Add test for conflict detection working

t/role_method_conflict_detection.t

@@ -0,0 +1,41 @@
+use strict;
+use warnings;
+{
+    package RoleOne;
+    use MooseX::MethodAttributes::Role;
+
+    sub foo {}
+}
+{
+    package RoleTwo;
+    use MooseX::MethodAttributes::Role;
+
+    sub foo {}
+}
+{
+    package RoleThree;
+    use MooseX::MethodAttributes::Role;
+
+    sub foo : Action {}
+}
+{
+    package RoleFour;
+    use MooseX::MethodAttributes::Role;
+
+    sub foo : ActionRole {}
+}
+{
+    package MyClass;
+    use Moose;
+    use Test::More tests => 3;
+    use Test::Exception;
+
+    throws_ok { with qw/RoleOne RoleTwo/; } qr/method name conflict/,
+        'Normal methods conflict detected';
+
+    throws_ok { with qw/RoleThree RoleFour/; } qr/method name conflict/,
+        'Attributed methods conflict detected';
+
+    throws_ok { with qw/RoleOne RoleFour/; } qr/method name conflict/,
+        'Attributed and non attributed methods combination - conflict detected';
+}