add test to assure RPM VERSION is up-to-date (#80)

t/packaging.t

@@ -0,0 +1,36 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+
+use Test::More;
+
+ok(my $qp_version = get_qp_version(), 'get_qp_version');
+ok(my $rpm_version = get_rpm_version(), "get_rpm_version");
+cmp_ok($rpm_version, 'eq', $qp_version, "RPM version is up-to-date");
+
+done_testing();
+
+sub get_qp_version {
+    my $rvfile = get_file_contents('lib/Qpsmtpd.pm')
+        or return;
+    my ($ver_line) = grep { $_ =~ /^our \$VERSION/ } @$rvfile;
+    my ($ver) = $ver_line =~ /"([0-9\.]+)"/;
+    return $ver;
+};
+
+sub get_rpm_version {
+    my $rvfile = get_file_contents('packaging/rpm/VERSION')
+        or return;
+    chomp @$rvfile;
+    return $rvfile->[0];
+}
+
+sub get_file_contents {
+    my $file = shift;
+    open my $fh, '<', $file or do {
+        warn "failed to open $file";
+        return;
+    };
+    my @r = <$fh>;
+    return \@r;
+};