for test incorrect
becuase :

```
	public function testSendRenderNoLayout() {
		$this>CakeEmail>reset();     // templite = defualt - layout = default
		$this>CakeEmail>transport('debug');

		$this>CakeEmail>from('cake@cakephp.org');
		$this>CakeEmail>to(array('you@cakephp.org' => 'You'));
		$this>CakeEmail>subject('My title');
		$this>CakeEmail>config(array('empty'));
		$this>CakeEmail>template('default', null);   
		$result = $this>CakeEmail>send('message body.');

		$this>assertContains('message body.', $result['message']);
		$this>assertNotContains('This email was sent using the CakePHP Framework', $result['message']);
	}
```

According to your view: layout is default
According to my changes: layout is default