1 files changed, 21 insertions, 1 deletions
diff --git a/qa/qa/runtime/scenario.rb b/qa/qa/runtime/scenario.rb
index 0c5e9787e17..7ef59046640 100644
--- a/qa/qa/runtime/scenario.rb
+++ b/qa/qa/runtime/scenario.rb
@@ -1,8 +1,28 @@
 module QA
   module Runtime
+    ##
+    # Singleton approach to global test scenario arguments.
+    #
     module Scenario
       extend self
-      attr_accessor :mattermost
+
+      attr_reader :attributes
+
+      def define(attribute, value)
+        (@attributes ||= {}).store(attribute.to_sym, value)
+
+        define_singleton_method(attribute) do
+          @attributes[attribute.to_sym].tap do |value|
+            if value.to_s.empty?
+              raise ArgumentError, "Empty `#{attribute}` attribute!"
+            end
+          end
+        end
+      end
+
+      def method_missing(name, *)
+        raise ArgumentError, "Scenario attribute `#{name}` not defined!"
+      end
     end
   end
 end