public function testEmbedFile()
{
$message = new Message();
$fileName = __DIR__ . '/../test_image.png';
$cid = $message->embed($fileName);
$this->assertEquals('image_0', $cid);
$images = $message->getImages();
$this->assertCount(1, $images);
$image = $images[0];
$this->assertEquals($image['name'], 'test_image.png');
$this->assertEquals($image['type'], \yii\helpers\FileHelper::getMimeType($fileName));
$this->assertEquals($image['data'], base64_encode(file_get_contents($fileName)));
$cid1 = $message->embed($fileName);
$images = $message->getImages();
$this->assertEquals('image_1', $cid1);
$this->assertCount(2, $images);
}
