[PATCH 2/3] [RFC] test_todo: allow [!] grep as the command

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From: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>

Many failing tests use grep, this commit converts a sample to use
test_todo(). As POSIX specifies that a return code greater than one
indicates an error rather than a failing match we take care not the
hide that.

Signed-off-by: Phillip Wood <phillip.wood@xxxxxxxxxxxxx>
---
 t/t0000-basic.sh                | 20 ++++++++++--
 t/t3510-cherry-pick-sequence.sh | 12 +++----
 t/t4014-format-patch.sh         | 20 ++++++------
 t/test-lib-functions.sh         | 56 ++++++++++++++++++++++++++++-----
 4 files changed, 82 insertions(+), 26 deletions(-)

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index 52362ad3dd3..db5c2059eb5 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -190,6 +190,14 @@ test_expect_success 'subtest: test_todo allowed arguments' '
 		"test_todo test_must_fail git --version"
 	test_expect_success "test_todo test_must_fail rejects bad command" \
 		"test_todo test_must_fail test_true"
+	test_expect_success "test_todo accepts grep" \
+		"echo a >a && test_todo grep b <a"
+	test_expect_success "test_todo accepts ! grep" \
+		"echo a >a && test_todo ! grep -v b <a"
+	test_expect_success "test_todo detects grep errors" \
+		"echo a >a && test_todo grep --invalid-option b <a"
+	test_expect_success "test_todo detects ! grep errors" \
+		"echo a >a && test_todo ! grep --invalid-option -v b <a"
 	test_done
 	EOF
 	check_sub_test_lib_test acceptable-test-todo <<-\EOF
@@ -199,9 +207,15 @@ test_expect_success 'subtest: test_todo allowed arguments' '
 	> not ok 3 - test_todo test_must_fail accepts good command # TODO known breakage
 	> not ok 4 - test_todo test_must_fail rejects bad command
 	> #	test_todo test_must_fail test_true
-	> # still have 2 known breakage(s)
-	> # failed 2 among remaining 2 test(s)
-	> 1..4
+	> not ok 5 - test_todo accepts grep # TODO known breakage
+	> not ok 6 - test_todo accepts ! grep # TODO known breakage
+	> not ok 7 - test_todo detects grep errors
+	> #	echo a >a && test_todo grep --invalid-option b <a
+	> not ok 8 - test_todo detects ! grep errors
+	> #	echo a >a && test_todo ! grep --invalid-option -v b <a
+	> # still have 4 known breakage(s)
+	> # failed 4 among remaining 4 test(s)
+	> 1..8
 	EOF
 '
 
diff --git a/t/t3510-cherry-pick-sequence.sh b/t/t3510-cherry-pick-sequence.sh
index 3b0fa66c33d..cd869255a2c 100755
--- a/t/t3510-cherry-pick-sequence.sh
+++ b/t/t3510-cherry-pick-sequence.sh
@@ -577,7 +577,7 @@ test_expect_success '--continue respects -x in first commit in multi-pick' '
 	grep "cherry picked from.*$picked" msg
 '
 
-test_expect_failure '--signoff is automatically propagated to resolved conflict' '
+test_expect_success '--signoff is automatically propagated to resolved conflict' '
 	pristine_detach initial &&
 	test_expect_code 1 git cherry-pick --signoff base..anotherpick &&
 	echo "c" >foo &&
@@ -591,11 +591,11 @@ test_expect_failure '--signoff is automatically propagated to resolved conflict'
 	git cat-file commit HEAD~3 >initial_msg &&
 	! grep "Signed-off-by:" initial_msg &&
 	grep "Signed-off-by:" unrelatedpick_msg &&
-	! grep "Signed-off-by:" picked_msg &&
+	test_todo ! grep "Signed-off-by:" picked_msg &&
 	grep "Signed-off-by:" anotherpick_msg
 '
 
-test_expect_failure '--signoff dropped for implicit commit of resolution, multi-pick case' '
+test_expect_success '--signoff dropped for implicit commit of resolution, multi-pick case' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick -s picked anotherpick &&
 	echo c >foo &&
@@ -605,10 +605,10 @@ test_expect_failure '--signoff dropped for implicit commit of resolution, multi-
 	git diff --exit-code HEAD &&
 	test_cmp_rev initial HEAD^^ &&
 	git cat-file commit HEAD^ >msg &&
-	! grep Signed-off-by: msg
+	test_todo ! grep Signed-off-by: msg
 '
 
-test_expect_failure 'sign-off needs to be reaffirmed after conflict resolution, single-pick case' '
+test_expect_success 'sign-off needs to be reaffirmed after conflict resolution, single-pick case' '
 	pristine_detach initial &&
 	test_must_fail git cherry-pick -s picked &&
 	echo c >foo &&
@@ -618,7 +618,7 @@ test_expect_failure 'sign-off needs to be reaffirmed after conflict resolution,
 	git diff --exit-code HEAD &&
 	test_cmp_rev initial HEAD^ &&
 	git cat-file commit HEAD >msg &&
-	! grep Signed-off-by: msg
+	test_todo ! grep Signed-off-by: msg
 '
 
 test_expect_success 'malformed instruction sheet 1' '
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index ad5c0292794..ab649bf27e5 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -165,12 +165,12 @@ test_expect_success 'additional command line cc (ascii)' '
 	grep "^ *S E Cipient <scipient@xxxxxxxxxxx>\$" hdrs5
 '
 
-test_expect_failure 'additional command line cc (rfc822)' '
+test_expect_success 'additional command line cc (rfc822)' '
 	git config --replace-all format.headers "Cc: R E Cipient <rcipient@xxxxxxxxxxx>" &&
 	git format-patch --cc="S. E. Cipient <scipient@xxxxxxxxxxx>" --stdout main..side >patch5 &&
 	sed -e "/^\$/q" patch5 >hdrs5 &&
 	grep "^Cc: R E Cipient <rcipient@xxxxxxxxxxx>,\$" hdrs5 &&
-	grep "^ *\"S. E. Cipient\" <scipient@xxxxxxxxxxx>\$" hdrs5
+	test_todo grep "^ *\"S. E. Cipient\" <scipient@xxxxxxxxxxx>\$" hdrs5
 '
 
 test_expect_success 'command line headers' '
@@ -195,16 +195,16 @@ test_expect_success 'command line To: header (ascii)' '
 	grep "^To: R E Cipient <rcipient@xxxxxxxxxxx>\$" hdrs8
 '
 
-test_expect_failure 'command line To: header (rfc822)' '
+test_expect_success 'command line To: header (rfc822)' '
 	git format-patch --to="R. E. Cipient <rcipient@xxxxxxxxxxx>" --stdout main..side >patch8 &&
 	sed -e "/^\$/q" patch8 >hdrs8 &&
-	grep "^To: \"R. E. Cipient\" <rcipient@xxxxxxxxxxx>\$" hdrs8
+	test_todo grep "^To: \"R. E. Cipient\" <rcipient@xxxxxxxxxxx>\$" hdrs8
 '
 
-test_expect_failure 'command line To: header (rfc2047)' '
+test_expect_success 'command line To: header (rfc2047)' '
 	git format-patch --to="R Ä Cipient <rcipient@xxxxxxxxxxx>" --stdout main..side >patch8 &&
 	sed -e "/^\$/q" patch8 >hdrs8 &&
-	grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@xxxxxxxxxxx>\$" hdrs8
+	test_todo grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@xxxxxxxxxxx>\$" hdrs8
 '
 
 test_expect_success 'configuration To: header (ascii)' '
@@ -214,18 +214,18 @@ test_expect_success 'configuration To: header (ascii)' '
 	grep "^To: R E Cipient <rcipient@xxxxxxxxxxx>\$" hdrs9
 '
 
-test_expect_failure 'configuration To: header (rfc822)' '
+test_expect_success 'configuration To: header (rfc822)' '
 	git config format.to "R. E. Cipient <rcipient@xxxxxxxxxxx>" &&
 	git format-patch --stdout main..side >patch9 &&
 	sed -e "/^\$/q" patch9 >hdrs9 &&
-	grep "^To: \"R. E. Cipient\" <rcipient@xxxxxxxxxxx>\$" hdrs9
+	test_todo grep "^To: \"R. E. Cipient\" <rcipient@xxxxxxxxxxx>\$" hdrs9
 '
 
-test_expect_failure 'configuration To: header (rfc2047)' '
+test_expect_success 'configuration To: header (rfc2047)' '
 	git config format.to "R Ä Cipient <rcipient@xxxxxxxxxxx>" &&
 	git format-patch --stdout main..side >patch9 &&
 	sed -e "/^\$/q" patch9 >hdrs9 &&
-	grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@xxxxxxxxxxx>\$" hdrs9
+	test_todo grep "^To: =?UTF-8?q?R=20=C3=84=20Cipient?= <rcipient@xxxxxxxxxxx>\$" hdrs9
 '
 
 # check_patch <patch>: Verify that <patch> looks like a half-sane
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 8978709b231..aee10bd0706 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -1010,8 +1010,9 @@ list_contains () {
 # with env, the env and its corresponding variable settings will be
 # stripped before we we test the command being run.
 #
-# test_todo() allows any of the assertions beginning test_ such as
-# test_cmp in addition the commands allowed by test_must_fail().
+# test_todo() allows "grep" or any of the assertions beginning test_
+# such as test_cmp in addition the commands allowed by
+# test_must_fail().
 
 test_must_fail_acceptable () {
 	local name
@@ -1050,9 +1051,21 @@ test_must_fail_acceptable () {
 		fi
 		return 1
 		;;
-	test_*)
-		test "$name" = "todo"
-		return $?
+	grep|test_*)
+		if test "$name" = "todo"
+		then
+			test_todo_command_="$1"
+			return 0
+		fi
+		return 1
+		;;
+	'!')
+		if test "$name" = "todo" && test "$2" = "grep"
+		then
+			test_todo_command_=grep
+			return 0
+		fi
+		return 1
 		;;
 	*)
 		return 1
@@ -1061,6 +1074,7 @@ test_must_fail_acceptable () {
 }
 
 test_must_fail_helper () {
+	test_todo_command_=
 	test_must_fail_name_="$1"
 	shift
 	case "$1" in
@@ -1077,8 +1091,27 @@ test_must_fail_helper () {
 		echo >&7 "test_$test_must_fail_name_: only 'git' is allowed: $*"
 		return 1
 	fi
+	test_invert_exit_code_=
+	if test "$1" = "!"
+	then
+		test_invert_exit_code_=1
+		shift
+	fi
 	"$@" 2>&7
 	exit_code=$?
+	if test -n "$test_invert_exit_code_"
+	# We only invert the exit code of grep. An exit code greater
+	# than 1 indicates an error rather than a failed match so
+	# we only want to swap zero and one.
+	then
+		if test $exit_code -eq 0
+		then
+			exit_code=1
+		elif test $exit_code -eq 1
+		then
+			exit_code=0
+		fi
+	fi
 	if test $exit_code -eq 0 && ! list_contains "$_test_ok" success
 	then
 		echo >&4 "test_$test_must_fail_name_: command succeeded: $*"
@@ -1098,6 +1131,15 @@ test_must_fail_helper () {
 	then
 		echo >&4 "test_$test_must_fail_name_: valgrind error: $*"
 		return 1
+	else
+		case "$test_todo_command_" in
+		grep)
+			if test $exit_code -ne 1
+			then
+			       echo >&4 "test_todo: $test_todo_command_ error: $*"
+			       return 1
+			fi;;
+		esac
 	fi
 
 	return 0
@@ -1116,8 +1158,8 @@ test_must_fail_helper () {
 #	'
 #
 # This test will fail if "git foo" fails or err is unexpectedly empty.
-# test_todo can be used with "git" or any of the "test_*" assertions
-# such as test_cmp().
+# test_todo can be used with "git", "grep" or any of the "test_*"
+# assertions such as test_cmp().
 
 test_todo () {
 	if test "$test_todo_" = "test_expect_failure"
-- 
gitgitgadget




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