mktag tests: parse out options in helper

Change check_verify_failure() helper to parse out options from
$@. This makes it easier to add new options in the future. See
06ce79152b (mktag: add a --[no-]strict option, 2021-01-06) for the
initial implementation.

Let's also replace "" quotes with '' for the test body, the varables
we need are eval'd into the body, so there's no need for the quoting
confusion.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3800-mktag.sh

@@ -12,15 +12,29 @@ test_description='git mktag: tag object verify test'
 # given in the expect.pat file.
 
 check_verify_failure () {
-	test_expect_success "$1" "
+	subject=$1 &&
-		test_must_fail git mktag <tag.sig 2>message &&
+	message=$2 &&
-		grep '$2' message &&
+	shift 2 &&
-		if test '$3' != '--no-strict'
+
+	no_strict= &&
+	while test $# != 0
+	do
+		case "$1" in
+		--no-strict)
+			no_strict=yes
+			;;
+		esac &&
+		shift
+	done &&
+
+	test_expect_success "fail with [--[no-]strict]: $subject" '
+		test_must_fail git mktag <tag.sig 2>err &&
+		if test -z "$no_strict"
 		then
-			test_must_fail git mktag --no-strict <tag.sig 2>message.no-strict &&
+			test_must_fail git mktag <tag.sig 2>err2 &&
-			grep '$2' message.no-strict
+			test_cmp err err2
 		fi
-	"
+	'
 }
 
 test_expect_mktag_success() {
@@ -243,7 +257,8 @@ tagger . <> 0 +0000
 EOF
 
 check_verify_failure 'verify tag-name check' \
-	'^error:.* badTagName:' '--no-strict'
+	'^error:.* badTagName:' \
+	--no-strict
 
 ############################################################
 # 11. tagger line label check #1
@@ -257,7 +272,8 @@ This is filler
 EOF
 
 check_verify_failure '"tagger" line label check #1' \
-	'^error:.* missingTaggerEntry:' '--no-strict'
+	'^error:.* missingTaggerEntry:' \
+	--no-strict
 
 ############################################################
 # 12. tagger line label check #2
@@ -272,7 +288,8 @@ This is filler
 EOF
 
 check_verify_failure '"tagger" line label check #2' \
-	'^error:.* missingTaggerEntry:' '--no-strict'
+	'^error:.* missingTaggerEntry:' \
+	--no-strict
 
 ############################################################
 # 13. allow missing tag author name like fsck
@@ -301,7 +318,8 @@ tagger T A Gger <
 EOF
 
 check_verify_failure 'disallow malformed tagger' \
-	'^error:.* badEmail:' '--no-strict'
+	'^error:.* badEmail:' \
+	--no-strict
 
 ############################################################
 # 15. allow empty tag email
@@ -425,7 +443,8 @@ this line should not be here
 EOF
 
 check_verify_failure 'detect invalid header entry' \
-	'^error:.* extraHeaderEntry:' '--no-strict'
+	'^error:.* extraHeaderEntry:' \
+	--no-strict
 
 test_expect_success 'invalid header entry config & fsck' '
 	test_must_fail git mktag <tag.sig &&