def METHOD_NAME(self):
    args = (' --subject This_is_a_test --from foo@bar.com'
            ' --to fie@baz.com --text This_is_the_message')
    args_list = (self.prefix + args).split()
    result = {
        'Source': 'foo@bar.com',
        'Destination': {'ToAddresses': ['fie@baz.com']},
        'Message': {'Body': {'Text': {'Data': 'This_is_the_message'}},
                    'Subject': {'Data': 'This_is_a_test'}}}
    self.assert_params_for_cmd(args_list, result)