--- /dev/null
+#!perl
+
+use warnings;
+use strict;
+
+use Test::More;
+
+use File::Find;
+use PPI::Document;
+
+my %implied = (
+ # Universal
+ SUPER => 1,
+
+ 'Readonly::Scalar' => 'Readonly',
+ 'Readonly::Array' => 'Readonly',
+ 'Readonly::Hash' => 'Readonly',
+);
+
+
+my @pm;
+find(
+ {
+ wanted => sub { push @pm, $_ if m/\.pm \z/xms && !m/svn/xms },
+ no_chdir => 1,
+ },
+ 'lib'
+);
+plan tests => scalar @pm;
+
+for my $file (@pm) {
+ SKIP:
+ {
+ my $doc = PPI::Document->new($file) || die 'Failed to parse '.$file;
+
+ my @incs = @{$doc->find('PPI::Statement::Include') || []};
+ my %deps = map {$_->module => 1} grep {$_->type eq 'use' || $_->type eq 'require'} @incs;
+ my %thispkg = map {$_->namespace => 1} @{$doc->find('PPI::Statement::Package') || []};
+ my @pkgs = @{$doc->find('PPI::Token::Word')};
+ my %failed;
+
+ for my $pkg (@pkgs) {
+ my $name = "$pkg";
+ next if $name !~ m/::/xms;
+ next if $name =~ m/::_private::/xms;
+ next if $name =~ m/List::Util::[a-z]+/xms;
+
+ # subroutine declaration with absolute name?
+ # (bad form, but legal)
+ my $prev_sib = $pkg->sprevious_sibling;
+ next if ($prev_sib &&
+ $prev_sib eq 'sub' &&
+ !$prev_sib->sprevious_sibling &&
+ $pkg->parent->isa('PPI::Statement::Sub'));
+
+ my $token = $pkg->next_sibling;
+
+ if ($token =~ m/\A \(/xms) {
+ $name =~ s/::\w+\z//xms;
+ }
+
+ if ( !match($name, \%deps, \%thispkg) ) {
+ $failed{$name} = 1;
+ }
+ }
+
+ my @failures = sort keys %failed;
+ if (@failures) {
+ diag("found deps @{[sort keys %deps]}");
+ diag("Missed @failures");
+ }
+ ok(@failures == 0, $file);
+ }
+}
+
+sub match {
+ my $pkg = shift;
+ my $deps = shift;
+ my $thispkg = shift;
+
+ return 1 if $thispkg->{$pkg};
+ return 1 if $deps->{$pkg};
+ $pkg = $implied{$pkg};
+ return 0 if !defined $pkg;
+ return 1 if 1 eq $pkg;
+ return match($pkg, $deps, $thispkg);
+}
+
+#-----------------------------------------------------------------------------
+
+# ensure we run true if this test is loaded by
+# t/94_includes.t.t.without_optional_dependencies.t
+1;
+
+# Local Variables:
+# mode: cperl
+# cperl-indent-level: 4
+# fill-column: 78
+# indent-tabs-mode: nil
+# c-indentation-style: bsd
+# End:
+# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :