fix toUrl method

src/Plugin/Field/FieldFormatter/IslandoraImageFormatter.php

@@ -124,7 +124,7 @@ class IslandoraImageFormatter extends ImageFormatter {
       return $elements;
     }
 
-    $url = $node->toUrl()->toString();
+    $url = $node->toUrl();
 
     foreach ($elements as &$element) {
       $element['#url'] = $url;

tests/src/Functional/IslandoraImageFormatterTest.php

@@ -78,11 +78,12 @@ class IslandoraImageFormatterTest extends IslandoraFunctionalTestBase {
     // Assert that the image is rendered into html as a link pointing
     // to the Node, not the Media (that's what the islandora_image
     // formatter does).
+
     $elements = $this->xpath(
       '//a[@href=:path]/img[@src=:url and @alt=:alt and @title=:title]',
       [
         ':path' => $node->toUrl()->toString(),
-        ':url' => file_url_transform_relative(file_create_url($file->getFileUri())),
+        ':url' => $file->createFileUrl(),
         ':alt' => 'Some Alt',
         ':title' => 'Some Title',
       ]