Fixed the responsive image field plugin and improvaed test coverage. (#353)

Author: blazeyo

modules/graphql_image/src/Plugin/GraphQL/Fields/ImageResponsive.php

@@ -73,7 +73,7 @@ protected function resolveValues($value, array $args, ResolveInfo $info) {
       $variables = [
         '#theme' => 'responsive_image',
         '#responsive_image_style_id' => $args['style'],
-        '#uri' => $value->uri,
+        '#uri' => $value->entity->getFileUri(),
       ];
 
       yield $this->renderer->renderRoot($variables);

modules/graphql_image/tests/src/Kernel/ImageFieldTest.php

@@ -128,7 +128,13 @@ public function testImageField() {
     $this->assertEquals($a->image->alt, $image['alt'], 'Alt text correct.');
     $this->assertEquals($a->image->title, $image['title'], 'Title text correct.');
     $this->assertEquals($a->image->entity->url(), $image['url'], 'Retrieve correct image url.');
-    $this->assertNotEmpty(trim($image['responsive']), 'Responsive image returned.');
+
+    /**
+     * Responsive image output should contain the name of the file.
+     *
+     * @see \Drupal\image\Plugin\Field\FieldType\ImageItem::generateSampleValue()
+     */
+    $this->assertContains('generateImage', $image['responsive'], 'Proper responsive image returned.');
   }
 
 }