Merge branch 'dl/test-must-fail-fixes-2'

Test updates.

* dl/test-must-fail-fixes-2:
  t4124: only mark git command with test_must_fail
  t3507: use test_path_is_missing()
  t3507: fix indentation
  t3504: do check for conflict marker after failed cherry-pick
  t3419: stop losing return code of git command
  t3415: increase granularity of test_auto_{fixup,squash}()
  t3415: stop losing return codes of git commands
  t3310: extract common notes_merge_files_gone()
  t3030: use test_path_is_missing()
  t2018: replace "sha" with "oid"
  t2018: don't lose return code of git commands
  t2018: teach do_checkout() to accept `!` arg
  t2018: be more discerning when checking for expected exit codes
  t2018: improve style of if-statement
  t2018: add space between function name and ()
  t2018: remove trailing space from test description

t/t2018-checkout-branch.sh

@@ -1,50 +1,76 @@
 #!/bin/sh
 
-test_description='checkout '
+test_description='checkout'
 
 . ./test-lib.sh
 
-# Arguments: <branch> <sha> [<checkout options>]
+# Arguments: [!] <branch> <oid> [<checkout options>]
 #
 # Runs "git checkout" to switch to <branch>, testing that
 #
 #   1) we are on the specified branch, <branch>;
-#   2) HEAD is <sha>; if <sha> is not specified, the old HEAD is used.
+#   2) HEAD is <oid>; if <oid> is not specified, the old HEAD is used.
 #
 # If <checkout options> is not specified, "git checkout" is run with -b.
-do_checkout() {
+#
+# If the first argument is `!`, "git checkout" is expected to fail when
+# it is run.
+do_checkout () {
+	should_fail= &&
+	if test "x$1" = "x!"
+	then
+		should_fail=yes &&
+		shift
+	fi &&
 	exp_branch=$1 &&
 	exp_ref="refs/heads/$exp_branch" &&
 
-	# if <sha> is not specified, use HEAD.
-	exp_sha=${2:-$(git rev-parse --verify HEAD)} &&
+	# if <oid> is not specified, use HEAD.
+	exp_oid=${2:-$(git rev-parse --verify HEAD)} &&
 
 	# default options for git checkout: -b
-	if [ -z "$3" ]; then
+	if test -z "$3"
+	then
 		opts="-b"
 	else
 		opts="$3"
 	fi
 
-	git checkout $opts $exp_branch $exp_sha &&
+	if test -n "$should_fail"
+	then
+		test_must_fail git checkout $opts $exp_branch $exp_oid
+	else
+		git checkout $opts $exp_branch $exp_oid &&
+		echo "$exp_ref" >ref.expect &&
+		git rev-parse --symbolic-full-name HEAD >ref.actual &&
+		test_cmp ref.expect ref.actual &&
+		echo "$exp_oid" >oid.expect &&
+		git rev-parse --verify HEAD >oid.actual &&
+		test_cmp oid.expect oid.actual
+	fi
+}
 
-	test $exp_ref = $(git rev-parse --symbolic-full-name HEAD) &&
-	test $exp_sha = $(git rev-parse --verify HEAD)
+test_dirty_unmergeable () {
+	test_expect_code 1 git diff --exit-code
 }
 
-test_dirty_unmergeable() {
-	! git diff --exit-code >/dev/null
+test_dirty_unmergeable_discards_changes () {
+	git diff --exit-code
 }
 
-setup_dirty_unmergeable() {
+setup_dirty_unmergeable () {
 	echo >>file1 change2
 }
 
-test_dirty_mergeable() {
-	! git diff --cached --exit-code >/dev/null
+test_dirty_mergeable () {
+	test_expect_code 1 git diff --cached --exit-code
+}
+
+test_dirty_mergeable_discards_changes () {
+	git diff --cached --exit-code
 }
 
-setup_dirty_mergeable() {
+setup_dirty_mergeable () {
 	echo >file2 file2 &&
 	git add file2
 }
@@ -82,7 +108,7 @@ test_expect_success 'checkout -b to a new branch, set to an explicit ref' '
 
 test_expect_success 'checkout -b to a new branch with unmergeable changes fails' '
 	setup_dirty_unmergeable &&
-	test_must_fail do_checkout branch2 $HEAD1 &&
+	do_checkout ! branch2 $HEAD1 &&
 	test_dirty_unmergeable
 '
 
@@ -93,7 +119,7 @@ test_expect_success 'checkout -f -b to a new branch with unmergeable changes dis
 
 	# still dirty and on branch1
 	do_checkout branch2 $HEAD1 "-f -b" &&
-	test_must_fail test_dirty_unmergeable
+	test_dirty_unmergeable_discards_changes
 '
 
 test_expect_success 'checkout -b to a new branch preserves mergeable changes' '
@@ -111,12 +137,12 @@ test_expect_success 'checkout -f -b to a new branch with mergeable changes disca
 	test_when_finished git reset --hard HEAD &&
 	setup_dirty_mergeable &&
 	do_checkout branch2 $HEAD1 "-f -b" &&
-	test_must_fail test_dirty_mergeable
+	test_dirty_mergeable_discards_changes
 '
 
 test_expect_success 'checkout -b to an existing branch fails' '
 	test_when_finished git reset --hard HEAD &&
-	test_must_fail do_checkout branch2 $HEAD2
+	do_checkout ! branch2 $HEAD2
 '
 
 test_expect_success 'checkout -b to @{-1} fails with the right branch name' '
@@ -140,7 +166,8 @@ test_expect_success 'checkout -B to a merge base' '
 '
 
 test_expect_success 'checkout -B to an existing branch from detached HEAD resets branch to HEAD' '
-	git checkout $(git rev-parse --verify HEAD) &&
+	head=$(git rev-parse --verify HEAD) &&
+	git checkout "$head" &&
 
 	do_checkout branch2 "" -B
 '
@@ -155,14 +182,14 @@ test_expect_success 'checkout -B to an existing branch with unmergeable changes
 	git checkout branch1 &&
 
 	setup_dirty_unmergeable &&
-	test_must_fail do_checkout branch2 $HEAD1 -B &&
+	do_checkout ! branch2 $HEAD1 -B &&
 	test_dirty_unmergeable
 '
 
 test_expect_success 'checkout -f -B to an existing branch with unmergeable changes discards changes' '
 	# still dirty and on branch1
 	do_checkout branch2 $HEAD1 "-f -B" &&
-	test_must_fail test_dirty_unmergeable
+	test_dirty_unmergeable_discards_changes
 '
 
 test_expect_success 'checkout -B to an existing branch preserves mergeable changes' '
@@ -179,7 +206,7 @@ test_expect_success 'checkout -f -B to an existing branch with mergeable changes
 
 	setup_dirty_mergeable &&
 	do_checkout branch2 $HEAD1 "-f -B" &&
-	test_must_fail test_dirty_mergeable
+	test_dirty_mergeable_discards_changes
 '
 
 test_expect_success 'checkout -b <describe>' '

t/t3030-merge-recursive.sh

@@ -604,7 +604,7 @@ test_expect_success 'merge removes empty directories' '
 	git commit -mremoved-d/e &&
 	git checkout master &&
 	git merge -s recursive rm &&
-	test_must_fail test -d d
+	test_path_is_missing d
 '
 
 test_expect_success 'merge-recursive simple w/submodule' '

t/t3310-notes-merge-manual-resolve.sh

@@ -32,6 +32,12 @@ verify_notes () {
 	test_cmp "expect_log_$notes_ref" "output_log_$notes_ref"
 }
 
+notes_merge_files_gone () {
+	# No .git/NOTES_MERGE_* files left
+	{ ls .git/NOTES_MERGE_* >output || :; } &&
+	test_must_be_empty output
+}
+
 cat <<EOF | sort >expect_notes_x
 6e8e3febca3c2bb896704335cc4d0c34cb2f8715 $commit_sha4
 e5388c10860456ee60673025345fe2e153eb8cf8 $commit_sha3
@@ -335,9 +341,7 @@ EOF
 y and z notes on 4th commit
 EOF
 	git notes merge --commit &&
-	# No .git/NOTES_MERGE_* files left
-	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
-	test_must_be_empty output &&
+	notes_merge_files_gone &&
 	# Merge commit has pre-merge y and pre-merge z as parents
 	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
 	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
@@ -397,9 +401,7 @@ test_expect_success 'redo merge of z into m (== y) with default ("manual") resol
 
 test_expect_success 'abort notes merge' '
 	git notes merge --abort &&
-	# No .git/NOTES_MERGE_* files left
-	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
-	test_must_be_empty output &&
+	notes_merge_files_gone &&
 	# m has not moved (still == y)
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)" &&
 	# Verify that other notes refs has not changed (w, x, y and z)
@@ -464,9 +466,7 @@ EOF
 	echo "new note on 5th commit" > .git/NOTES_MERGE_WORKTREE/$commit_sha5 &&
 	# Finalize merge
 	git notes merge --commit &&
-	# No .git/NOTES_MERGE_* files left
-	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
-	test_must_be_empty output &&
+	notes_merge_files_gone &&
 	# Merge commit has pre-merge y and pre-merge z as parents
 	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
 	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
@@ -553,9 +553,7 @@ EOF
 
 test_expect_success 'resolve situation by aborting the notes merge' '
 	git notes merge --abort &&
-	# No .git/NOTES_MERGE_* files left
-	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
-	test_must_be_empty output &&
+	notes_merge_files_gone &&
 	# m has not moved (still == w)
 	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)" &&
 	# Verify that other notes refs has not changed (w, x, y and z)

t/t3415-rebase-autosquash.sh

@@ -25,6 +25,13 @@ test_expect_success setup '
 '
 
 test_auto_fixup () {
+	no_squash= &&
+	if test "x$1" = 'x!'
+	then
+		no_squash=true
+		shift
+	fi &&
+
 	git reset --hard base &&
 	echo 1 >file1 &&
 	git add -u &&
@@ -35,10 +42,19 @@ test_auto_fixup () {
 	test_tick &&
 	git rebase $2 -i HEAD^^^ &&
 	git log --oneline >actual &&
-	test_line_count = 3 actual &&
-	git diff --exit-code $1 &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 1 = $(git cat-file commit HEAD^ | grep first | wc -l)
+	if test -n "$no_squash"
+	then
+		test_line_count = 4 actual
+	else
+		test_line_count = 3 actual &&
+		git diff --exit-code $1 &&
+		echo 1 >expect &&
+		git cat-file blob HEAD^:file1 >actual &&
+		test_cmp expect actual &&
+		git cat-file commit HEAD^ >commit &&
+		grep first commit >actual &&
+		test_line_count = 1 actual
+	fi
 }
 
 test_expect_success 'auto fixup (option)' '
@@ -48,12 +64,19 @@ test_expect_success 'auto fixup (option)' '
 test_expect_success 'auto fixup (config)' '
 	git config rebase.autosquash true &&
 	test_auto_fixup final-fixup-config-true &&
-	test_must_fail test_auto_fixup fixup-config-true-no --no-autosquash &&
+	test_auto_fixup ! fixup-config-true-no --no-autosquash &&
 	git config rebase.autosquash false &&
-	test_must_fail test_auto_fixup final-fixup-config-false
+	test_auto_fixup ! final-fixup-config-false
 '
 
 test_auto_squash () {
+	no_squash= &&
+	if test "x$1" = 'x!'
+	then
+		no_squash=true
+		shift
+	fi &&
+
 	git reset --hard base &&
 	echo 1 >file1 &&
 	git add -u &&
@@ -64,10 +87,19 @@ test_auto_squash () {
 	test_tick &&
 	git rebase $2 -i HEAD^^^ &&
 	git log --oneline >actual &&
-	test_line_count = 3 actual &&
-	git diff --exit-code $1 &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 2 = $(git cat-file commit HEAD^ | grep first | wc -l)
+	if test -n "$no_squash"
+	then
+		test_line_count = 4 actual
+	else
+		test_line_count = 3 actual &&
+		git diff --exit-code $1 &&
+		echo 1 >expect &&
+		git cat-file blob HEAD^:file1 >actual &&
+		test_cmp expect actual &&
+		git cat-file commit HEAD^ >commit &&
+		grep first commit >actual &&
+		test_line_count = 2 actual
+	fi
 }
 
 test_expect_success 'auto squash (option)' '
@@ -77,9 +109,9 @@ test_expect_success 'auto squash (option)' '
 test_expect_success 'auto squash (config)' '
 	git config rebase.autosquash true &&
 	test_auto_squash final-squash-config-true &&
-	test_must_fail test_auto_squash squash-config-true-no --no-autosquash &&
+	test_auto_squash ! squash-config-true-no --no-autosquash &&
 	git config rebase.autosquash false &&
-	test_must_fail test_auto_squash final-squash-config-false
+	test_auto_squash ! final-squash-config-false
 '
 
 test_expect_success 'misspelled auto squash' '
@@ -94,7 +126,8 @@ test_expect_success 'misspelled auto squash' '
 	git log --oneline >actual &&
 	test_line_count = 4 actual &&
 	git diff --exit-code final-missquash &&
-	test 0 = $(git rev-list final-missquash...HEAD | wc -l)
+	git rev-list final-missquash...HEAD >list &&
+	test_must_be_empty list
 '
 
 test_expect_success 'auto squash that matches 2 commits' '
@@ -113,9 +146,15 @@ test_expect_success 'auto squash that matches 2 commits' '
 	git log --oneline >actual &&
 	test_line_count = 4 actual &&
 	git diff --exit-code final-multisquash &&
-	test 1 = "$(git cat-file blob HEAD^^:file1)" &&
-	test 2 = $(git cat-file commit HEAD^^ | grep first | wc -l) &&
-	test 1 = $(git cat-file commit HEAD | grep first | wc -l)
+	echo 1 >expect &&
+	git cat-file blob HEAD^^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^^ >commit &&
+	grep first commit >actual &&
+	test_line_count = 2 actual &&
+	git cat-file commit HEAD >commit &&
+	grep first commit >actual &&
+	test_line_count = 1 actual
 '
 
 test_expect_success 'auto squash that matches a commit after the squash' '
@@ -134,25 +173,38 @@ test_expect_success 'auto squash that matches a commit after the squash' '
 	git log --oneline >actual &&
 	test_line_count = 5 actual &&
 	git diff --exit-code final-presquash &&
-	test 0 = "$(git cat-file blob HEAD^^:file1)" &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 1 = $(git cat-file commit HEAD | grep third | wc -l) &&
-	test 1 = $(git cat-file commit HEAD^ | grep third | wc -l)
+	echo 0 >expect &&
+	git cat-file blob HEAD^^:file1 >actual &&
+	test_cmp expect actual &&
+	echo 1 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD >commit &&
+	grep third commit >actual &&
+	test_line_count = 1 actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep third commit >actual &&
+	test_line_count = 1 actual
 '
 test_expect_success 'auto squash that matches a sha1' '
 	git reset --hard base &&
 	echo 1 >file1 &&
 	git add -u &&
 	test_tick &&
-	git commit -m "squash! $(git rev-parse --short HEAD^)" &&
+	oid=$(git rev-parse --short HEAD^) &&
+	git commit -m "squash! $oid" &&
 	git tag final-shasquash &&
 	test_tick &&
 	git rebase --autosquash -i HEAD^^^ &&
 	git log --oneline >actual &&
 	test_line_count = 3 actual &&
 	git diff --exit-code final-shasquash &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 1 = $(git cat-file commit HEAD^ | grep squash | wc -l)
+	echo 1 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep squash commit >actual &&
+	test_line_count = 1 actual
 '
 
 test_expect_success 'auto squash that matches longer sha1' '
@@ -160,15 +212,20 @@ test_expect_success 'auto squash that matches longer sha1' '
 	echo 1 >file1 &&
 	git add -u &&
 	test_tick &&
-	git commit -m "squash! $(git rev-parse --short=11 HEAD^)" &&
+	oid=$(git rev-parse --short=11 HEAD^) &&
+	git commit -m "squash! $oid" &&
 	git tag final-longshasquash &&
 	test_tick &&
 	git rebase --autosquash -i HEAD^^^ &&
 	git log --oneline >actual &&
 	test_line_count = 3 actual &&
 	git diff --exit-code final-longshasquash &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 1 = $(git cat-file commit HEAD^ | grep squash | wc -l)
+	echo 1 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep squash commit >actual &&
+	test_line_count = 1 actual
 '
 
 test_auto_commit_flags () {
@@ -183,8 +240,12 @@ test_auto_commit_flags () {
 	git log --oneline >actual &&
 	test_line_count = 3 actual &&
 	git diff --exit-code final-commit-$1 &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test $2 = $(git cat-file commit HEAD^ | grep first | wc -l)
+	echo 1 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep first commit >actual &&
+	test_line_count = $2 actual
 }
 
 test_expect_success 'use commit --fixup' '
@@ -210,11 +271,15 @@ test_auto_fixup_fixup () {
 	(
 		set_cat_todo_editor &&
 		test_must_fail git rebase --autosquash -i HEAD^^^^ >actual &&
+		head=$(git rev-parse --short HEAD) &&
+		parent1=$(git rev-parse --short HEAD^) &&
+		parent2=$(git rev-parse --short HEAD^^) &&
+		parent3=$(git rev-parse --short HEAD^^^) &&
 		cat >expected <<-EOF &&
-		pick $(git rev-parse --short HEAD^^^) first commit
-		$1 $(git rev-parse --short HEAD^) $1! first
-		$1 $(git rev-parse --short HEAD) $1! $2! first
-		pick $(git rev-parse --short HEAD^^) second commit
+		pick $parent3 first commit
+		$1 $parent1 $1! first
+		$1 $head $1! $2! first
+		pick $parent2 second commit
 		EOF
 		test_cmp expected actual
 	) &&
@@ -222,13 +287,17 @@ test_auto_fixup_fixup () {
 	git log --oneline >actual &&
 	test_line_count = 3 actual
 	git diff --exit-code "final-$1-$2" &&
-	test 2 = "$(git cat-file blob HEAD^:file1)" &&
+	echo 2 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep first commit >actual &&
 	if test "$1" = "fixup"
 	then
-		test 1 = $(git cat-file commit HEAD^ | grep first | wc -l)
+		test_line_count = 1 actual
 	elif test "$1" = "squash"
 	then
-		test 3 = $(git cat-file commit HEAD^ | grep first | wc -l)
+		test_line_count = 3 actual
 	else
 		false
 	fi
@@ -256,19 +325,25 @@ test_expect_success C_LOCALE_OUTPUT 'autosquash with custom inst format' '
 	echo 2 >file1 &&
 	git add -u &&
 	test_tick &&
-	git commit -m "squash! $(git rev-parse --short HEAD^)" &&
+	oid=$(git rev-parse --short HEAD^) &&
+	git commit -m "squash! $oid" &&
 	echo 1 >file1 &&
 	git add -u &&
 	test_tick &&
-	git commit -m "squash! $(git log -n 1 --format=%s HEAD~2)" &&
+	subject=$(git log -n 1 --format=%s HEAD~2) &&
+	git commit -m "squash! $subject" &&
 	git tag final-squash-instFmt &&
 	test_tick &&
 	git rebase --autosquash -i HEAD~4 &&
 	git log --oneline >actual &&
 	test_line_count = 3 actual &&
 	git diff --exit-code final-squash-instFmt &&
-	test 1 = "$(git cat-file blob HEAD^:file1)" &&
-	test 2 = $(git cat-file commit HEAD^ | grep squash | wc -l)
+	echo 1 >expect &&
+	git cat-file blob HEAD^:file1 >actual &&
+	test_cmp expect actual &&
+	git cat-file commit HEAD^ >commit &&
+	grep squash commit >actual &&
+	test_line_count = 2 actual
 '
 
 test_expect_success 'autosquash with empty custom instructionFormat' '

t/t3419-rebase-patch-id.sh

@@ -80,7 +80,8 @@ do_tests () {
 		git commit -q -m "change big file again" &&
 		git checkout -q other^{} &&
 		git rebase master &&
-		test_must_fail test -n "$(git rev-list master...HEAD~)"
+		git rev-list master...HEAD~ >revs &&
+		test_must_be_empty revs
 	'
 
 	test_expect_success $pr 'do not drop patch' '

t/t3504-cherry-pick-rerere.sh

@@ -94,8 +94,10 @@ test_expect_success 'cherry-pick --rerere-autoupdate more than once' '
 
 test_expect_success 'cherry-pick conflict without rerere' '
 	test_config rerere.enabled false &&
-	test_must_fail git cherry-pick master &&
-	test_must_fail test_cmp expect foo
+	test_must_fail git cherry-pick foo-master &&
+	grep ===== foo &&
+	grep foo-dev foo &&
+	grep foo-master foo
 '
 
 test_done

t/t3507-cherry-pick-conflict.sh

@@ -168,7 +168,7 @@ test_expect_success 'successful final commit clears cherry-pick state' '
 	echo resolved >foo &&
 	test_path_is_file .git/sequencer/todo &&
 	git commit -a &&
-	test_must_fail test_path_exists .git/sequencer
+	test_path_is_missing .git/sequencer
 '
 
 test_expect_success 'reset after final pick clears cherry-pick state' '
@@ -178,7 +178,7 @@ test_expect_success 'reset after final pick clears cherry-pick state' '
 	echo resolved >foo &&
 	test_path_is_file .git/sequencer/todo &&
 	git reset &&
-	test_must_fail test_path_exists .git/sequencer
+	test_path_is_missing .git/sequencer
 '
 
 test_expect_success 'failed cherry-pick produces dirty index' '
@@ -381,23 +381,23 @@ test_expect_success 'failed commit does not clear REVERT_HEAD' '
 '
 
 test_expect_success 'successful final commit clears revert state' '
-       pristine_detach picked-signed &&
+	pristine_detach picked-signed &&
 
-       test_must_fail git revert picked-signed base &&
-       echo resolved >foo &&
-       test_path_is_file .git/sequencer/todo &&
-       git commit -a &&
-       test_must_fail test_path_exists .git/sequencer
+	test_must_fail git revert picked-signed base &&
+	echo resolved >foo &&
+	test_path_is_file .git/sequencer/todo &&
+	git commit -a &&
+	test_path_is_missing .git/sequencer
 '
 
 test_expect_success 'reset after final pick clears revert state' '
-       pristine_detach picked-signed &&
+	pristine_detach picked-signed &&
 
-       test_must_fail git revert picked-signed base &&
-       echo resolved >foo &&
-       test_path_is_file .git/sequencer/todo &&
-       git reset &&
-       test_must_fail test_path_exists .git/sequencer
+	test_must_fail git revert picked-signed base &&
+	echo resolved >foo &&
+	test_path_is_file .git/sequencer/todo &&
+	git reset &&
+	test_path_is_missing .git/sequencer
 '
 
 test_expect_success 'revert conflict, diff3 -m style' '

t/t4124-apply-ws-rule.sh

@@ -35,9 +35,15 @@ prepare_test_file () {
 }
 
 apply_patch () {
+	cmd_prefix= &&
+	if test "x$1" = 'x!'
+	then
+		cmd_prefix=test_must_fail &&
+		shift
+	fi &&
 	>target &&
 	sed -e "s|\([ab]\)/file|\1/target|" <patch |
-	git apply "$@"
+	$cmd_prefix git apply "$@"
 }
 
 test_fix () {
@@ -99,7 +105,7 @@ test_expect_success 'whitespace=warn, default rule' '
 
 test_expect_success 'whitespace=error-all, default rule' '
 
-	test_must_fail apply_patch --whitespace=error-all &&
+	apply_patch ! --whitespace=error-all &&
 	test_must_be_empty target
 
 '