Make sure we can add resources with same name. Ie no overwrite

Author: Nyholm

src/MultipartStreamBuilder.php

@@ -76,7 +76,7 @@ public function addResource($name, $resource, array $options = [])
         }
 
         $this->prepareHeaders($name, $stream, $options['filename'], $options['headers']);
-        $this->data[$name] = ['contents' => $stream, 'headers' => $options['headers'], 'filename' => $options['filename']];
+        $this->data[] = ['contents' => $stream, 'headers' => $options['headers'], 'filename' => $options['filename']];
 
         return $this;
     }

tests/FunctionTest.php

@@ -101,6 +101,17 @@ public function testFormName()
         $this->assertTrue(false !== strpos($multipartStream, 'Content-Disposition: form-data; name="a-formname"'));
     }
 
+    public function testAddResourceWithSameName()
+    {
+        $builder = new MultipartStreamBuilder();
+        $builder->addResource('name', 'foo1234567890foo');
+        $builder->addResource('name', 'bar1234567890bar');
+
+        $multipartStream = (string) $builder->build();
+        $this->assertTrue(false !== strpos($multipartStream, 'bar1234567890bar'));
+        $this->assertTrue(false !== strpos($multipartStream, 'foo1234567890foo'), 'Using same name must not overwrite');
+    }
+
     public function testBoundary()
     {
         $boundary = 'SpecialBoundary';