Added basic explicit multipart rendering and tests

actionmailer/lib/action_mailer.rb

@@ -31,6 +31,7 @@ module ActionMailer
   extend ::ActiveSupport::Autoload
 
   autoload :AdvAttrAccessor
+  autoload :Collector
   autoload :Base
   autoload :DeliveryMethods
   autoload :DeprecatedApi

actionmailer/lib/action_mailer/base.rb

@@ -297,8 +297,9 @@ class Base < AbstractController::Base
     self.default_implicit_parts_order = [ "text/plain", "text/enriched", "text/html" ]
 
     # Expose the internal Mail message
+    # TODO: Make this an _internal ivar? 
     attr_reader :message
-
+    
     def headers(args=nil)
       if args
         ActiveSupport::Deprecation.warn "headers(Hash) is deprecated, please do headers[key] = value instead", caller
@@ -413,12 +414,25 @@ def mail(headers = {})
       m.reply_to  ||= quote_address_if_necessary(headers[:reply_to], charset) if headers[:reply_to]
       m.date      ||= headers[:date]                                          if headers[:date]
 
-      if block_given?
-        # Do something
+      if headers[:body]
+        templates = [ActionView::Template::Text.new(headers[:body], format_for_text)]
+      elsif block_given?
+        collector = ActionMailer::Collector.new(self, {:charset => charset}) do
+          render action_name
+        end
+        yield collector
+
+        collector.responses.each do |response|
+          part = Mail::Part.new(response)
+          m.add_part(part)
+        end
+
       else
         # TODO Ensure that we don't need to pass I18n.locale as detail
         templates = self.class.template_root.find_all(action_name, {}, self.class.mailer_name)
-
+      end
+
+      if templates
         if templates.size == 1 && !m.has_attachments?
           content_type ||= templates[0].mime_type.to_s
           m.body = render_to_body(:_template => templates[0])
@@ -430,17 +444,17 @@ def mail(headers = {})
         else
           templates.each { |t| insert_part(m, t, charset) }
         end
-
-        content_type ||= (m.has_attachments? ? "multipart/mixed" : "multipart/alternate")
       end
 
+      content_type ||= (m.has_attachments? ? "multipart/mixed" : "multipart/alternate")
+
       # Check if the content_type was not overwriten along the way and if so,
       # fallback to default.
       m.content_type = content_type || self.class.default_content_type.dup
       m.charset      = charset
       m.mime_version = mime_version
 
-      unless m.parts.empty?
+      if m.parts.present? && templates
         m.body.set_sort_order(headers[:parts_order] || self.class.default_implicit_parts_order.dup)
         m.body.sort_parts!
       end

actionmailer/lib/action_mailer/mail_helper.rb

@@ -18,7 +18,7 @@ def block_format(text)
 
     # Access the mailer instance.
     def mailer #:nodoc:
-      @controller
+      @_controller
     end
 
     # Access the message instance.

actionmailer/test/base_test.rb

@@ -69,6 +69,14 @@ def implicit_multipart(hash = {})
       attachments['invoice.pdf'] = 'This is test File content' if hash.delete(:attachments)
       mail(DEFAULT_HEADERS.merge(hash))
     end
+
+    def explicit_multipart(hash = {})
+      mail(DEFAULT_HEADERS.merge(hash)) do |format|
+        format.text { render :text => "TEXT Explicit Multipart" }
+        format.html { render :text => "HTML Explicit Multipart" }
+      end
+    end
+
   end
 
   test "method call to mail does not raise error" do
@@ -106,6 +114,11 @@ def implicit_multipart(hash = {})
     assert_equal("Welcome", email.body.encoded)
   end
 
+  test "can pass in :body to the mail method hash" do
+    email = BaseMailer.deliver_welcome(:body => "Hello there")
+    assert_equal("Hello there", email.body.encoded)
+  end
+
   # Custom headers
   test "custom headers" do
     email = BaseMailer.deliver_welcome
@@ -221,17 +234,49 @@ def implicit_multipart(hash = {})
     assert_equal("HTML Implicit Multipart", email.parts[1].parts[1].body.encoded)
   end
 
-  # TODO This should be fixed in mail. Sort parts should be recursive.
-  # test "implicit multipart with attachments and sort order" do
-  #   order = ["text/html", "text/plain"]
-  #   swap BaseMailer, :default_implicit_parts_order => order do
-  #     email = BaseMailer.deliver_implicit_multipart(:attachments => true)
-  #     assert_equal("application/pdf", email.parts[0].mime_type)
-  #     assert_equal("multipart/alternate", email.parts[1].mime_type)
-  #     assert_equal("text/plain", email.parts[1].parts[1].mime_type)
-  #     assert_equal("text/html", email.parts[1].parts[0].mime_type)
-  #   end
-  # end
+  test "implicit multipart with attachments and sort order" do
+    order = ["text/html", "text/plain"]
+    swap BaseMailer, :default_implicit_parts_order => order do
+      email = BaseMailer.deliver_implicit_multipart(:attachments => true)
+      assert_equal("application/pdf", email.parts[0].mime_type)
+      assert_equal("multipart/alternate", email.parts[1].mime_type)
+      assert_equal("text/plain", email.parts[1].parts[1].mime_type)
+      assert_equal("text/html", email.parts[1].parts[0].mime_type)
+    end
+  end
+
+  test "explicit multipart tests" do
+    email = BaseMailer.deliver_explicit_multipart
+    assert_equal(2, email.parts.size)
+    assert_equal("multipart/alternate", email.mime_type)
+    assert_equal("text/plain", email.parts[0].mime_type)
+    assert_equal("TEXT Explicit Multipart", email.parts[0].body.encoded)
+    assert_equal("text/html", email.parts[1].mime_type)
+    assert_equal("HTML Explicit Multipart", email.parts[1].body.encoded)
+  end
+
+  test "explicit multipart does not sort order" do
+    order = ["text/html", "text/plain"]
+    swap BaseMailer, :default_implicit_parts_order => order do
+      email = BaseMailer.deliver_explicit_multipart
+      assert_equal("text/plain", email.parts[0].mime_type)
+      assert_equal("text/html",  email.parts[1].mime_type)
+
+      email = BaseMailer.deliver_explicit_multipart(:parts_order => order.reverse)
+      assert_equal("text/plain", email.parts[0].mime_type)
+      assert_equal("text/html",  email.parts[1].mime_type)
+    end
+  end
+
+  #test "explicit multipart with attachments creates nested parts" do
+  #  email = BaseMailer.deliver_explicit_multipart(:attachments => true)
+  #  assert_equal("application/pdf", email.parts[0].mime_type)
+  #  assert_equal("multipart/alternate", email.parts[1].mime_type)
+  #  assert_equal("text/plain", email.parts[1].parts[0].mime_type)
+  #  assert_equal("TEXT Implicit Multipart", email.parts[1].parts[0].body.encoded)
+  #  assert_equal("text/html", email.parts[1].parts[1].mime_type)
+  #  assert_equal("HTML Implicit Multipart", email.parts[1].parts[1].body.encoded)
+  #end
 
   protected