function test_nullTOorCCorBCC()
{
$mail = new TestMailer();
$headers =& $mail->propRef('headers');
$headers['Bcc'] = NULL;
$headers['Cc'] = NULL;
$headers['To'] = NULL;
$header = $mail->prepareHeaders();
$this->assertEquals(0, preg_match('/(^|\\n)Bcc: (\\n|$)/', $header), 'Bcc found in headers.');
$this->assertEquals(0, preg_match('/(^|\\n)Cc: (\\n|$)/', $header), 'Cc found in headers.');
$this->assertEquals(0, preg_match('/(^|\\n)To: (\\n|$)/', $header), 'To found in headers.');
}
