--- /dev/null
+use strict;
+use warnings;
+no warnings qw/once/;
+
+use Test::More;
+use lib qw(t/lib);
+use Scalar::Util; # load before we break require()
+
+use_ok 'DBIx::Class::Optional::Dependencies';
+
+my $sqlt_dep = DBIx::Class::Optional::Dependencies->req_list_for ('deploy');
+is_deeply (
+ [ keys %$sqlt_dep ],
+ [ 'SQL::Translator' ],
+ 'Correct deploy() dependency list',
+);
+
+# make module loading impossible, regardless of actual libpath contents
+@INC = (sub { die('Optional Dep Test') } );
+
+ok (
+ ! DBIx::Class::Optional::Dependencies->req_ok_for ('deploy'),
+ 'deploy() deps missing',
+);
+
+like (
+ DBIx::Class::Optional::Dependencies->req_missing_for ('deploy'),
+ qr/^SQL::Translator \>\= \d/,
+ 'expected missing string contents',
+);
+
+like (
+ DBIx::Class::Optional::Dependencies->req_errorlist_for ('deploy')->{'SQL::Translator'},
+ qr/Optional Dep Test/,
+ 'custom exception found in errorlist',
+);
+
+
+#make it so module appears loaded
+$INC{'SQL/Translator.pm'} = 1;
+$SQL::Translator::VERSION = 999;
+
+ok (
+ ! DBIx::Class::Optional::Dependencies->req_ok_for ('deploy'),
+ 'deploy() deps missing cached properly',
+);
+
+#reset cache
+%DBIx::Class::Optional::Dependencies::req_availability_cache = ();
+
+
+ok (
+ DBIx::Class::Optional::Dependencies->req_ok_for ('deploy'),
+ 'deploy() deps present',
+);
+
+is (
+ DBIx::Class::Optional::Dependencies->req_missing_for ('deploy'),
+ '',
+ 'expected null missing string',
+);
+
+is_deeply (
+ DBIx::Class::Optional::Dependencies->req_errorlist_for ('deploy'),
+ {},
+ 'expected empty errorlist',
+);
+
+
+done_testing;