t7411: check configuration parsing errors

Check for configuration parsing errors in '.gitmodules' in t7411, which
is explicitly testing the submodule-config subsystem, instead of in
t7400.  Also explicitly use the test helper instead of relying on the
gitmodules file from being read in status.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7400-submodule-basic.sh

@@ -46,16 +46,6 @@ test_expect_success 'submodule update aborts on missing gitmodules url' '
 	test_must_fail git submodule init
 '
 
-test_expect_success 'configuration parsing' '
-	test_when_finished "rm -f .gitmodules" &&
-	cat >.gitmodules <<-\EOF &&
-	[submodule "s"]
-		path
-		ignore
-	EOF
-	test_must_fail git status
-'
-
 test_expect_success 'setup - repository in init subdirectory' '
 	mkdir init &&
 	(

t/t7411-submodule-config.sh

@@ -31,6 +31,21 @@ test_expect_success 'submodule config cache setup' '
 	)
 '
 
+test_expect_success 'configuration parsing with error' '
+	test_when_finished "rm -rf repo" &&
+	test_create_repo repo &&
+	cat >repo/.gitmodules <<-\EOF &&
+	[submodule "s"]
+		path
+		ignore
+	EOF
+	(
+		cd repo &&
+		test_must_fail test-submodule-config "" s 2>actual &&
+		test_i18ngrep "bad config" actual
+	)
+'
+
 cat >super/expect <<EOF
 Submodule name: 'a' for path 'a'
 Submodule name: 'a' for path 'b'