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diff --git a/web/modules/contrib/entity_reference_revisions/src/Tests/EntityReferenceRevisionsAutocompleteTest.php b/web/modules/contrib/entity_reference_revisions/src/Tests/EntityReferenceRevisionsAutocompleteTest.php
new file mode 100644
index 000000000..4998a41ce
--- /dev/null
+++ b/web/modules/contrib/entity_reference_revisions/src/Tests/EntityReferenceRevisionsAutocompleteTest.php
@@ -0,0 +1,146 @@
+<?php
+
+namespace Drupal\entity_reference_revisions\Tests;
+
+use Drupal\block_content\Entity\BlockContent;
+use Drupal\Component\Utility\Html;
+use Drupal\field_ui\Tests\FieldUiTestTrait;
+use Drupal\node\Entity\Node;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests the entity_reference_revisions autocomplete.
+ *
+ * @group entity_reference_revisions
+ */
+class EntityReferenceRevisionsAutocompleteTest extends WebTestBase {
+
+  use FieldUiTestTrait;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array(
+    'block_content',
+    'node',
+    'field',
+    'entity_reference_revisions',
+    'field_ui',
+  );
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    // Create article content type.
+    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
+    // Place the breadcrumb, tested in fieldUIAddNewField().
+    $this->drupalPlaceBlock('system_breadcrumb_block');
+  }
+
+  /**
+   * Test for autocomplete processing.
+   *
+   * Tests that processing does not crash when the entity types of the
+   * referenced entity and of the entity the field is attached to are different.
+   */
+  public function testEntityReferenceRevisionsAutocompleteProcessing() {
+    $admin_user = $this->drupalCreateUser(array(
+      'administer site configuration',
+      'administer nodes',
+      'administer blocks',
+      'create article content',
+      'administer content types',
+      'administer node fields',
+      'administer node display',
+      'administer node form display',
+      'edit any article content',
+    ));
+    $this->drupalLogin($admin_user);
+
+    // Create a custom block content bundle.
+    $this->createBlockContentType(array('type' => 'customblockcontent', 'name' => 'Custom Block Content'));
+
+    // Create entity reference revisions field attached to article.
+    static::fieldUIAddNewField(
+      'admin/structure/types/manage/article',
+      'entity_reference_revisions',
+      'Entity reference revisions',
+      'entity_reference_revisions',
+      array('settings[target_type]' => 'block_content', 'cardinality' => '-1'),
+      array('settings[handler_settings][target_bundles][customblockcontent]' => TRUE)
+    );
+
+    // Create custom block.
+    $block_label = $this->randomMachineName();
+    $block_content = $this->randomString();
+    $edit = array(
+      'info[0][value]' => $block_label,
+      'body[0][value]' => $block_content,
+    );
+    $this->drupalPostForm('block/add', $edit, t('Save'));
+    $block = $this->drupalGetBlockByInfo($block_label);
+
+    // Create an article.
+    $title = $this->randomMachineName();
+    $edit = array(
+      'title[0][value]' => $title,
+      'body[0][value]' => 'Revision 1',
+      'field_entity_reference_revisions[0][target_id]' => $block_label . ' (' . $block->id() . ')',
+    );
+    $this->drupalPostForm('node/add/article', $edit, t('Save and publish'));
+    $this->assertText($title);
+    $this->assertText(Html::escape($block_content));
+
+    // Check if the block content is not deleted since there is no composite
+    // relationship.
+    $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
+    $node = Node::load($node->id());
+    $node->delete();
+    $this->assertNotNull(BlockContent::load($block->id()));
+  }
+
+  /**
+   * Get a custom block from the database based on its title.
+   *
+   * @param $info
+   *   A block title, usually generated by $this->randomMachineName().
+   * @param $reset
+   *   (optional) Whether to reset the entity cache.
+   *
+   * @return \Drupal\block\BlockInterface
+   *   A block entity matching $info.
+   */
+  function drupalGetBlockByInfo($info, $reset = FALSE) {
+    if ($reset) {
+      \Drupal::entityTypeManager()->getStorage('block_content')->resetCache();
+    }
+    $blocks = \Drupal::entityTypeManager()->getStorage('block_content')->loadByProperties(array('info' => $info));
+    // Get the first block returned from the database.
+    $returned_block = reset($blocks);
+    return $returned_block;
+  }
+
+  /**
+   * Create a block_content bundle.
+   *
+   * @param $parameters
+   *   An assoc array with name (human readable) and type (bundle machine name)
+   *   as keys.
+   */
+  function createBlockContentType($parameters) {
+    $label = $parameters['name'];
+    $machine_name = $parameters['type'];
+    $edit = array(
+      'label' => $label,
+      'id' => $machine_name,
+      'revision' => TRUE,
+    );
+    $this->drupalPostForm('admin/structure/block/block-content/types/add', $edit, t('Save'));
+    $this->assertText($label);
+  }
+
+}