public function testDoesNotOverwriteExistingHeaderForUrlencoded()
 {
     $m = new Request('POST', 'http://foo.com', ['content-type' => 'application/x-www-form-urlencoded; charset=utf-8']);
     $b = new PostBody();
     $b->setField('foo', 'bar');
     $b->applyRequestHeaders($m);
     $this->assertEquals('application/x-www-form-urlencoded; charset=utf-8', $m->getHeader('Content-Type'));
 }
 /**
  * Apply POST fields and files to a request to attempt to give an accurate
  * representation.
  *
  * @param RequestInterface $request Request to update
  * @param array            $body    Body to apply
  */
 protected function addPostData(RequestInterface $request, array $body)
 {
     static $fields = ['string' => true, 'array' => true, 'NULL' => true, 'boolean' => true, 'double' => true, 'integer' => true];
     $post = new PostBody();
     foreach ($body as $key => $value) {
         if (isset($fields[gettype($value)])) {
             $post->setField($key, $value);
         } elseif ($value instanceof PostFileInterface) {
             $post->addFile($value);
         } else {
             $post->addFile(new PostFile($key, $value));
         }
     }
     if ($request->getHeader('Content-Type') == 'multipart/form-data') {
         $post->forceMultipartUpload(true);
     }
     $request->setBody($post);
 }