public function testSetAttachments()
{
$expected = new AttachmentsOptions();
$this->assertSame($this->messageOptions, $this->messageOptions->setAttachments($expected));
$this->assertSame($expected, $this->messageOptions->getAttachments());
$this->messageOptions->setAttachments([]);
$this->assertInstanceOf('AcMailer\\Options\\AttachmentsOptions', $this->messageOptions->getAttachments());
}