mail->fileTransportCallback = function ($mailer, $message) { return 'testing_message.eml'; }; } protected function tearDown() { unlink(Yii::getAlias(Yii::$app->mail->fileTransportPath) . '/testing_message.eml'); test::clean(); parent::tearDown(); } public function testContact() { test::double('app\models\ContactForm',['validate' => true]); $model = new ContactForm(); $model->attributes = [ 'name' => 'Tester', 'email' => 'tester@example.com', 'subject' => 'very important letter subject', 'body' => 'body of current message', ]; $model->contact('admin@example.com'); $this->specify('email should be send', function () { $this->assertFileExists($this->getMessageFile(), 'email file should exist'); }); $this->specify('message should contain correct data', function () use($model) { $emailMessage = file_get_contents($this->getMessageFile()); $this->assertContains($model->name, $emailMessage, 'email should contain user name'); $this->assertContains($model->email, $emailMessage, 'email should contain sender email'); $this->assertContains($model->subject, $emailMessage, 'email should contain subject'); $this->assertContains($model->body, $emailMessage, 'email should contain body'); }); } private function getMessageFile() { return Yii::getAlias(Yii::$app->mail->fileTransportPath) . '/testing_message.eml'; } }