[PATCH 3/5] t5318: avoid top-level directory changes

[Taylor Blau <me@ttaylorr.com>]

Avoid changing the current working directory from outside of a sub-shell
during the tests in t5318.

Each test has mostly straightforward changes, either:

  - Removing the top-level `cd "$TRASH_DIRECTORY/full"`, which is
    unnecessary after ensuring that other tests don't change their
    working directory outside of a sub-shell.

  - Changing any Git invocations which want to be in a sub-directory by
    either (a) adding a "-C $DIR" argument, or (b) moving the whole test
    into a sub-shell.

While we're here, remove any explicit "git config core.commitGraph true"
invocations which were designed to enable use of the commit-graph. These
are unnecessary following 31b1de6a09b (commit-graph: turn on
commit-graph by default, 2019-08-13).

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 t/t5318-commit-graph.sh | 378 ++++++++++++++++++----------------------
 1 file changed, 172 insertions(+), 206 deletions(-)

diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index bf8a92317b3..4df76173a8d 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -24,12 +24,10 @@ test_expect_success 'usage shown with an error on unknown sub-command' '
 	test_cmp expect actual
 '
 
+objdir=".git/objects"
+
 test_expect_success 'setup full repo' '
-	mkdir full &&
-	cd "$TRASH_DIRECTORY/full" &&
-	git init &&
-	git config core.commitGraph true &&
-	objdir=".git/objects"
+	git init full
 '
 
 test_expect_success POSIXPERM 'tweak umask for modebit tests' '
@@ -37,31 +35,28 @@ test_expect_success POSIXPERM 'tweak umask for modebit tests' '
 '
 
 test_expect_success 'verify graph with no graph file' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph verify
+	git -C full commit-graph verify
 '
 
 test_expect_success 'write graph with no packs' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write --object-dir $objdir &&
-	test_path_is_missing $objdir/info/commit-graph
+	git -C full commit-graph write --object-dir $objdir &&
+	test_path_is_missing full/$objdir/info/commit-graph
 '
 
 test_expect_success 'exit with correct error on bad input to --stdin-packs' '
-	cd "$TRASH_DIRECTORY/full" &&
 	echo doesnotexist >in &&
-	test_expect_code 1 git commit-graph write --stdin-packs <in 2>stderr &&
+	test_expect_code 1 git -C full commit-graph write --stdin-packs \
+		<in 2>stderr &&
 	test_i18ngrep "error adding pack" stderr
 '
 
 test_expect_success 'create commits and repack' '
-	cd "$TRASH_DIRECTORY/full" &&
 	for i in $(test_seq 3)
 	do
-		test_commit $i &&
-		git branch commits/$i || return 1
+		test_commit -C full $i &&
+		git -C full branch commits/$i || return 1
 	done &&
-	git repack
+	git -C full repack
 '
 
 . "$TEST_DIRECTORY"/lib-commit-graph.sh
@@ -69,117 +64,106 @@ test_expect_success 'create commits and repack' '
 graph_git_behavior 'no graph' full commits/3 commits/1
 
 test_expect_success 'exit with correct error on bad input to --stdin-commits' '
-	cd "$TRASH_DIRECTORY/full" &&
 	# invalid, non-hex OID
-	echo HEAD >in &&
-	test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
+	echo HEAD | test_expect_code 1 git -C full commit-graph write \
+		--stdin-commits 2>stderr &&
 	test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
 	# non-existent OID
-	echo $ZERO_OID >in &&
-	test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
+	echo $ZERO_OID | test_expect_code 1 git -C full commit-graph write \
+		--stdin-commits 2>stderr &&
 	test_i18ngrep "invalid object" stderr &&
 	# valid commit and tree OID
-	git rev-parse HEAD HEAD^{tree} >in &&
-	git commit-graph write --stdin-commits <in &&
-	graph_read_expect 3 generation_data
+	git -C full rev-parse HEAD HEAD^{tree} >in &&
+	git -C full commit-graph write --stdin-commits <in &&
+	graph_read_expect -C full 3 generation_data
 '
 
 test_expect_success 'write graph' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "3" generation_data
+	git -C full commit-graph write &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 3 generation_data
 '
 
 test_expect_success POSIXPERM 'write graph has correct permissions' '
-	test_path_is_file $objdir/info/commit-graph &&
+	test_path_is_file full/$objdir/info/commit-graph &&
 	echo "-r--r--r--" >expect &&
-	test_modebits $objdir/info/commit-graph >actual &&
+	test_modebits full/$objdir/info/commit-graph >actual &&
 	test_cmp expect actual
 '
 
 graph_git_behavior 'graph exists' full commits/3 commits/1
 
 test_expect_success 'Add more commits' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git reset --hard commits/1 &&
+	git -C full reset --hard commits/1 &&
 	for i in $(test_seq 4 5)
 	do
-		test_commit $i &&
-		git branch commits/$i || return 1
+		test_commit -C full $i &&
+		git -C full branch commits/$i || return 1
 	done &&
-	git reset --hard commits/2 &&
+	git -C full reset --hard commits/2 &&
 	for i in $(test_seq 6 7)
 	do
-		test_commit $i &&
-		git branch commits/$i || return 1
+		test_commit -C full $i &&
+		git -C full branch commits/$i || return 1
 	done &&
-	git reset --hard commits/2 &&
-	git merge commits/4 &&
-	git branch merge/1 &&
-	git reset --hard commits/4 &&
-	git merge commits/6 &&
-	git branch merge/2 &&
-	git reset --hard commits/3 &&
-	git merge commits/5 commits/7 &&
-	git branch merge/3 &&
-	git repack
+	git -C full reset --hard commits/2 &&
+	git -C full merge commits/4 &&
+	git -C full branch merge/1 &&
+	git -C full reset --hard commits/4 &&
+	git -C full merge commits/6 &&
+	git -C full branch merge/2 &&
+	git -C full reset --hard commits/3 &&
+	git -C full merge commits/5 commits/7 &&
+	git -C full branch merge/3 &&
+	git -C full repack
 '
 
 test_expect_success 'commit-graph write progress off for redirected stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write 2>err &&
+	git -C full commit-graph write 2>err &&
 	test_must_be_empty err
 '
 
 test_expect_success 'commit-graph write force progress on for stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	GIT_PROGRESS_DELAY=0 git commit-graph write --progress 2>err &&
+	GIT_PROGRESS_DELAY=0 git -C full commit-graph write --progress 2>err &&
 	test_file_not_empty err
 '
 
 test_expect_success 'commit-graph write with the --no-progress option' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write --no-progress 2>err &&
+	git -C full commit-graph write --no-progress 2>err &&
 	test_must_be_empty err
 '
 
 test_expect_success 'commit-graph write --stdin-commits progress off for redirected stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse commits/5 >in &&
-	git commit-graph write --stdin-commits <in 2>err &&
+	git -C full rev-parse commits/5 >in &&
+	git -C full commit-graph write --stdin-commits <in 2>err &&
 	test_must_be_empty err
 '
 
 test_expect_success 'commit-graph write --stdin-commits force progress on for stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse commits/5 >in &&
-	GIT_PROGRESS_DELAY=0 git commit-graph write --stdin-commits --progress <in 2>err &&
+	git -C full rev-parse commits/5 >in &&
+	GIT_PROGRESS_DELAY=0 git -C full commit-graph write --stdin-commits \
+		--progress <in 2>err &&
 	test_i18ngrep "Collecting commits from input" err
 '
 
 test_expect_success 'commit-graph write --stdin-commits with the --no-progress option' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse commits/5 >in &&
-	git commit-graph write --stdin-commits --no-progress <in 2>err &&
+	git -C full rev-parse commits/5 >in &&
+	git -C full commit-graph write --stdin-commits --no-progress <in 2>err &&
 	test_must_be_empty err
 '
 
 test_expect_success 'commit-graph verify progress off for redirected stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph verify 2>err &&
+	git -C full commit-graph verify 2>err &&
 	test_must_be_empty err
 '
 
 test_expect_success 'commit-graph verify force progress on for stderr' '
-	cd "$TRASH_DIRECTORY/full" &&
-	GIT_PROGRESS_DELAY=0 git commit-graph verify --progress 2>err &&
+	GIT_PROGRESS_DELAY=0 git -C full commit-graph verify --progress 2>err &&
 	test_file_not_empty err
 '
 
 test_expect_success 'commit-graph verify with the --no-progress option' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph verify --no-progress 2>err &&
+	git -C full commit-graph verify --no-progress 2>err &&
 	test_must_be_empty err
 '
 
@@ -194,10 +178,9 @@ test_expect_success 'commit-graph verify with the --no-progress option' '
 # 1
 
 test_expect_success 'write graph with merges' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "10" "generation_data extra_edges"
+	git -C full commit-graph write &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 10 "generation_data extra_edges"
 '
 
 graph_git_behavior 'merge 1 vs 2' full merge/1 merge/2
@@ -205,12 +188,11 @@ graph_git_behavior 'merge 1 vs 3' full merge/1 merge/3
 graph_git_behavior 'merge 2 vs 3' full merge/2 merge/3
 
 test_expect_success 'Add one more commit' '
-	cd "$TRASH_DIRECTORY/full" &&
-	test_commit 8 &&
-	git branch commits/8 &&
-	ls $objdir/pack | grep idx >existing-idx &&
-	git repack &&
-	ls $objdir/pack| grep idx | grep -v -f existing-idx >new-idx
+	test_commit -C full 8 &&
+	git -C full branch commits/8 &&
+	ls full/$objdir/pack | grep idx >existing-idx &&
+	git -C full repack &&
+	ls full/$objdir/pack| grep idx | grep -v -f existing-idx >new-idx
 '
 
 # Current graph structure:
@@ -229,114 +211,101 @@ graph_git_behavior 'mixed mode, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'mixed mode, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'write graph with new commit' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "generation_data extra_edges"
+	git -C full commit-graph write &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 11 "generation_data extra_edges"
 '
 
 graph_git_behavior 'full graph, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'full graph, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'write graph with nothing new' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "generation_data extra_edges"
+	git -C full commit-graph write &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 11 "generation_data extra_edges"
 '
 
 graph_git_behavior 'cleared graph, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'cleared graph, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'build graph from latest pack with closure' '
-	cd "$TRASH_DIRECTORY/full" &&
-	cat new-idx | git commit-graph write --stdin-packs &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "9" "generation_data extra_edges"
+	git -C full commit-graph write --stdin-packs <new-idx &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 9 "generation_data extra_edges"
 '
 
 graph_git_behavior 'graph from pack, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'graph from pack, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'build graph from commits with closure' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git tag -a -m "merge" tag/merge merge/2 &&
-	git rev-parse tag/merge >commits-in &&
-	git rev-parse merge/1 >>commits-in &&
-	cat commits-in | git commit-graph write --stdin-commits &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "6" "generation_data"
+	git -C full tag -a -m "merge" tag/merge merge/2 &&
+	git -C full rev-parse tag/merge >commits-in &&
+	git -C full rev-parse merge/1 >>commits-in &&
+	git -C full commit-graph write --stdin-commits <commits-in &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 6 "generation_data"
 '
 
 graph_git_behavior 'graph from commits, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'graph from commits, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'build graph from commits with append' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse merge/3 | git commit-graph write --stdin-commits --append &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "10" "generation_data extra_edges"
+	git -C full rev-parse merge/3 >in &&
+	git -C full commit-graph write --stdin-commits --append <in &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 10 "generation_data extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'build graph using --reachable' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit-graph write --reachable &&
-	test_path_is_file $objdir/info/commit-graph &&
-	graph_read_expect "11" "generation_data extra_edges"
+	git -C full commit-graph write --reachable &&
+	test_path_is_file full/$objdir/info/commit-graph &&
+	graph_read_expect -C full 11 "generation_data extra_edges"
 '
 
 graph_git_behavior 'append graph, commit 8 vs merge 1' full commits/8 merge/1
 graph_git_behavior 'append graph, commit 8 vs merge 2' full commits/8 merge/2
 
 test_expect_success 'setup bare repo' '
-	cd "$TRASH_DIRECTORY" &&
-	git clone --bare --no-local full bare &&
-	cd bare &&
-	git config core.commitGraph true &&
-	baredir="./objects"
+	git clone --bare --no-local full bare
 '
 
 graph_git_behavior 'bare repo, commit 8 vs merge 1' bare commits/8 merge/1
 graph_git_behavior 'bare repo, commit 8 vs merge 2' bare commits/8 merge/2
 
 test_expect_success 'write graph in bare repo' '
-	cd "$TRASH_DIRECTORY/bare" &&
-	git commit-graph write &&
-	test_path_is_file $baredir/info/commit-graph &&
-	graph_read_expect "11" "generation_data extra_edges"
+	git -C bare commit-graph write &&
+	test_path_is_file bare/objects/info/commit-graph &&
+	graph_read_expect -C bare 11 "generation_data extra_edges"
 '
 
 graph_git_behavior 'bare repo with graph, commit 8 vs merge 1' bare commits/8 merge/1
 graph_git_behavior 'bare repo with graph, commit 8 vs merge 2' bare commits/8 merge/2
 
 test_expect_success 'perform fast-forward merge in full repo' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git checkout -b merge-5-to-8 commits/5 &&
-	git merge commits/8 &&
-	git show-ref -s merge-5-to-8 >output &&
-	git show-ref -s commits/8 >expect &&
+	git -C full checkout -b merge-5-to-8 commits/5 &&
+	git -C full merge commits/8 &&
+	git -C full show-ref -s merge-5-to-8 >output &&
+	git -C full show-ref -s commits/8 >expect &&
 	test_cmp expect output
 '
 
 test_expect_success 'check that gc computes commit-graph' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git commit --allow-empty -m "blank" &&
-	git commit-graph write --reachable &&
-	cp $objdir/info/commit-graph commit-graph-before-gc &&
-	git reset --hard HEAD~1 &&
-	git config gc.writeCommitGraph true &&
-	git gc &&
-	cp $objdir/info/commit-graph commit-graph-after-gc &&
+	test_commit -C full --no-tag blank &&
+	git -C full commit-graph write --reachable &&
+	cp full/$objdir/info/commit-graph commit-graph-before-gc &&
+	git -C full reset --hard HEAD~1 &&
+	test_config -C full gc.writeCommitGraph true &&
+	git -C full gc &&
+	cp full/$objdir/info/commit-graph commit-graph-after-gc &&
 	! test_cmp_bin commit-graph-before-gc commit-graph-after-gc &&
-	git commit-graph write --reachable &&
-	test_cmp_bin commit-graph-after-gc $objdir/info/commit-graph
+	git -C full commit-graph write --reachable &&
+	test_cmp_bin commit-graph-after-gc full/$objdir/info/commit-graph
 '
 
 test_expect_success 'replace-objects invalidates commit-graph' '
-	cd "$TRASH_DIRECTORY" &&
 	test_when_finished rm -rf replace &&
 	git clone full replace &&
 	(
@@ -359,7 +328,6 @@ test_expect_success 'replace-objects invalidates commit-graph' '
 '
 
 test_expect_success 'commit grafts invalidate commit-graph' '
-	cd "$TRASH_DIRECTORY" &&
 	test_when_finished rm -rf graft &&
 	git clone --template= full graft &&
 	(
@@ -384,7 +352,6 @@ test_expect_success 'commit grafts invalidate commit-graph' '
 '
 
 test_expect_success 'replace-objects invalidates commit-graph' '
-	cd "$TRASH_DIRECTORY" &&
 	test_when_finished rm -rf shallow &&
 	git clone --depth 2 "file://$TRASH_DIRECTORY/full" shallow &&
 	(
@@ -427,24 +394,25 @@ test_expect_success 'warn on improper hash version' '
 '
 
 test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow chunk' '
-	cd "$TRASH_DIRECTORY/full" &&
 	UNIX_EPOCH_ZERO="@0 +0000" &&
 	FUTURE_DATE="@4147483646 +0000" &&
-	rm -f .git/objects/info/commit-graph &&
-	test_commit --date "$FUTURE_DATE" future-1 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" old-1 &&
-	git commit-graph write --reachable &&
-	test_commit --date "$FUTURE_DATE" future-2 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" old-2 &&
-	git commit-graph write --reachable --split=no-merge &&
-	test_commit extra &&
-	git commit-graph write --reachable --split=no-merge &&
-	git commit-graph write --reachable &&
-	graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
-	mv .git/objects/info/commit-graph commit-graph-upgraded &&
-	git commit-graph write --reachable &&
-	graph_read_expect 16 "generation_data generation_data_overflow extra_edges" &&
-	test_cmp .git/objects/info/commit-graph commit-graph-upgraded
+	rm -f full/.git/objects/info/commit-graph &&
+	test_commit -C full --date "$FUTURE_DATE" future-1 &&
+	test_commit -C full --date "$UNIX_EPOCH_ZERO" old-1 &&
+	git -C full commit-graph write --reachable &&
+	test_commit -C full --date "$FUTURE_DATE" future-2 &&
+	test_commit -C full --date "$UNIX_EPOCH_ZERO" old-2 &&
+	git -C full commit-graph write --reachable --split=no-merge &&
+	test_commit -C full extra &&
+	git -C full commit-graph write --reachable --split=no-merge &&
+	git -C full commit-graph write --reachable &&
+	graph_read_expect -C full 16 \
+		"generation_data generation_data_overflow extra_edges" &&
+	mv full/.git/objects/info/commit-graph commit-graph-upgraded &&
+	git -C full commit-graph write --reachable &&
+	graph_read_expect -C full 16 \
+		"generation_data generation_data_overflow extra_edges" &&
+	test_cmp full/.git/objects/info/commit-graph commit-graph-upgraded
 '
 
 # the verify tests below expect the commit-graph to contain
@@ -454,10 +422,11 @@ test_expect_success TIME_IS_64BIT,TIME_T_IS_64BIT 'lower layers have overflow ch
 # and the tests will likely break.
 
 test_expect_success 'git commit-graph verify' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git rev-parse commits/8 | git -c commitGraph.generationVersion=1 commit-graph write --stdin-commits &&
-	git commit-graph verify >output &&
-	graph_read_expect 9 extra_edges 1
+	git -C full rev-parse commits/8 >in &&
+	git -C full -c commitGraph.generationVersion=1 commit-graph write \
+		--stdin-commits <in &&
+	git -C full commit-graph verify >output &&
+	graph_read_expect -C full 9 extra_edges 1
 '
 
 NUM_COMMITS=9
@@ -495,25 +464,24 @@ GRAPH_BYTE_OCTOPUS=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4))
 GRAPH_BYTE_FOOTER=$(($GRAPH_OCTOPUS_DATA_OFFSET + 4 * $NUM_OCTOPUS_EDGES))
 
 corrupt_graph_setup() {
-	cd "$TRASH_DIRECTORY/full" &&
-	test_when_finished mv commit-graph-backup $objdir/info/commit-graph &&
-	cp $objdir/info/commit-graph commit-graph-backup &&
-	chmod u+w $objdir/info/commit-graph
+	test_when_finished mv commit-graph-backup full/$objdir/info/commit-graph &&
+	cp full/$objdir/info/commit-graph commit-graph-backup &&
+	chmod u+w full/$objdir/info/commit-graph
 }
 
 corrupt_graph_verify() {
 	grepstr=$1
-	test_must_fail git commit-graph verify 2>test_err &&
+	test_must_fail git -C full commit-graph verify 2>test_err &&
 	grep -v "^+" test_err >err &&
 	test_i18ngrep "$grepstr" err &&
 	if test "$2" != "no-copy"
 	then
-		cp $objdir/info/commit-graph commit-graph-pre-write-test
+		cp full/$objdir/info/commit-graph commit-graph-pre-write-test
 	fi &&
-	git status --short &&
-	GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git commit-graph write &&
-	chmod u+w $objdir/info/commit-graph &&
-	git commit-graph verify
+	git -C full status --short &&
+	GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE=true git -C full commit-graph write &&
+	chmod u+w full/$objdir/info/commit-graph &&
+	git -C full commit-graph verify
 }
 
 # usage: corrupt_graph_and_verify <position> <data> <string> [<zero_pos>]
@@ -527,24 +495,24 @@ corrupt_graph_and_verify() {
 	data="${2:-\0}"
 	grepstr=$3
 	corrupt_graph_setup &&
-	orig_size=$(wc -c < $objdir/info/commit-graph) &&
+	orig_size=$(wc -c <full/$objdir/info/commit-graph) &&
 	zero_pos=${4:-${orig_size}} &&
-	printf "$data" | dd of="$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
-	dd of="$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
-	test-tool genzeros $(($orig_size - $zero_pos)) >>"$objdir/info/commit-graph" &&
+	printf "$data" | dd of="full/$objdir/info/commit-graph" bs=1 seek="$pos" conv=notrunc &&
+	dd of="full/$objdir/info/commit-graph" bs=1 seek="$zero_pos" if=/dev/null &&
+	test-tool genzeros $(($orig_size - $zero_pos)) >>"full/$objdir/info/commit-graph" &&
 	corrupt_graph_verify "$grepstr"
 
 }
 
 test_expect_success POSIXPERM,SANITY 'detect permission problem' '
 	corrupt_graph_setup &&
-	chmod 000 $objdir/info/commit-graph &&
+	chmod 000 full/$objdir/info/commit-graph &&
 	corrupt_graph_verify "Could not open" "no-copy"
 '
 
 test_expect_success 'detect too small' '
 	corrupt_graph_setup &&
-	echo "a small graph" >$objdir/info/commit-graph &&
+	echo "a small graph" >full/$objdir/info/commit-graph &&
 	corrupt_graph_verify "too small"
 '
 
@@ -655,33 +623,30 @@ test_expect_success 'detect incorrect chunk count' '
 '
 
 test_expect_success 'git fsck (checks commit-graph when config set to true)' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git fsck &&
+	git -C full fsck &&
 	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 		"incorrect checksum" &&
-	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
-	test_must_fail git -c core.commitGraph=true fsck
+	cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
+	test_must_fail git -C full -c core.commitGraph=true fsck
 '
 
 test_expect_success 'git fsck (ignores commit-graph when config set to false)' '
-	cd "$TRASH_DIRECTORY/full" &&
-	git fsck &&
+	git -C full fsck &&
 	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 		"incorrect checksum" &&
-	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
-	git -c core.commitGraph=false fsck
+	cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
+	git -C full -c core.commitGraph=false fsck
 '
 
 test_expect_success 'git fsck (checks commit-graph when config unset)' '
-	cd "$TRASH_DIRECTORY/full" &&
-	test_when_finished "git config core.commitGraph true" &&
+	test_when_finished "git -C full config core.commitGraph true" &&
 
-	git fsck &&
+	git -C full fsck &&
 	corrupt_graph_and_verify $GRAPH_BYTE_FOOTER "\00" \
 		"incorrect checksum" &&
-	test_unconfig core.commitGraph &&
-	cp commit-graph-pre-write-test $objdir/info/commit-graph &&
-	test_must_fail git fsck
+	test_unconfig -C full core.commitGraph &&
+	cp commit-graph-pre-write-test full/$objdir/info/commit-graph &&
+	test_must_fail git -C full fsck
 '
 
 test_expect_success 'git fsck shows commit-graph output with --progress' '
@@ -792,32 +757,33 @@ test_expect_success 'corrupt commit-graph write (missing tree)' '
 #
 
 test_expect_success 'set up and verify repo with generation data overflow chunk' '
-	objdir=".git/objects" &&
 	UNIX_EPOCH_ZERO="@0 +0000" &&
 	FUTURE_DATE="@2147483646 +0000" &&
-	cd "$TRASH_DIRECTORY" &&
-	mkdir repo &&
-	cd repo &&
-	git init &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
-	test_commit 2 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
-	git commit-graph write --reachable &&
-	graph_read_expect 3 generation_data &&
-	test_commit --date "$FUTURE_DATE" 4 &&
-	test_commit 5 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
-	git branch left &&
-	git reset --hard 3 &&
-	test_commit 7 &&
-	test_commit --date "$FUTURE_DATE" 8 &&
-	test_commit 9 &&
-	git branch right &&
-	git reset --hard 3 &&
-	test_merge M left right &&
-	git commit-graph write --reachable &&
-	graph_read_expect 10 "generation_data generation_data_overflow" &&
-	git commit-graph verify
+
+	git init repo &&
+	(
+		cd repo &&
+
+		test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
+		test_commit 2 &&
+		test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
+		git commit-graph write --reachable &&
+		graph_read_expect 3 generation_data &&
+		test_commit --date "$FUTURE_DATE" 4 &&
+		test_commit 5 &&
+		test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
+		git branch left &&
+		git reset --hard 3 &&
+		test_commit 7 &&
+		test_commit --date "$FUTURE_DATE" 8 &&
+		test_commit 9 &&
+		git branch right &&
+		git reset --hard 3 &&
+		test_merge M left right &&
+		git commit-graph write --reachable &&
+		graph_read_expect 10 "generation_data generation_data_overflow" &&
+		git commit-graph verify
+	)
 '
 
 graph_git_behavior 'generation data overflow chunk repo' repo left right
-- 
2.41.0.381.gd8424d64777