fix: error sending messages

src/Mailer.php

@@ -79,11 +79,12 @@ protected function sendMessage($message)
     {
         Yii::info('Sending email', __METHOD__);
 
-        $this->getMailgun()->post("{$this->domain}/messages",
-            $message->getMessageBuilder()->getMessage(),
-            $message->getMessageBuilder()->getFiles());
+        $this->getMailgun()->messages()->send(
+            $this->domain,
+            $message->getMessageBuilder()->getMessage()
+        );
 
-         return true;
+        return true;
     }
 
     /**

src/Message.php

@@ -229,6 +229,16 @@ public function toString()
         return VarDumper::dumpAsString($this->getMessageBuilder()->getMessage());
     }
 
+    /**
+     * Sets whether the message in test mode.
+     * When you do this, Mailgun will accept the message but will not send it. This is useful for testing purposes.
+     */
+    public function setTestMode(bool $enabled): self {
+        $this->getMessageBuilder()->setTestMode($enabled);
+
+        return $this;
+    }
+
     /**
      * Creates the Mailgun message builder.
      * @return MessageBuilder message builder.

tests/MailerTest.php

@@ -23,7 +23,7 @@ protected function setUp(): void
         ]);
     }
 
-    public function testInitializesMailgun(): void
+    public function testGetMailgun(): void
     {
         $mailgun = Yii::$app->mailer->getMailgun();
         $this->assertInstanceOf(\Mailgun\Mailgun::class, $mailgun);

tests/MessageTest.php

@@ -16,18 +16,29 @@ protected function setUp(): void
             'components' => [
                 'mailer' => [
                     'class' => 'boundstate\mailgun\Mailer',
-                    'key' => 'key-example',
-                    'domain' => 'mg.example.com',
+                    'key' => '801b0ee9ba59f340019da1c62a9f31df-816b23ef-3007ca87',
+                    'domain' => 'sandbox475d21b1d2084dd5af26f3612111b476.mailgun.org',
                 ],
             ]
         ]);
     }
 
-    public function testHtmlMessage(): void
+    public function testCompose(): void
     {
         $message = Yii::$app->mailer->compose('example', ['name' => 'John']);
         $html = $message->getMessageBuilder()->getMessage()['html'];
 
         $this->assertEquals($html, '<p>Hi John!</p>');
     }
+
+    public function testSend(): void
+    {
+        $message = Yii::$app->mailer->compose('example', ['name' => 'John'])
+            ->setTo('[email protected]')
+            ->setFrom('[email protected]')
+            ->setSubject('Test')
+            ->setTestMode(true);
+
+        $this->assertTrue($message->send());
+    }
 }