Fixed inline image issue. Added new tests.

.gitignore

@@ -8,3 +8,4 @@ build
 composer.lock
 nbproject/*
 .idea
+phpunit.phar

src/Mailgun/Connection/RestClient.php

@@ -119,8 +119,10 @@ public function post($endpointUrl, array $postData = [], $files = [])
         foreach ($fields as $fieldName) {
             if (isset($files[$fieldName])) {
                 if (is_array($files[$fieldName])) {
+                    $fileIndex = 0;
                     foreach ($files[$fieldName] as $file) {
-                        $postFiles[] = $this->prepareFile($fieldName, $file);
+                        $postFiles[] = $this->prepareFile($fieldName, $file, $fileIndex);
+                        $fileIndex++;
                     }
                 } else {
                     $postFiles[] = $this->prepareFile($fieldName, $files[$fieldName]);
@@ -251,10 +253,11 @@ protected function getResponseExceptionMessage(ResponseInterface $responseObj)
      *
      * @param string       $fieldName
      * @param string|array $filePath
+     * @param integer      $fileIndex
      *
      * @return array
      */
-    protected function prepareFile($fieldName, $filePath)
+    protected function prepareFile($fieldName, $filePath, $fileIndex=0)
     {
         $filename = null;
         // Backward compatibility code
@@ -268,6 +271,9 @@ protected function prepareFile($fieldName, $filePath)
             $filePath = substr($filePath, 1);
         }
 
+        // Add index for multiple file support
+        $fieldName .= '[' . $fileIndex . ']';
+
         return [
             'name'     => $fieldName,
             'contents' => fopen($filePath, 'r'),

tests/Mailgun/Tests/Messages/ComplexMessageTest.php

@@ -0,0 +1,111 @@
+<?PHP
+
+namespace Mailgun\Tests\Messages;
+
+use Mailgun\Tests\Mock\Mailgun;
+use Mailgun\Connection\RestClient;
+
+
+class mockRestClient extends RestClient{
+  public function send($method, $uri, $body = null, $files = [], array $headers = [])
+  {
+      $result = new \stdClass;
+
+      $result->method = $method;
+      $result->uri = $uri;
+      $result->body = $body;
+      $result->files = $files;
+      $result->headers = $headers;
+
+      return $result;
+  }
+}
+
+class mockMailgun extends Mailgun{
+  public function __construct(
+      $apiKey = null,
+      HttpClient $httpClient = null,
+      $apiEndpoint = 'api.mailgun.net'
+  ) {
+      $this->apiKey = $apiKey;
+      $this->restClient = new mockRestClient($apiKey, $apiEndpoint, $httpClient);
+  }
+}
+
+class ComplexMessageTest extends \Mailgun\Tests\MailgunTestCase
+{
+    private $client;
+    private $sampleDomain = 'samples.mailgun.org';
+
+    public function setUp()
+    {
+        $this->client = new mockMailgun('My-Super-Awesome-API-Key');
+    }
+
+    public function testSendComplexMessage()
+    {
+
+        $message = [
+          'to' => 'test@test.mailgun.org',
+          'from'    => 'sender@test.mailgun.org',
+          'subject' => 'This is my test subject',
+          'text'    => 'Testing!'
+        ];
+
+        $files = [
+            'inline' => [
+              [
+                'remoteName'=> 'mailgun_icon1.png',
+                'filePath' => 'tests/Mailgun/Tests/TestAssets/mailgun_icon1.png'
+              ],
+              [
+                'remoteName'=> 'mailgun_icon2.png',
+                'filePath' => 'tests/Mailgun/Tests/TestAssets/mailgun_icon2.png'
+              ]
+            ]
+        ];
+
+        $result = $this->client->sendMessage('test.mailgun.org', $message, $files);
+
+        $this->assertEquals('POST', $result->method);
+        $this->assertEquals('test.mailgun.org/messages', $result->uri);
+        $this->assertEquals([], $result->body);
+
+        // Start a counter, make sure all files are asserted
+        $testCount = 0;
+
+        foreach($result->files as $file){
+          if ($file['name'] == 'to'){
+            $this->assertEquals($file['contents'], 'test@test.mailgun.org');
+            $testCount++;
+          }
+          if ($file['name'] == 'from'){
+            $this->assertEquals($file['contents'], 'sender@test.mailgun.org');
+            $testCount++;
+          }
+          if ($file['name'] == 'subject'){
+            $this->assertEquals($file['contents'], 'This is my test subject');
+            $testCount++;
+          }
+          if ($file['name'] == 'text'){
+            $this->assertEquals($file['contents'], 'Testing!');
+            $testCount++;
+          }
+          if ($file['name'] == 'inline[0]'){
+            $this->assertEquals($file['filename'], 'mailgun_icon1.png');
+            $testCount++;
+          }
+          if ($file['name'] == 'inline[1]'){
+            $this->assertEquals($file['filename'], 'mailgun_icon2.png');
+            $testCount++;
+          }
+        }
+
+        // Make sure all "files" are asserted
+        $this->assertEquals(count($result->files), $testCount);
+
+        $this->assertEquals([], $result->body);
+        $this->assertEquals([], $result->headers);
+
+    }
+}