Returns true if a method for the action is available and can be dispatched, false otherwise.
Notice that action_methods.include?("foo") may return false and available_action?("foo") returns true because this method considers actions that are also available through other means, for example, implicit render ones.
action_name - The name of an action to be tested
# File actionpack/lib/abstract_controller/base.rb, line 162 def available_action?(action_name) method_for_action(action_name).present? end