Get contextual values working with doubles

src/spectator/double.cr

@@ -2,7 +2,13 @@ module Spectator
   abstract class Double
     macro stub(definition)
       def {{definition.name.id}}
-        {{definition.block.body}}
+        @internal.{{definition.name.id}}
+      end
+
+      class Internal
+        def {{definition.name.id}}
+          {{definition.block.body}}
+        end
       end
     end
   end

src/spectator/dsl/mocks.cr

@@ -3,9 +3,16 @@ require "../double"
 module Spectator::DSL
   macro double(name, &block)
     {% if block.is_a?(Nop) %}
-      Double{{name.id}}.new
+      Double{{name.id}}.new(@spectator_test_values)
     {% else %}
       class Double{{name.id}} < ::Spectator::Double
+        class Internal < {{@type.id}}
+        end
+
+        def initialize(test_values : ::Spectator::TestValues)
+          @internal = Internal.new(test_values)
+        end
+
         {{block.body}}
       end
     {% end %}