-empty file."
+		false
+	fi
+}
+
+test_path_is_missing () {
+	test "$#" -ne 1 && BUG "1 param"
+	if test -e "$1"
+	then
+		echo "Path exists:"
+		ls -ld "$1"
+		false
+	fi
+}
+
+# test_line_count checks that a file has the number of lines it
+# ought to. For example:
+#
+#	test_expect_success 'produce exactly one line of output' '
+#		do something >output &&
+#		test_line_count = 1 output
+#	'
+#
+# is like "test $(wc -l <output) = 1" except that it passes the
+# output through when the number of lines is wrong.
+
+test_line_count () {
+	if test $# != 3
+	then
+		BUG "not 3 parameters to test_line_count"
+	elif ! test $(wc -l <"$3") "$1" "$2"
+	then
+		echo "test_line_count: line count for $3 !$1 $2"
+		cat "$3"
+		return 1
+	fi
+}
+
+# SYNOPSIS:
+# 	test_stdout_line_count <bin-ops> <value> <cmd> [<args>...]
+#
+# test_stdout_line_count checks that the output of a command has the number
+# of lines it ought to. For example:
+#
+# test_stdout_line_count = 3 git ls-files -u
+# test_stdout_line_count -gt 10 ls
+test_stdout_line_count () {
+	local ops val trashdir &&
+	if test "$#" -le 3
+	then
+		BUG "expect 3 or more arguments"
+	fi &&
+	ops="$1" &&
+	val="$2" &&
+	shift 2 &&
+	if ! trashdir="$(git rev-parse --git-dir)/trash"; then
+		BUG "expect to be run inside a worktree"
+	fi &&
+	mkdir -p "$trashdir" &&
+	"$@" >"$trashdir/output" &&
+	test_line_count "$ops" "$val" "$trashdir/output"
+}
+
+
+test_file_size () {
+	test "$#" -ne 1 && BUG "1 param"
+	test-tool path-utils file-size "$1"
+}
+
+# Returns success if a comma separated string of keywords ($1) contains a
+# given keyword ($2).
+# Examples:
+# `list_contains "foo,bar" bar` returns 0
+# `list_contains "foo" bar` returns 1
+
+list_contains () {
+	case ",$1," in
+	*,$2,*)
+		return 0
+		;;
+	esac
+	return 1
+}
+
+# Returns success if the arguments indicate that a command should be
+# accepted by test_must_fail(). If the command is run with env, the env
+# and its corresponding variable settings will be stripped before we
+# test the command being run.
+test_must_fail_acceptable () {
+	if test "$1" = "env"
+	then
+		shift
+		while test $# -gt 0
+		do
+			case "$1" in
+			*?=*)
+				shift
+				;;
+			*)
+				break
+				;;
+			esac
+		done
+	fi
+
+	case "$1" in
+	git|__git*|test-tool|test_terminal)
+		return 0
+		;;
+	*)
+		return 1
+		;;
+	esac
+}
+
+# This is not among top-level (test_expect_success | test_expect_failure)
+# but is a prefix that can be used in the test script, like:
+#
+#	test_expect_success 'complain and die' '
+#           do something &&
+#           do something else &&
+#	    test_must_fail git checkout ../outerspace
+#	'
+#
+# Writing this as "! git checkout ../outerspace" is wrong, because
+# the failure could be due to a segv.  We want a controlled failure.
+#
+# Accepts the following options:
+#
+#   ok=<signal-name>[,<...>]:
+#     Don't treat an exit caused by the given signal as error.
+#     Multiple signals can be specified as a comma separated list.
+#     Currently recognized signal names are: sigpipe, success.
+#     (Don't use 'success', use 'test_might_fail' instead.)
+#
+# Do not use this to run anything but "git" and other specific testable
+# commands (see test_must_fail_acceptable()).  We are not in the
+# business of vetting system supplied commands -- in other words, this
+# is wrong:
+#
+#    test_must_fail grep pattern output
+#
+# Instead use '!':
+#
+#    ! grep pattern output
+
+test_must_fail () {
+	case "$1" in
+	ok=*)
+		_test_ok=${1#ok=}
+		shift
+		;;
+	*)
+		_test_ok=
+		;;
+	esac
+	if ! test_must_fail_acceptable "$@"
+	then
+		echo >&7 "test_must_fail: only 'git' is allowed: $*"
+		return 1
+	fi
+	"$@" 2>&7
+	exit_code=$?
+	if test $exit_code -eq 0 && ! list_contains "$_test_ok" success
+	then
+		echo >&4 "test_must_fail: command succeeded: $*"
+		return 1
+	elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe
+	then
+		return 0
+	elif test $exit_code -gt 129 && test $exit_code -le 192
+	then
+		echo >&4 "test_must_fail: died by signal $(($exit_code - 128)): $*"
+		return 1
+	elif test $exit_code -eq 127
+	then
+		echo >&4 "test_must_fail: command not found: $*"
+		return 1
+	elif test $exit_code -eq 126
+	then
+		echo >&4 "test_must_fail: valgrind error: $*"
+		return 1
+	fi
+	return 0
+} 7>&2 2>&4
+
+# Similar to test_must_fail, but tolerates success, too.  This is
+# meant to be used in contexts like:
+#
+#	test_expect_success 'some command works without configuration' '
+#		test_might_fail git config --unset all.configuration &&
+#		do something
+#	'
+#
+# Writing "git config --unset all.configuration || :" would be wrong,
+# because we want to notice if it fails due to segv.
+#
+# Accepts the same options as test_must_fail.
+
+test_might_fail () {
+	test_must_fail ok=success "$@" 2>&7
+} 7>&2 2>&4
+
+# Similar to test_must_fail and test_might_fail, but check that a
+# given command exited with a given exit code. Meant to be used as:
+#
+#	test_expect_success 'Merge with d/f conflicts' '
+#		test_expect_code 1 git merge "merge msg" B master
+#	'
+
+test_expect_code () {
+	want_code=$1
+	shift
+	"$@" 2>&7
+	exit_code=$?
+	if test $exit_code = $want_code
+	then
+		return 0
+	fi
+
+	echo >&4 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
+	return 1
+} 7>&2 2>&4
+
+# test_cmp is a helper function to compare actual and expected output.
+# You can use it like:
+#
+#	test_expect_success 'foo works' '
+#		echo expected >expected &&
+#		foo >actual &&
+#		test_cmp expected actual
+#	'
+#
+# This could be written as either "cmp" or "diff -u", but:
+# - cmp's output is not nearly as easy to read as diff -u
+# - not all diff versions understand "-u"
+
+test_cmp () {
+	test "$#" -ne 2 && BUG "2 param"
+	eval "$GIT_TEST_CMP" '"$@"'
+}
+
+# Check that the given config key has the expected value.
+#
+#    test_cmp_config [-C <dir>] <expected-value>
+#                    [<git-config-options>...] <config-key>
+#
+# for example to check that the value of core.bar is foo
+#
+#    test_cmp_config foo core.bar
+#
+test_cmp_config () {
+	local GD &&
+	if test "$1" = "-C"
+	then
+		shift &&
+		GD="-C $1" &&
+		shift
+	fi &&
+	printf "%s\n" "$1" >expect.config &&
+	shift &&
+	git $GD config "$@" >actual.config &&
+	test_cmp expect.config actual.config
+}
+
+# test_cmp_bin - helper to compare binary files
+
+test_cmp_bin () {
+	test "$#" -ne 2 && BUG "2 param"
+	cmp "$@"
+}
+
+# Wrapper for grep which used to be used for
+# GIT_TEST_GETTEXT_POISON=false. Only here as a shim for other
+# in-flight changes. Should not be used and will be removed soon.
+test_i18ngrep () {
+	eval "last_arg=\${$#}"
+
+	test -f "$last_arg" ||
+	BUG "test_i18ngrep requires a file to read as the last parameter"
+
+	if test $# -lt 2 ||
+	   { test "x!" = "x$1" && test $# -lt 3 ; }
+	then
+		BUG "too few parameters to test_i18ngrep"
+	fi
+
+	if test "x!" = "x$1"
+	then
+		shift
+		! grep "$@" && return 0
+
+		echo >&4 "error: '! grep $@' did find a match in:"
+	else
+		grep "$@" && return 0
+
+		echo >&4 "error: 'grep $@' didn't find a match in:"
+	fi
+
+	if test -s "$last_arg"
+	then
+		cat >&4 "$last_arg"
+	else
+		echo >&4 "<File '$last_arg' is empty>"
+	fi
+
+	return 1
+}
+
+# Call any command "$@" but be more verbose about its
+# failure. This is handy for commands like "test" which do
+# not output anything when they fail.
+verbose () {
+	"$@" && return 0
+	echo >&4 "command failed: $(git rev-parse --sq-quote "$@")"
+	return 1
+}
+
+# Check if the file expected to be empty is indeed empty, and barfs
+# otherwise.
+
+test_must_be_empty () {
+	test "$#" -ne 1 && BUG "1 param"
+	test_path_is_file "$1" &&
+	if test -s "$1"
+	then
+		echo "'$1' is not empty, it contains:"
+		cat "$1"
+		return 1
+	fi
+}
+
+# Tests that its two parameters refer to the same revision, or if '!' is
+# provided first, that its other two parameters refer to different
+# revisions.
+test_cmp_rev () {
+	local op='=' wrong_result=different
+
+	if test $# -ge 1 && test "x$1" = 'x!'
+	then
+	    op='!='
+	    wrong_result='the same'
+	    shift
+	fi
+	if test $# != 2
+	then
+		BUG "test_cmp_rev requires two revisions, but got $#"
+	else
+		local r1 r2
+		r1=$(git rev-parse --verify "$1") &&
+		r2=$(git rev-parse --verify "$2") || return 1
+
+		if ! test "$r1" "$op" "$r2"
+		then
+			cat >&4 <<-EOF
+			error: two revisions point to $wrong_result objects:
+			  '$1': $r1
+			  '$2': $r2
+			EOF
+			return 1
+		fi
+	fi
+}
+
+# Compare paths respecting core.ignoreCase
+test_cmp_fspath () {
+	if test "x$1" = "x$2"
+	then
+		return 0
+	fi
+
+	if test true != "$(git config --get --type=bool core.ignorecase)"
+	then
+		return 1
+	fi
+
+	test "x$(echo "$1" | tr A-Z a-z)" =  "x$(echo "$2" | tr A-Z a-z)"
+}
+
+# Print a sequence of integers in increasing order, either with
+# two arguments (start and end):
+#
+#     test_seq 1 5 -- outputs 1 2 3 4 5 one line at a time
+#
+# or with one argument (end), in which case it starts counting
+# from 1.
+
+test_seq () {
+	case $# in
+	1)	set 1 "$@" ;;
+	2)	;;
+	*)	BUG "not 1 or 2 parameters to test_seq" ;;
+	esac
+	test_seq_counter__=$1
+	while test "$test_seq_counter__" -le "$2"
+	do
+		echo "$test_seq_counter__"
+		test_seq_counter__=$(( $test_seq_counter__ + 1 ))
+	done
+}
+
+# This function can be used to schedule some commands to be run
+# unconditionally at the end of the test to restore sanity:
+#
+#	test_expect_success 'test core.capslock' '
+#		git config core.capslock true &&
+#		test_when_finished "git config --unset core.capslock" &&
+#		hello world
+#	'
+#
+# That would be roughly equivalent to
+#
+#	test_expect_success 'test core.capslock' '
+#		git config core.capslock true &&
+#		hello world
+#		git config --unset core.capslock
+#	'
+#
+# except that the greeting and config --unset must both succeed for
+# the test to pass.
+#
+# Note that under --immediate mode, no clean-up is done to help diagnose
+# what went wrong.
+
+test_when_finished () {
+	# We cannot detect when we are in a subshell in general, but by
+	# doing so on Bash is better than nothing (the test will
+	# silently pass on other shells).
+	test "${BASH_SUBSHELL-0}" = 0 ||
+	BUG "test_when_finished does nothing in a subshell"
+	test_cleanup="{ $*
+		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
+}
+
+# This function can be used to schedule some commands to be run
+# unconditionally at the end of the test script, e.g. to stop a daemon:
+#
+#	test_expect_success 'test git daemon' '
+#		git daemon &
+#		daemon_pid=$! &&
+#		test_atexit 'kill $daemon_pid' &&
+#		hello world
+#	'
+#
+# The commands will be executed before the trash directory is removed,
+# i.e. the atexit commands will still be able to access any pidfiles or
+# socket files.
+#
+# Note that these commands will be run even when a test script run
+# with '--immediate' fails.  Be careful with your atexit commands to
+# minimize any changes to the failed state.
+
+test_atexit () {
+	# We cannot detect when we are in a subshell in general, but by
+	# doing so on Bash is better than nothing (the test will
+	# silently pass on other shells).
+	test "${BASH_SUBSHELL-0}" = 0 ||
+	BUG "test_atexit does nothing in a subshell"
+	test_atexit_cleanup="{ $*
+		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_atexit_cleanup"
+}
+
+# Deprecated wrapper for "git init", use "git init" directly instead
+# Usage: test_create_repo <directory>
+test_create_repo () {
+	git init "$@"
+}
+
+# This function helps on symlink challenged file systems when it is not
+# important that the file system entry is a symbolic link.
+# Use test_ln_s_add instead of "ln -s x y && git add y" to add a
+# symbolic link entry y to the index.
+
+test_ln_s_add () {
+	if test_have_prereq SYMLINKS
+	then
+		ln -s "$1" "$2" &&
+		git update-index --add "$2"
+	else
+		printf '%s' "$1" >"$2" &&
+		ln_s_obj=$(git hash-object -w "$2") &&
+		git update-index --add --cacheinfo 120000 $ln_s_obj "$2" &&
+		# pick up stat info from the file
+		git update-index "$2"
+	fi
+}
+
+# This function writes out its parameters, one per line
+test_write_lines () {
+	printf "%s\n" "$@"
+}
+
+perl () {
+	command "$PERL_PATH" "$@" 2>&7
+} 7>&2 2>&4
+
+# Given the name of an environment variable with a bool value, normalize
+# its value to a 0 (true) or 1 (false or empty string) return code.
+#
+#   test_bool_env GIT_TEST_HTTPD <default-value>
+#
+# Return with code corresponding to the given default value if the variable
+# is unset.
+# Abort the test script if either the value of the variable or the default
+# are not valid bool values.
+
+test_bool_env () {
+	if test $# != 2
+	then
+		BUG "test_bool_env requires two parameters (variable name and default value)"
+	fi
+
+	git env--helper --type=bool --default="$2" --exit-code "$1"
+	ret=$?
+	case $ret in
+	0|1)	# unset or valid bool value
+		;;
+	*)	# invalid bool value or something unexpected
+		error >&7 "test_bool_env requires bool values both for \$$1 and for the default fallback"
+		;;
+	esac
+	return $ret
+}
+
+# Exit the test suite, either by skipping all remaining tests or by
+# exiting with an error. If our prerequisite variable $1 falls back
+# on a default assume we were opportunistically trying to set up some
+# tests and we skip. If it is explicitly "true", then we report a failure.
+#
+# The error/skip message should be given by $2.
+#
+test_skip_or_die () {
+	if ! test_bool_env "$1" false
+	then
+		skip_all=$2
+		test_done
+	fi
+	error "$2"
+}
+
+# The following mingw_* functions obey POSIX shell syntax, but are actually
+# bash scripts, and are meant to be used only with bash on Windows.
+
+# A test_cmp function that treats LF and CRLF equal and avoids to fork
+# diff when possible.
+mingw_test_cmp () {
+	# Read text into shell variables and compare them. If the results
+	# are different, use regular diff to report the difference.
+	local test_cmp_a= test_cmp_b=
+
+	# When text came from stdin (one argument is '-') we must feed it
+	# to diff.
+	local stdin_for_diff=
+
+	# Since it is difficult to detect the difference between an
+	# empty input file and a failure to read the files, we go straight
+	# to diff if one of the inputs is empty.
+	if test -s "$1" && test -s "$2"
+	then
+		# regular case: both files non-empty
+		mingw_read_file_strip_cr_ test_cmp_a <"$1"
+		mingw_read_file_strip_cr_ test_cmp_b <"$2"
+	elif test -s "$1" && test "$2" = -
+	then
+		# read 2nd file from stdin
+		mingw_read_file_strip_cr_ test_cmp_a <"$1"
+		mingw_read_file_strip_cr_ test_cmp_b
+		stdin_for_diff='<<<"$test_cmp_b"'
+	elif test "$1" = - && test -s "$2"
+	then
+		# read 1st file from stdin
+		mingw_read_file_strip_cr_ test_cmp_a
+		mingw_read_file_strip_cr_ test_cmp_b <"$2"
+		stdin_for_diff='<<<"$test_cmp_a"'
+	fi
+	test -n "$test_cmp_a" &&
+	test -n "$test_cmp_b" &&
+	test "$test_cmp_a" = "$test_cmp_b" ||
+	eval "diff -u \"\$@\" $stdin_for_diff"
+}
+
+# $1 is the name of the shell variable to fill in
+mingw_read_file_strip_cr_ () {
+	# Read line-wise using LF as the line separator
+	# and use IFS to strip CR.
+	local line
+	while :
+	do
+		if IFS=$'\r' read -r -d $'\n' line
+		then
+			# good
+			line=$line$'\n'
+		else
+			# we get here at EOF, but also if the last line
+			# was not terminated by LF; in the latter case,
+			# some text was read
+			if test -z "$line"
+			then
+				# EOF, really
+				break
+			fi
+		fi
+		eval "$1=\$$1\$line"
+	done
+}
+
+# Like "env FOO=BAR some-program", but run inside a subshell, which means
+# it also works for shell functions (though those functions cannot impact
+# the environment outside of the test_env invocation).
+test_env () {
+	(
+		while test $# -gt 0
+		do
+			case "$1" in
+			*=*)
+				eval "${1%%=*}=\${1#*=}"
+				eval "export ${1%%=*}"
+				shift
+				;;
+			*)
+				"$@" 2>&7
+				exit
+				;;
+			esac
+		done
+	)
+} 7>&2 2>&4
+
+# Returns true if the numeric exit code in "$2" represents the expected signal
+# in "$1". Signals should be given numerically.
+test_match_signal () {
+	if test "$2" = "$((128 + $1))"
+	then
+		# POSIX
+		return 0
+	elif test "$2" = "$((256 + $1))"
+	then
+		# ksh
+		return 0
+	fi
+	return 1
+}
+
+# Read up to "$1" bytes (or to EOF) from stdin and write them to stdout.
+test_copy_bytes () {
+	perl -e '
+		my $len = $ARGV[1];
+		while ($len > 0) {
+			my $s;
+			my $nread = sysread(STDIN, $s, $len);
+			die "cannot read: $!" unless defined($nread);
+			last unless $nread;
+			print $s;
+			$len -= $nread;
+		}
+	' - "$1"
+}
+
+# run "$@" inside a non-git directory
+nongit () {
+	test -d non-repo ||
+	mkdir non-repo ||
+	return 1
+
+	(
+		GIT_CEILING_DIRECTORIES=$(pwd) &&
+		export GIT_CEILING_DIRECTORIES &&
+		cd non-repo &&
+		"$@" 2>&7
+	)
+} 7>&2 2>&4
+
+# These functions are historical wrappers around "test-tool pkt-line"
+# for older tests. Use "test-tool pkt-line" itself in new tests.
+packetize () {
+	if test $# -gt 0
+	then
+		packet="$*"
+		printf '%04x%s' "$((4 + ${#packet}))" "$packet"
+	else
+		test-tool pkt-line pack
+	fi
+}
+
+packetize_raw () {
+	test-tool pkt-line pack-raw-stdin
+}
+
+depacketize () {
+	test-tool pkt-line unpack
+}
+
+# Converts base-16 data into base-8. The output is given as a sequence of
+# escaped octals, suitable for consumption by 'printf'.
+hex2oct () {
+	perl -ne 'printf "\\%03o", hex for /../g'
+}
+
+# Set the hash algorithm in use to $1.  Only useful when testing the testsuite.
+test_set_hash () {
+	test_hash_algo="$1"
+}
+
+# Detect the hash algorithm in use.
+test_detect_hash () {
+	test_hash_algo="${GIT_TEST_DEFAULT_HASH:-sha1}"
+}
+
+# Load common hash metadata and common placeholder object IDs for use with
+# test_oid.
+test_oid_init () {
+	test -n "$test_hash_algo" || test_detect_hash &&
+	test_oid_cache <"$TEST_DIRECTORY/oid-info/hash-info" &&
+	test_oid_cache <"$TEST_DIRECTORY/oid-info/oid"
+}
+
+# Load key-value pairs from stdin suitable for use with test_oid.  Blank lines
+# and lines starting with "#" are ignored.  Keys must be shell identifier
+# characters.
+#
+# Examples:
+# rawsz sha1:20
+# rawsz sha256:32
+test_oid_cache () {
+	local tag rest k v &&
+
+	{ test -n "$test_hash_algo" || test_detect_hash; } &&
+	while read tag rest
+	do
+		case $tag in
+		\#*)
+			continue;;
+		?*)
+			# non-empty
+			;;
+		*)
+			# blank line
+			continue;;
+		esac &&
+
+		k="${rest%:*}" &&
+		v="${rest#*:}" &&
+
+		if ! expr "$k" : '[a-z0-9][a-z0-9]*$' >/dev/null
+		then
+			BUG 'bad hash algorithm'
+		fi &&
+		eval "test_oid_${k}_$tag=\"\$v\""
+	done
+}
+
+# Look up a per-hash value based on a key ($1).  The value must have been loaded
+# by test_oid_init or test_oid_cache.
+test_oid () {
+	local algo="${test_hash_algo}" &&
+
+	case "$1" in
+	--hash=*)
+		algo="${1#--hash=}" &&
+		shift;;
+	*)
+		;;
+	esac &&
+
+	local var="test_oid_${algo}_$1" &&
+
+	# If the variable is unset, we must be missing an entry for this
+	# key-hash pair, so exit with an error.
+	if eval "test -z \"\${$var+set}\""
+	then
+		BUG "undefined key '$1'"
+	fi &&
+	eval "printf '%s' \"\${$var}\""
+}
+
+# Insert a slash into an object ID so it can be used to reference a location
+# under ".git/objects".  For example, "deadbeef..." becomes "de/adbeef..".
+test_oid_to_path () {
+	local basename=${1#??}
+	echo "${1%$basename}/$basename"
+}
+
+# Parse oids from git ls-files --staged output
+test_parse_ls_files_stage_oids () {
+	awk '{print $2}' -
+}
+
+# Parse oids from git ls-tree output
+test_parse_ls_tree_oids () {
+	awk '{print $3}' -
+}
+
+# Choose a port number based on the test script's number and store it in
+# the given variable name, unless that variable already contains a number.
+test_set_port () {
+	local var=$1 port
+
+	if test $# -ne 1 || test -z "$var"
+	then
+		BUG "test_set_port requires a variable name"
+	fi
+
+	eval port=\$$var
+	case "$port" in
+	"")
+		# No port is set in the given env var, use the test
+		# number as port number instead.
+		# Remove not only the leading 't', but all leading zeros
+		# as well, so the arithmetic below won't (mis)interpret
+		# a test number like '0123' as an octal value.
+		port=${this_test#${this_test%%[1-9]*}}
+		if test "${port:-0}" -lt 1024
+		then
+			# root-only port, use a larger one instead.
+			port=$(($port + 10000))
+		fi
+		;;
+	*[!0-9]*|0*)
+		error >&7 "invalid port number: $port"
+		;;
+	*)
+		# The user has specified the port.
+		;;
+	esac
+
+	# Make sure that parallel '--stress' test jobs get different
+	# ports.
+	port=$(($port + ${GIT_TEST_STRESS_JOB_NR:-0}))
+	eval $var=$port
+}
+
+# Tests for the hidden file attribute on Windows
+test_path_is_hidden () {
+	test_have_prereq MINGW ||
+	BUG "test_path_is_hidden can only be used on Windows"
+
+	# Use the output of `attrib`, ignore the absolute path
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
+	return 1
+}
+
+# Check that the given command was invoked as part of the
+# trace2-format trace on stdin.
+#
+#	test_subcommand [!] <command> <args>... < <trace>
+#
+# For example, to look for an invocation of "git upload-pack
+# /path/to/repo"
+#
+#	GIT_TRACE2_EVENT=event.log git fetch ... &&
+#	test_subcommand git upload-pack "$PATH" <event.log
+#
+# If the first parameter passed is !, this instead checks that
+# the given command was not called.
+#
+test_subcommand () {
+	local negate=
+	if test "$1" = "!"
+	then
+		negate=t
+		shift
+	fi
+
+	local expr=$(printf '"%s",' "$@")
+	expr="${expr%,}"
+
+	if test -n "$negate"
+	then
+		! grep "\[$expr\]"
+	else
+		grep "\[$expr\]"
+	fi
+}
+
+# Check that the given command was invoked as part of the
+# trace2-format trace on stdin.
+#
+#	test_region [!] <category> <label> git <command> <args>...
+#
+# For example, to look for trace2_region_enter("index", "do_read_index", repo)
+# in an invocation of "git checkout HEAD~1", run
+#
+#	GIT_TRACE2_EVENT="$(pwd)/trace.txt" GIT_TRACE2_EVENT_NESTING=10 \
+#		git checkout HEAD~1 &&
+#	test_region index do_read_index <trace.txt
+#
+# If the first parameter passed is !, this instead checks that
+# the given region was not entered.
+#
+test_region () {
+	local expect_exit=0
+	if test "$1" = "!"
+	then
+		expect_exit=1
+		shift
+	fi
+
+	grep -e	'"region_enter".*"category":"'"$1"'","label":"'"$2"\" "$3"
+	exitcode=$?
+
+	if test $exitcode != $expect_exit
+	then
+		return 1
+	fi
+
+	grep -e	'"region_leave".*"category":"'"$1"'","label":"'"$2"\" "$3"
+	exitcode=$?
+
+	if test $exitcode != $expect_exit
+	then
+		return 1
+	fi
+
+	return 0
+}
+
+# Print the destination of symlink(s) provided as arguments. Basically
+# the same as the readlink command, but it's not available everywhere.
+test_readlink () {
+	perl -le 'print readlink($_) for @ARGV' "$@"
+}
+
+# Set mtime to a fixed "magic" timestamp in mid February 2009, before we
+# run an operation that may or may not touch the file.  If the file was
+# touched, its timestamp will not accidentally have such an old timestamp,
+# as long as your filesystem clock is reasonably correct.  To verify the
+# timestamp, follow up with test_is_magic_mtime.
+#
+# An optional increment to the magic timestamp may be specified as second
+# argument.
+test_set_magic_mtime () {
+	local inc=${2:-0} &&
+	local mtime=$((1234567890 + $inc)) &&
+	test-tool chmtime =$mtime "$1" &&
+	test_is_magic_mtime "$1" $inc
+}
+
+# Test whether the given file has the "magic" mtime set.  This is meant to
+# be used in combination with test_set_magic_mtime.
+#
+# An optional increment to the magic timestamp may be specified as second
+# argument.  Usually, this should be the same increment which was used for
+# the associated test_set_magic_mtime.
+test_is_magic_mtime () {
+	local inc=${2:-0} &&
+	local mtime=$((1234567890 + $inc)) &&
+	echo $mtime >.git/test-mtime-expect &&
+	test-tool chmtime --get "$1" >.git/test-mtime-actual &&
+	test_cmp .git/test-mtime-expect .git/test-mtime-actual
+	local ret=$?
+	rm -f .git/test-mtime-expect
+	rm -f .git/test-mtime-actual
+	return $ret
+}
+
+# Given two filenames, parse both using 'git config --list --file'
+# and compare the sorted output of those commands. Useful when
+# wanting to ignore whitespace differences and sorting concerns.
+test_cmp_config_output () {
+	git config --list --file="$1" >config-expect &&
+	git config --list --file="$2" >config-actual &&
+	sort config-expect >sorted-expect &&
+	sort config-actual >sorted-actual &&
+	test_cmp sorted-expect sorted-actual
+}