/**
  * If the $url is a relative URL, will attempt to create
  * a full URL by prepending $this->baseURI to it.
  *
  * @param string $url
  *
  * @return string
  */
 protected function prepareURL(string $url) : string
 {
     // If it's a full URI, then we have nothing to do here...
     if (strpos($url, '://') !== false) {
         return $url;
     }
     $uri = $this->baseURI->resolveRelativeURI($url);
     return (string) $uri;
 }
 /**
  * @dataProvider defaultResolutions
  */
 public function testResolveRelativeURI($rel, $expected)
 {
     $base = 'http://a/b/c/d';
     $uri = new URI($base);
     $new = $uri->resolveRelativeURI($rel);
     $this->assertEquals($expected, (string) $new);
 }