/**
  * Test signing a blob
  */
 public function testGenerateSignatureBlob()
 {
     $credentials = new Microsoft_WindowsAzure_Credentials_SharedAccessSignature('myaccount', 'WXuEUKMijV/pxUu5/RhDn1bYRuFlLSbmLUJJWRqYQ/uxbMpEx+7S/jo9sT3ZIkEucZGbEafDuxD1kwFOXf3xyw==', false);
     $result = $credentials->createSignature(
         'pictures/blob.txt',
         'b',
         'r',
         '2009-08-14T11:03:40Z',
         '2009-08-14T11:53:40Z'
     );
     $this->assertEquals('hk78uZGGWd8B2NYoBwKSPs5gen3xYqsd3DPO8BQhgTU=', $result);
 }