Use RSpec matchers for checking whether a class including Broadcast::…

…Publishable responds to methods. Beats me why I did not do it in the first place.

spec/lib/broadcast/publishable_spec.rb

@@ -5,7 +5,7 @@ class ClassToBecomeMessage
 
   attr_accessor :something
 
-  def initialize(somthng)
+  def initialize(somthng = nil)
     self.something = somthng
   end
 
@@ -16,33 +16,36 @@ def initialize(somthng)
   describe "in class scope" do
 
     it "should add the media accessor" do
-      ClassToBecomeMessage.methods.should include('media')
-      ClassToBecomeMessage.methods.should include('media=')
+      ClassToBecomeMessage.should respond_to(:media)
+      ClassToBecomeMessage.should respond_to(:media=)
     end
 
     it "should add the medium method" do
-      ClassToBecomeMessage.methods.should include('medium')
+      ClassToBecomeMessage.should respond_to(:medium)
     end
 
   end
 
   describe "in instance scope" do
 
+    before {
+      @instance = ClassToBecomeMessage.new(123)
+    }
     it "should add the publish method" do
-      ClassToBecomeMessage.public_instance_methods.should include('publish')
+      @instance.should respond_to(:publish)
     end
 
     it "should add the subject method" do
-      ClassToBecomeMessage.public_instance_methods.should include('subject')
+      @instance.should respond_to(:subject)
     end
 
     it "should add the body method" do
-      ClassToBecomeMessage.public_instance_methods.should include('body')
+      @instance.should respond_to(:body)
     end
 
     it "should not add the options accessor" do
-      ClassToBecomeMessage.public_instance_methods.should_not include('options')
-      ClassToBecomeMessage.public_instance_methods.should_not include('options=')
+      @instance.should_not respond_to(:options)
+      @instance.should_not respond_to(:options=)
     end
 
     it "should not mess with the initializer" do