public function testGetBoundary()
{
$mail = new \r8\Mail($this->getTestTransport());
$boundary = $mail->getBoundary();
$this->assertType('string', $boundary);
$this->assertEquals(30, strlen($boundary));
$this->assertRegExp('/^\\=\\_[0-9a-zA-Z]{26}\\_\\=$/', $boundary);
// subsequent calls should be the same
$this->assertSame($boundary, $mail->getBoundary());
$this->assertSame($boundary, $mail->getBoundary());
$this->assertSame($boundary, $mail->getBoundary());
// Putting the boundary in the text should result in a change of the boundary
$mail->setText('string ' . $boundary . ' more data');
$newBoundary = $mail->getBoundary();
$this->assertNotSame($newBoundary, $boundary);
$this->assertSame($newBoundary, $mail->getBoundary());
$this->assertSame($newBoundary, $mail->getBoundary());
$this->assertSame($newBoundary, $mail->getBoundary());
}