fix http mocking

tests/FileSystemTest.php

@@ -7,6 +7,7 @@ use Pellicule\Models\Record;
 use Pellicule\Models\Media;
 use Pellicule\Providers\Electre;
 use Pellicule\Providers\Orb;
+use Pellicule\FileSystem;
 
 
 
@@ -18,9 +19,12 @@ class FileSystemTest extends TestCase {
     Media::setFileSystem(null);
 
     $this->_http_client
-      ->whenCalled('get')
+      ->whenCalled('sendRequest')
       ->answers($this->_forgePSR7Response(['content' => file_get_contents(realpath(dirname(__FILE__)) . '/' .'imagefullsize.jpg')]));
 
+    FileSystem::setDefaultHttpClient($this->_http_client);
+
+
     $this->fixture(Record::class,
                    ['id' => 1,
                     'isbn' => '2259228194',