Added SMS and MMS gateway that can handle a variety of messages formats along with a set of testes for it.

NOTE: this is the first patch submitted on ticket

test/unit/sms_gateway_test.rb

@@ -0,0 +1,51 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class SMSGatewayTest < Test::Rails::TestCase
+  fixtures :users, :contexts
+
+  def setup
+    @user = users(:sms_user)
+    @inbox = contexts(:inbox)
+  end
+
+  def load_message(filename)
+    SMSGateway.receive(File.read(File.join(RAILS_ROOT, 'test', 'fixtures', filename)))
+  end
+
+  def test_sms_with_no_subject
+    todo_count = Todo.count
+
+    load_message('sample_sms.txt')
+    # assert some stuff about it being created
+    assert_equal(todo_count+1, Todo.count)
+
+    message_todo = Todo.find(:first, :conditions => {:description => "This is a todo 4112093"})
+    assert_not_nil(message_todo)
+
+    assert_equal(@inbox, message_todo.context)
+    assert_equal(@user, message_todo.user)
+  end
+
+  def test_double_sms
+    todo_count = Todo.count
+    load_message('sample_sms.txt')
+    load_message('sample_sms.txt')
+    assert_equal(todo_count+1, Todo.count)
+  end
+
+  def test_mms_with_subject
+    todo_count = Todo.count
+
+    load_message('sample_mms.txt')
+
+    # assert some stuff about it being created
+    assert_equal(todo_count+1, Todo.count)
+
+    message_todo = Todo.find(:first, :conditions => {:description => "This is the subject"})
+    assert_not_nil(message_todo)
+
+    assert_equal(@inbox, message_todo.context)
+    assert_equal(@user, message_todo.user)
+    assert_equal("This is the message body", message_todo.notes)
+  end
+end