if method_missing accepts some method name patterns, then respod_to? …

…should return true for the same method names

lib/active_time.rb

@@ -1,5 +1,7 @@
 class ActiveTime
 
+  COLLECTION_METHOD_NAMES_PATTERN = /[a-z_]+s$/
+
   attr_accessor :starting, :ending
   alias_method :time, :starting
 
@@ -60,7 +62,7 @@ def range
   #
   # TODO: memoize the results, to avoid multiple queries for the same method call.
   def method_missing(method_name, *args)
-    if method_name.to_s =~ /[a-z_]+s$/
+    if method_name.to_s =~ COLLECTION_METHOD_NAMES_PATTERN
       args[0] ||= :created_at
       begin
         klass_name = method_name.to_s.singularize.classify
@@ -76,6 +78,12 @@ def method_missing(method_name, *args)
     end
   end
 
+  # If method_missing deals with these, respond_to should too.
+  def respond_to?(method_name)
+    return true if method_name.to_s =~ COLLECTION_METHOD_NAMES_PATTERN
+    super
+  end
+
   # Provides a human friendly string description of the date or time range being used.  Examples:
   #
   #   ActiveTime.new(2008)                      # => "in 2008"

test/active_time_test.rb

@@ -208,6 +208,13 @@ def ending
         assert_equal @object.starting, @object.time
       end
 
+      should "respond to methods named after collections of ActiveRecord objects" do
+        assert @object.respond_to?(:posts)
+        assert @object.respond_to?(:activity_events)
+        assert @object.respond_to?(:users)
+        assert @object.respond_to?(:summaries)
+      end
+
     end
 
   end