attributes = [ 'name' => 'Tester', 'email' => 'tester@example.com', 'subject' => 'very important letter subject', 'body' => 'body of current message', ]; verify($model->sendEmail('admin@example.com'))->notEmpty(); // using Yii2 module actions to check email was sent $this->tester->seeEmailIsSent(); /** @var MessageInterface $emailMessage */ $emailMessage = $this->tester->grabLastSentEmail(); verify($emailMessage)->instanceOf('yii\mail\MessageInterface'); verify($emailMessage->getTo())->arrayHasKey('admin@example.com'); verify($emailMessage->getFrom())->arrayHasKey('noreply@example.com'); verify($emailMessage->getReplyTo())->arrayHasKey('tester@example.com'); verify($emailMessage->getSubject())->equals('very important letter subject'); verify($emailMessage->toString())->stringContainsString('body of current message'); } }