DSL only has a single app

Just makes more sense

lib/webcat/dsl.rb

@@ -2,6 +2,8 @@ module Webcat
   class << self
     attr_writer :default_driver, :current_driver
 
+    attr_accessor :app
+
     def default_driver
       @default_driver || :rack_test
     end
@@ -15,6 +17,12 @@ module Webcat
       @current_driver = nil 
     end
 
+    def current_session
+      session_pool["#{current_driver}#{app.object_id}"] ||= Webcat::Session.new(current_driver, app)
+    end
+
+  private
+
     def session_pool
       @session_pool ||= {}
     end
@@ -22,12 +30,6 @@ module Webcat
 
   extend(self)
 
-  attr_accessor :app
-
-  def current_session
-    driver = Webcat.current_driver
-    Webcat.session_pool["#{driver}#{app.object_id}"] ||= Webcat::Session.new(driver, app)
-  end
 
   SESSION_METHODS = [
     :visit, :body, :click_link, :click_button, :fill_in, :choose,
@@ -36,7 +38,7 @@ module Webcat
   SESSION_METHODS.each do |method|
     class_eval <<-RUBY, __FILE__, __LINE__+1
       def #{method}(*args, &block)
-        current_session.#{method}(*args, &block)
+        Webcat.current_session.#{method}(*args, &block)
       end
     RUBY
   end

spec/dsl_spec.rb

@@ -100,13 +100,9 @@ describe Webcat do
         include Webcat
       end
       foo = klass.new
-      foo.app = TestApp
       foo.visit('/with_html')
       foo.click_link('ullamco')
       foo.body.should include('Another World')
-      foo.app = proc { [200, {}, "Another Application"] }
-      foo.visit('/')
-      foo.body.should include('Another Application')
     end
   end