--- /dev/null
+<?php
+
+namespace Drupal\Tests\responsive_image\Functional\Update;
+
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
+use Drupal\Core\Serialization\Yaml;
+use Drupal\FunctionalTests\Update\UpdatePathTestBase;
+
+/**
+ * Tests responsive image module updates.
+ *
+ * @group responsive_image
+ */
+class ResponsiveImageUpdateTest extends UpdatePathTestBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setDatabaseDumpFiles() {
+ $this->databaseDumpFiles = [
+ __DIR__ . '/../../../../../system/tests/fixtures/update/drupal-8-rc1.bare.standard.php.gz',
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ /** @var \Drupal\Core\State\StateInterface $state */
+ $state = $this->container->get('state');
+
+ // Enable responsive_image module without using the module installer to
+ // avoid installation of configuration shipped in module.
+ $system_module_files = $state->get('system.module.files', []);
+ $system_module_files += ['responsive_image' => 'core/modules/responsive_image/responsive_image.info.yml'];
+ $state->set('system.module.files', $system_module_files);
+ $this->config('core.extension')->set('module.responsive_image', 0)->save();
+ $this->container->get('module_handler')->addModule('responsive_image', 'core/modules/responsive_image');
+ }
+
+ /**
+ * Tests post-update responsive_image_post_update_dependency().
+ *
+ * @see responsive_image_post_update_dependency()
+ */
+ public function testPostUpdateDependency() {
+ // Installing the 'wide' responsive image style.
+ $wide_image_style = Yaml::decode(file_get_contents(__DIR__ . '/../../../../../../profiles/standard/config/optional/responsive_image.styles.wide.yml'));
+ $this->config('responsive_image.styles.wide')->setData($wide_image_style)->save(TRUE);
+
+ // Change 'field_image' formatter to a responsive image formatter.
+ $options = [
+ 'type' => 'responsive_image',
+ 'label' => 'hidden',
+ 'settings' => ['responsive_image_style' => 'wide', 'image_link' => ''],
+ 'third_party_settings' => [],
+ ];
+ $display = $this->config('core.entity_view_display.node.article.default');
+ $display->set('content.field_image', $options)->save(TRUE);
+
+ // Check that there's no dependency to 'responsive_image.styles.wide'.
+ $dependencies = $display->get('dependencies.config') ?: [];
+ $this->assertFalse(in_array('responsive_image.styles.wide', $dependencies));
+
+ // Run updates.
+ $this->runUpdates();
+
+ /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $view_display */
+ $view_display = EntityViewDisplay::load('node.article.default');
+ $dependencies = $view_display->getDependencies() + ['config' => []];
+ // Check that post-update added a 'responsive_image.styles.wide' dependency.
+ $this->assertTrue(in_array('responsive_image.styles.wide', $dependencies['config']));
+ }
+
+}