change callable to Closure for php5 support. See #1 issue

Author: ddrv

src/Transport/FakeTransport.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 use Ddrv\Mailer\Message;
 use Ddrv\Mailer\TransportInterface;
@@ -27,7 +28,7 @@ public function send(Message $message)
         return true;
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/FileTransport.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 use Ddrv\Mailer\Message;
 use Ddrv\Mailer\TransportInterface;
@@ -52,7 +53,7 @@ public function send(Message $message)
         return true;
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/SendmailTransport.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 use Ddrv\Mailer\Message;
 use Ddrv\Mailer\TransportInterface;
@@ -47,7 +48,7 @@ public function send(Message $message)
         return mail($to, $subject, $body, $headers, $this->options);
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/Transport/SmtpTransport.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer\Transport;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 use Ddrv\Mailer\Message;
 use Ddrv\Mailer\TransportInterface;
@@ -81,9 +82,9 @@ public function send(Message $message)
     }
 
     /**
-     * @param callable $logger
+     * @param Closure $logger
      */
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

src/TransportInterface.php

@@ -2,6 +2,7 @@
 
 namespace Ddrv\Mailer;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 
 interface TransportInterface
@@ -17,9 +18,9 @@ interface TransportInterface
     public function send(Message $message);
 
     /**
-     * @param callable $logger
+     * @param Closure $logger
      * @return void
      */
-    public function setLogger(callable $logger);
+    public function setLogger(Closure $logger);
 }
 

tests/Support/Mock/Transport/MockTransport.php

@@ -2,6 +2,7 @@
 
 namespace Tests\Ddrv\Mailer\Support\Mock\Transport;
 
+use Closure;
 use Ddrv\Mailer\Exception\RecipientsListEmptyException;
 use Ddrv\Mailer\Message;
 use Ddrv\Mailer\TransportInterface;
@@ -32,7 +33,7 @@ public function send(Message $message)
         return true;
     }
 
-    public function setLogger(callable $logger)
+    public function setLogger(Closure $logger)
     {
         $this->logger = $logger;
     }

tests/Unit/MailerTest.php

@@ -32,6 +32,9 @@ public function setUp()
         parent::setUp();
         $this->factory = new MessageFactory();
         $this->transport = new MockTransport();
+        $this->transport->setLogger(function($log) {
+            echo $log.PHP_EOL.PHP_EOL.PHP_EOL.PHP_EOL;
+        });
         $this->mailer = new Mailer(new MemorySpool($this->transport));
     }