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@@ -374,11 +374,16 @@ module ActionMailer #:nodoc:
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       alias_method :controller_name, :mailer_name
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       alias_method :controller_path, :mailer_name
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-      def method_missing(method_symbol, *parameters)#:nodoc:
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-        case method_symbol.id2name
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-          when /^create_([_a-z]\w*)/  then new($1, *parameters).mail
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-          when /^deliver_([_a-z]\w*)/ then new($1, *parameters).deliver!
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-          when "new" then nil
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+      def respond_to?(method_symbol, include_private = false) #:nodoc:
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+        matches_dynamic_method?(method_symbol) || super
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+      end
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+
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+      def method_missing(method_symbol, *parameters) #:nodoc:
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+        match = matches_dynamic_method?(method_symbol)
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+        case match[1]
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+          when 'create'  then new(match[2], *parameters).mail
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+          when 'deliver' then new(match[2], *parameters).deliver!
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+          when 'new'     then nil
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           else super
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         end
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       end
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@@ -424,6 +429,12 @@ module ActionMailer #:nodoc:
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       def template_root=(root)
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         self.view_paths = ActionView::Base.process_view_paths(root)
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       end
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+
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+      private
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+        def matches_dynamic_method?(method_name) #:nodoc:
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+          method_name = method_name.to_s
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+          /(create|deliver)_([_a-z]\w*)/.match(method_name) || /^(new)$/.match(method_name)
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+        end
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     end
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     # Instantiate a new mailer object. If +method_name+ is not +nil+, the mailer

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@@ -968,3 +968,55 @@ class MethodNamingTest < Test::Unit::TestCase
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     end
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   end
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 end
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+
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+class RespondToTest < Test::Unit::TestCase
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+  class RespondToMailer < ActionMailer::Base; end
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+
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+  def setup
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+    set_delivery_method :test
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+  end
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+
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+  def teardown
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+    restore_delivery_method
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+  end
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+
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+  def test_should_respond_to_new
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+    assert RespondToMailer.respond_to?(:new)
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+  end
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+
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+  def test_should_respond_to_create_with_template_suffix
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+    assert RespondToMailer.respond_to?(:create_any_old_template)
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+  end
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+
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+  def test_should_respond_to_deliver_with_template_suffix
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+    assert RespondToMailer.respond_to?(:deliver_any_old_template)
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+  end
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+
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+  def test_should_not_respond_to_new_with_template_suffix
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+    assert !RespondToMailer.respond_to?(:new_any_old_template)
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+  end
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+
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+  def test_should_not_respond_to_create_with_template_suffix_unless_it_is_separated_by_an_underscore
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+    assert !RespondToMailer.respond_to?(:createany_old_template)
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+  end
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+
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+  def test_should_not_respond_to_deliver_with_template_suffix_unless_it_is_separated_by_an_underscore
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+    assert !RespondToMailer.respond_to?(:deliverany_old_template)
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+  end
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+
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+  def test_should_not_respond_to_create_with_template_suffix_if_it_begins_with_a_uppercase_letter
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+    assert !RespondToMailer.respond_to?(:create_Any_old_template)
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+  end
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+
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+  def test_should_not_respond_to_deliver_with_template_suffix_if_it_begins_with_a_uppercase_letter
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+    assert !RespondToMailer.respond_to?(:deliver_Any_old_template)
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+  end
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+
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+  def test_should_not_respond_to_create_with_template_suffix_if_it_begins_with_a_digit
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+    assert !RespondToMailer.respond_to?(:create_1_template)
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+  end
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+
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+  def test_should_not_respond_to_deliver_with_template_suffix_if_it_begins_with_a_digit
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+    assert !RespondToMailer.respond_to?(:deliver_1_template)
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+  end
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+end