Merge pull request #26 from paneq/named_exception

Raise named exception when someone is trying to send event to unavailable

lib/apotomo/request_processor.rb

@@ -1,5 +1,8 @@
 module Apotomo
   class RequestProcessor
+
+    class InvalidSourceWidget < RuntimeError; end
+
     include Hooks
 
     define_hook :after_initialize
@@ -23,7 +26,7 @@ def attach_stateless_blocks_for(blocks, root, controller)
     # Called when the browser wants an url_for_event address. This fires the request event in 
     # the widget tree and collects the rendered page updates.
     def process_for(request_params)
-      source = self.root.find_widget(request_params[:source]) or raise "Source #{request_params[:source].inspect} non-existent."
+      source = self.root.find_widget(request_params[:source]) or raise InvalidSourceWidget, "Source #{request_params[:source].inspect} non-existent."
 
       source.fire(request_params[:type].to_sym, request_params) # set data to params for now.
 

test/unit/request_processor_test.rb

@@ -96,7 +96,7 @@ def squeak(evt); render :text => evt.data.inspect; end
     end
 
     should "raise an exception when :source is unknown" do
-      assert_raises RuntimeError do
+      assert_raises Apotomo::RequestProcessor::InvalidSourceWidget do
         @processor.process_for({:type => :squeak, :source => 'tom'})
       end
     end