mockApplication([ 'components' => [ 'mailer' => $this->createTestEmailComponent(), ], ]); } /** * @return Mailer test email component instance. */ protected function createTestEmailComponent() { $component = new TestMailer(); return $component; } /** * @return TestMailer mailer instance. */ protected function getMailer() { return Yii::$app->get('mailer'); } // Tests : public function testSend(): void { $mailer = $this->getMailer(); $message = $mailer->compose(); $message->send($mailer); $this->assertEquals($message, $mailer->sentMessages[0], 'Unable to send message!'); } public function testToString(): void { $mailer = $this->getMailer(); $message = $mailer->compose(); $this->assertEquals($message->toString(), '' . $message); } } /** * Test Mailer class. */ class TestMailer extends BaseMailer { public $messageClass = 'yiiunit\framework\mail\TestMessage'; public $sentMessages = []; protected function sendMessage($message) { $this->sentMessages[] = $message; } } /** * Test Message class. */ class TestMessage extends BaseMessage { public $text; public $html; public function getCharset() { return ''; } public function setCharset($charset): void { } public function getFrom() { return ''; } public function setFrom($from): void { } public function getReplyTo() { return ''; } public function setReplyTo($replyTo): void { } public function getTo() { return ''; } public function setTo($to): void { } public function getCc() { return ''; } public function setCc($cc): void { } public function getBcc() { return ''; } public function setBcc($bcc): void { } public function getSubject() { return ''; } public function setSubject($subject): void { } public function setTextBody($text): void { $this->text = $text; } public function setHtmlBody($html): void { $this->html = $html; } public function attachContent($content, array $options = []): void { } public function attach($fileName, array $options = []): void { } public function embed($fileName, array $options = []): void { } public function embedContent($content, array $options = []): void { } public function toString() { return static::class; } }