--- /dev/null
+#!perl
+use strict;
+use warnings;
+use Test::More tests => 18;
+my $class = 'Module::Depends::Intrusive';
+require_ok("Module::Depends");
+require_ok($class);
+
+my $our_requires = {
+ 'Class::Accessor::Chained' => 0,
+ 'File::chdir' => 0,
+ 'File::Spec' => 0,
+ 'YAML' => 0,
+};
+
+# test against ourself
+my $mb = $class->new->dist_dir('t/old')->find_modules;
+is( $mb->error, '' );
+isa_ok( $mb, $class );
+
+is_deeply( $mb->requires, $our_requires, "got our own requires" );
+
+is_deeply(
+ $mb->build_requires,
+ { 'Test::More' => 0 },
+ "got our own build_requires"
+);
+
+my $other = $class->new->dist_dir("t/mmish")->find_modules;
+
+is_deeply(
+ $other->requires,
+ { 'Not::A::Real::Module' => 42 },
+ "got other (makemaker) requires"
+);
+
+my $notthere = $class->new->dist_dir('t/no-such-dir')->find_modules;
+like(
+ $notthere->error,
+ qr{^couldn't chdir to t/no-such-dir: },
+ "fails on not existing dir"
+);
+
+$notthere->dist_dir('t/empty')->find_modules;
+like(
+ $notthere->error,
+ qr{^No {Build,Makefile}.PL found },
+ "fails on empty dir"
+);
+
+my $versioned = $class->new->dist_dir('t/build_version')->find_modules;
+is_deeply(
+ $versioned->requires,
+ { 'Class::MethodMaker' => '1.02',
+ 'Term::ReadKey' => '2.14'
+ },
+ "use Module::Build VERSION; no longer trips us up"
+);
+
+### gah, it seems File::chdir's localisation doesn't nest, otherwise we could use that here
+chdir 't/old';
+my $shy = Module::Depends->new->dist_dir('.')->find_modules;
+chdir '../..';
+is_deeply( $shy->requires, $our_requires,
+ "got our own requires, non-intrusively" );
+
+my $distant = Module::Depends->new->dist_dir('t/with-yaml')->find_modules;
+is_deeply( $distant->requires, $our_requires,
+ "got our own requires, non-intrusively, from a distance" );
+
+my $inline_mm = $class->new->dist_dir('t/inline-makemaker')->find_modules;
+is_deeply(
+ $inline_mm->requires,
+ { 'Inline::C' => '0.44',
+ 'Time::Piece' => '1.08'
+ },
+ "use Inline::MakeMaker; no longer trips us up"
+);
+
+my $module_install = $class->new->dist_dir('t/module-install')->find_modules;
+is( $module_install->error, '', "Module::Install no go boom" );
+is_deeply(
+ $module_install->build_requires,
+ { 'Test::More' => '0.54' },
+ "Module::Install build_requires"
+);
+
+is_deeply(
+ $module_install->requires,
+ { 'perl' => '5.5.3' },
+ "Module::Install requires"
+);
+
+my $template_extract
+ = $class->new->dist_dir('t/template-extract')->find_modules;
+is_deeply(
+ $template_extract->requires,
+ { 'perl' => '5.006',
+ 'Template' => 2
+ },
+ "Template::Extract Module::Install requires"
+);
+
+my $findbin = $class->new->dist_dir('t/uses-findbin')->find_modules;
+is_deeply(
+ $findbin->requires,
+ { 'Not::A::Real::Module' => 42 },
+ "odd outcome use of FindBin"
+);