Adding tests for #32

Also fixing headers not being forwarded via API.

Signed-off-by: Chris Hallgren <[email protected]>

.gitignore

@@ -1,3 +1,6 @@
 /composer.lock
 /phpunit.xml
 /vendor
+/.idea
+/.phpunit.result.cache
+/coverage

src/Mailer/Transport/MailgunTransport.php

@@ -436,6 +436,8 @@ protected function _processHeaders(Email $email)
                 }
             } elseif (0 === strpos($header, $this->_customHeaderPrefix) && !empty($value)) {
                 $this->_formData->add($header, $value);
+            } else {
+                $this->_formData->add($this->_customHeaderPrefix . $header, $value);
             }
         }
     }

tests/TestCase/Mailer/Transport/MailgunTransportTest.php

@@ -92,6 +92,10 @@ public function testAdditionalEmailAddresses()
             ->addCC(['[email protected]', '[email protected]' => 'John'])
             ->addBcc(['[email protected]', '[email protected]' => 'John'])
             ->setEmailFormat('both')
+            ->addHeaders([
+                'h:Reply-To' => '[email protected]',
+                'Sent-From' => '[email protected]',
+            ])
             ->setSubject('Email from CakePHP Mailgun plugin')
             ->send('Hello there, <br> This is an email from CakePHP Mailgun Email plugin.');
 
@@ -106,12 +110,16 @@ public function testAdditionalEmailAddresses()
         $this->assertTextContains('Content-Disposition: form-data; name="to"', $reqDataString);
         $this->assertTextContains('Content-Disposition: form-data; name="cc"', $reqDataString);
         $this->assertTextContains('Content-Disposition: form-data; name="bcc"', $reqDataString);
+        $this->assertTextContains('Content-Disposition: form-data; name="h:Reply-To"', $reqDataString);
+        $this->assertTextContains('Content-Disposition: form-data; name="h:Sent-From"', $reqDataString);
         $this->assertTextContains('[email protected] <[email protected]>', $reqDataString);
         $this->assertTextContains('[email protected] <[email protected]>', $reqDataString);
         $this->assertTextContains('[email protected] <[email protected]>', $reqDataString);
         $this->assertTextContains('John <[email protected]>', $reqDataString);
         $this->assertTextContains('[email protected] <[email protected]>', $reqDataString);
         $this->assertTextContains('John <[email protected]>', $reqDataString);
+        $this->assertTextContains('[email protected]', $reqDataString);
+        $this->assertTextContains('[email protected]', $reqDataString);
     }
 
     public function testAttachments()