Fix adding stubs to class methods on mocked types

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Better handling of the `be(nil)` when used with value types. [#37](https://github.com/icy-arctic-fox/spectator/issues/37)
 - Fix missing arguments for stubbed top-level methods (`system`, `exit`, etc.). [#36](https://github.com/icy-arctic-fox/spectator/issues/36)
 - Fix outdated naming when using `expect_any_instance_of`.
+- Fix adding stubs to class methods on mocked types.
 
 ### Changed
 - Elegantly handle missing/undefined methods with `have_attributes` matcher.

src/spectator/mocks/registry.cr

@@ -21,6 +21,10 @@ module Spectator::Mocks
       fetch_instance(object).stubs.unshift(stub)
     end
 
+    def add_stub(type : T.class, stub : MethodStub) : Nil forall T
+      add_type_stub(type, stub)
+    end
+
     def add_type_stub(type, stub : MethodStub) : Nil
       fetch_type(type).stubs.unshift(stub)
     end