Allow for blank BCC's

Signed-off-by: Dave Hoover <dave.hoover@gmail.com>

lib/mad_mimi_mailer.rb

@@ -43,7 +43,7 @@ def call_api!(mail, method)
           'promotion_name' => method.to_s.sub(/^mimi_/, ''),
           'recipients' =>     serialize(mail.recipients),
           'subject' =>        mail.subject,
-          'bcc' =>            serialize(mail.bcc),
+          'bcc' =>            mail.bcc.present? ? serialize(mail.bcc) : '',
           'from' =>           mail.from,
           'body' =>           mail.body.to_yaml
         )       

test/mad_mimi_mailer_test.rb

@@ -17,6 +17,13 @@ def mimi_hello(greeting)
     bcc ["Gregg Pollack <gregg@example.com>", "David Clymer <david@example>"]
     body :message => greeting
   end
+
+  def mimi_hello_sans_bcc(greeting)
+    subject greeting
+    recipients "tyler@obtiva.com"
+    from "dave@obtiva.com"
+    body :message => greeting
+  end
 end
 
 class TestMadMimiMailer < Test::Unit::TestCase
@@ -39,6 +46,24 @@ def test_happy_path
     MadMimiMailer.deliver_mimi_hello("welcome to mad mimi")
   end
 
+  def test_blank_bcc
+    mock_request = mock("request")
+    mock_request.expects(:set_form_data).with(
+      'username' => "testy@mctestin.com",
+      'api_key' =>  "w00tb4r",
+      'promotion_name' => "hello_sans_bcc",
+      'recipients' =>     "tyler@obtiva.com",
+      'bcc' =>            "",
+      'subject' =>        "welcome to mad mimi",
+      'from' =>           "dave@obtiva.com",
+      'body' =>           "--- \n:message: welcome to mad mimi\n"
+    )
+    response = Net::HTTPSuccess.new("1.2", '200', 'OK')
+    MadMimiMailer.expects(:post_request).yields(mock_request).returns(response)    
+
+    MadMimiMailer.deliver_mimi_hello_sans_bcc("welcome to mad mimi")
+  end
+
   def test_bad_promotion_name
     mock_request = mock("request")
     mock_request.stubs(:set_form_data)