public function testCreateFromBase64Data()
{
$data = "SGVsbG8gaSBhbSBhIHN0cmluZw==";
$attachment = Attachment::createFromBase64Data($data, "text/plain", 2);
$this->assertEquals("Hello i am a string", $attachment->getRawData());
$this->assertEquals($data, $attachment->getBase64EncodedData());
$this->assertEquals("text/plain", $attachment->getContentType());
$this->assertEquals(28, $attachment->getLength());
$this->assertEquals(2, $attachment->getRevPos());
}