1 files changed, 32 insertions, 0 deletions
diff --git a/t/pm/Utils.pl b/t/pm/Utils.pl
new file mode 100644
index 000000000..86ef29577
--- /dev/null
+++ b/t/pm/Utils.pl
@@ -0,0 +1,32 @@
+# Copyright (C) 2018  Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+use Automake::Utils;
+
+sub check_subst
+{
+  my @inputs = qw (AC_FOO AC_BAR AC_BAZ);
+  my @expected_outputs = map {
+    (my $exp = $_) =~ s/(.*)/\@$1\@/;
+    $exp;
+  } @inputs;
+
+  for my $i (0 .. $#inputs)
+    {
+      return 1 if (subst $inputs[$i]) ne $expected_outputs[$i];
+    }
+  return 0;
+}
+
+exit check_subst;