thodg/got/regress/cmdline/update.sh

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• Show log

  Commit

• Author : Stefan Sperling
  Date : 2019-01-13 13:59:20
  Hash : 21908da4
  Message : fix bug where update got confused by sub-sub directories

• regress/cmdline/update.sh

• #!/bin/sh
  #
  # Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
  #
  # Permission to use, copy, modify, and distribute this software for any
  # purpose with or without fee is hereby granted, provided that the above
  # copyright notice and this permission notice appear in all copies.
  #
  # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  
  . ./common.sh
  
  function test_update_basic {
  	local testroot=`test_init update_basic`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "modified alpha" > $testroot/repo/alpha
  	git_commit $testroot/repo -m "modified alpha"
  
  	echo "U  alpha" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "modified alpha" > $testroot/content.expected
  	cat $testroot/wt/alpha > $testroot/content
  
  	cmp $testroot/content.expected $testroot/content
  	ret="$?"
  	if [ "$ret" != "0" ]; then
  		diff -u $testroot/content.expected $testroot/content
  	fi
  	test_done "$testroot" "$ret"
  }
  
  function test_update_adds_file {
  	local testroot=`test_init update_adds_file`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "new" > $testroot/repo/gamma/new
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding a new file"
  
  	echo "A  gamma/new" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "new" >> $testroot/content.expected
  	cat $testroot/wt/gamma/new > $testroot/content
  
  	cmp $testroot/content.expected $testroot/content
  	ret="$?"
  	if [ "$ret" != "0" ]; then
  		diff -u $testroot/content.expected $testroot/content
  	fi
  	test_done "$testroot" "$ret"
  }
  
  function test_update_deletes_file {
  	local testroot=`test_init update_deletes_file`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	(cd $testroot/repo && git_rm $testroot/repo beta)
  	git_commit $testroot/repo -m "deleting a file"
  
  	echo "D  beta" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/beta ]; then
  		echo "removed file beta still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_deletes_dir {
  	local testroot=`test_init update_deletes_dir`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	(cd $testroot/repo && git_rm $testroot/repo -r epsilon)
  	git_commit $testroot/repo -m "deleting a directory"
  
  	echo "D  epsilon/zeta" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/epsilon ]; then
  		echo "removed dir epsilon still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_deletes_dir_with_path_prefix {
  	local testroot=`test_init update_deletes_dir_with_path_prefix`
  	local first_rev=`git_show_head $testroot/repo`
  
  	mkdir $testroot/repo/epsilon/psi
  	echo mu > $testroot/repo/epsilon/psi/mu
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding a sub-directory beneath epsilon"
  
  	# check out the epsilon/ sub-tree
  	got checkout -p epsilon $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	# update back to first commit and expect psi/mu to be deleted
  	echo "D  psi/mu" > $testroot/stdout.expected
  	echo "Updated to commit $first_rev" >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update -c $first_rev > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/psi ]; then
  		echo "removed dir psi still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_deletes_dir_recursively {
  	local testroot=`test_init update_deletes_dir_recursively`
  	local first_rev=`git_show_head $testroot/repo`
  
  	mkdir $testroot/repo/epsilon/psi
  	echo mu > $testroot/repo/epsilon/psi/mu
  	mkdir $testroot/repo/epsilon/psi/chi
  	echo tau > $testroot/repo/epsilon/psi/chi/tau
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding a sub-directory beneath epsilon"
  
  	# check out the epsilon/ sub-tree
  	got checkout -p epsilon $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	# update back to first commit and expect psi/mu to be deleted
  	echo "D  psi/chi/tau" > $testroot/stdout.expected
  	echo "D  psi/mu" >> $testroot/stdout.expected
  	echo "Updated to commit $first_rev" >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update -c $first_rev > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/psi ]; then
  		echo "removed dir psi still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_sibling_dirs_with_common_prefix {
  	local testroot=`test_init update_sibling_dirs_with_common_prefix`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	mkdir $testroot/repo/epsilon2
  	echo mu > $testroot/repo/epsilon2/mu
  	(cd $testroot/repo && git add epsilon2/mu)
  	git_commit $testroot/repo -m "adding sibling of epsilon"
  	echo change > $testroot/repo/epsilon/zeta
  	git_commit $testroot/repo -m "changing epsilon/zeta"
  
  	echo "U  epsilon/zeta" > $testroot/stdout.expected
  	echo "A  epsilon2/mu" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "another change" > $testroot/repo/epsilon/zeta
  	git_commit $testroot/repo -m "changing epsilon/zeta again"
  
  	echo "U  epsilon/zeta" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	# Bug: This update used to do delete/add epsilon2/mu again:
  	# U  epsilon/zeta
  	# D  epsilon2/mu <--- not intended
  	# A  epsilon2/mu <--- not intended
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_dir_with_dot_sibling {
  	local testroot=`test_init update_dir_with_dot_sibling`
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo text > $testroot/repo/epsilon.txt
  	(cd $testroot/repo && git add epsilon.txt)
  	git_commit $testroot/repo -m "adding sibling of epsilon"
  	echo change > $testroot/repo/epsilon/zeta
  	git_commit $testroot/repo -m "changing epsilon/zeta"
  
  	echo "A  epsilon.txt" > $testroot/stdout.expected
  	echo "U  epsilon/zeta" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo "another change" > $testroot/repo/epsilon/zeta
  	git_commit $testroot/repo -m "changing epsilon/zeta again"
  
  	echo "U  epsilon/zeta" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_moves_files_upwards {
  	local testroot=`test_init update_moves_files_upwards`
  
  	mkdir $testroot/repo/epsilon/psi
  	echo mu > $testroot/repo/epsilon/psi/mu
  	mkdir $testroot/repo/epsilon/psi/chi
  	echo tau > $testroot/repo/epsilon/psi/chi/tau
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding a sub-directory beneath epsilon"
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	(cd $testroot/repo && git mv epsilon/psi/mu epsilon/mu)
  	(cd $testroot/repo && git mv epsilon/psi/chi/tau epsilon/psi/tau)
  	git_commit $testroot/repo -m "moving files upwards"
  
  	echo "A  epsilon/mu" > $testroot/stdout.expected
  	echo "D  epsilon/psi/chi/tau" >> $testroot/stdout.expected
  	echo "D  epsilon/psi/mu" >> $testroot/stdout.expected
  	echo "A  epsilon/psi/tau" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/epsilon/psi/chi ]; then
  		echo "removed dir epsilon/psi/chi still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/epsilon/psi/mu ]; then
  		echo "removed file epsilon/psi/mu still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_moves_files_to_new_dir {
  	local testroot=`test_init update_moves_files_to_new_dir`
  
  	mkdir $testroot/repo/epsilon/psi
  	echo mu > $testroot/repo/epsilon/psi/mu
  	mkdir $testroot/repo/epsilon/psi/chi
  	echo tau > $testroot/repo/epsilon/psi/chi/tau
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding a sub-directory beneath epsilon"
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	mkdir -p $testroot/repo/epsilon-new/psi
  	(cd $testroot/repo && git mv epsilon/psi/mu epsilon-new/mu)
  	(cd $testroot/repo && git mv epsilon/psi/chi/tau epsilon-new/psi/tau)
  	git_commit $testroot/repo -m "moving files upwards"
  
  	echo "A  epsilon-new/mu" > $testroot/stdout.expected
  	echo "A  epsilon-new/psi/tau" >> $testroot/stdout.expected
  	echo "D  epsilon/psi/chi/tau" >> $testroot/stdout.expected
  	echo "D  epsilon/psi/mu" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/epsilon/psi/chi ]; then
  		echo "removed dir epsilon/psi/chi still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	if [ -e $testroot/wt/epsilon/psi/mu ]; then
  		echo "removed file epsilon/psi/mu still exists on disk" >&2
  		test_done "$testroot" "1"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_creates_missing_parent {
  	local testroot=`test_init update_creates_missing_parent no_tree`
  
  	touch $testroot/repo/Makefile
  	touch $testroot/repo/snake.6
  	touch $testroot/repo/snake.c
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding initial snake tree"
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	mkdir -p $testroot/repo/snake
  	(cd $testroot/repo && git mv Makefile snake.6 snake.c snake)
  	touch $testroot/repo/snake/move.c
  	touch $testroot/repo/snake/pathnames.h
  	touch $testroot/repo/snake/snake.h
  	mkdir -p $testroot/repo/snscore
  	touch $testroot/repo/snscore/Makefile
  	touch $testroot/repo/snscore/snscore.c
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "restructuring snake tree"
  
  	echo "D  Makefile" > $testroot/stdout.expected
  	echo "D  snake.6" >> $testroot/stdout.expected
  	echo "D  snake.c" >> $testroot/stdout.expected
  	echo "A  snake/Makefile" >> $testroot/stdout.expected
  	echo "A  snake/move.c" >> $testroot/stdout.expected
  	echo "A  snake/pathnames.h" >> $testroot/stdout.expected
  	echo "A  snake/snake.6" >> $testroot/stdout.expected
  	echo "A  snake/snake.c" >> $testroot/stdout.expected
  	echo "A  snake/snake.h" >> $testroot/stdout.expected
  	echo "A  snscore/Makefile" >> $testroot/stdout.expected
  	echo "A  snscore/snscore.c" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_creates_missing_parent_with_subdir {
  	local testroot=`test_init update_creates_missing_parent no_tree`
  
  	touch $testroot/repo/Makefile
  	touch $testroot/repo/snake.6
  	touch $testroot/repo/snake.c
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding initial snake tree"
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	mkdir -p $testroot/repo/sss/snake
  	(cd $testroot/repo && git mv Makefile snake.6 snake.c sss/snake)
  	touch $testroot/repo/sss/snake/move.c
  	touch $testroot/repo/sss/snake/pathnames.h
  	touch $testroot/repo/sss/snake/snake.h
  	mkdir -p $testroot/repo/snscore
  	touch $testroot/repo/snscore/Makefile
  	touch $testroot/repo/snscore/snscore.c
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "restructuring snake tree"
  
  	echo "D  Makefile" > $testroot/stdout.expected
  	echo "D  snake.6" >> $testroot/stdout.expected
  	echo "D  snake.c" >> $testroot/stdout.expected
  	echo "A  snscore/Makefile" >> $testroot/stdout.expected
  	echo "A  snscore/snscore.c" >> $testroot/stdout.expected
  	echo "A  sss/snake/Makefile" >> $testroot/stdout.expected
  	echo "A  sss/snake/move.c" >> $testroot/stdout.expected
  	echo "A  sss/snake/pathnames.h" >> $testroot/stdout.expected
  	echo "A  sss/snake/snake.6" >> $testroot/stdout.expected
  	echo "A  sss/snake/snake.c" >> $testroot/stdout.expected
  	echo "A  sss/snake/snake.h" >> $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  function test_update_file_in_subsubdir {
  	local testroot=`test_init update_fle_in_subsubdir no_tree`
  
  	touch $testroot/repo/Makefile
  	mkdir -p $testroot/repo/altq
  	touch $testroot/repo/altq/if_altq.h
  	mkdir -p $testroot/repo/arch/alpha
  	touch $testroot/repo/arch/alpha/Makefile
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "adding initial tree"
  
  	got checkout $testroot/repo $testroot/wt > /dev/null
  	if [ "$?" != "0" ]; then
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	echo change > $testroot/repo/arch/alpha/Makefile
  	(cd $testroot/repo && git add .)
  	git_commit $testroot/repo -m "changed a file"
  
  	echo "U  arch/alpha/Makefile" > $testroot/stdout.expected
  	echo -n "Updated to commit " >> $testroot/stdout.expected
  	git_show_head $testroot/repo >> $testroot/stdout.expected
  	echo >> $testroot/stdout.expected
  
  	(cd $testroot/wt && got update > $testroot/stdout)
  
  	cmp $testroot/stdout.expected $testroot/stdout
  	if [ "$?" != "0" ]; then
  		diff -u $testroot/stdout.expected $testroot/stdout
  		test_done "$testroot" "$?"
  		return 1
  	fi
  
  	test_done "$testroot" "0"
  }
  
  run_test test_update_basic
  run_test test_update_adds_file
  run_test test_update_deletes_file
  run_test test_update_deletes_dir
  run_test test_update_deletes_dir_with_path_prefix
  run_test test_update_deletes_dir_recursively
  run_test test_update_sibling_dirs_with_common_prefix
  run_test test_update_dir_with_dot_sibling
  run_test test_update_moves_files_upwards
  run_test test_update_moves_files_to_new_dir
  run_test test_update_creates_missing_parent
  run_test test_update_creates_missing_parent_with_subdir
  run_test test_update_file_in_subsubdir