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diff --git a/web/modules/contrib/linkchecker/src/Tests/LinkCheckerInterfaceTest.php b/web/modules/contrib/linkchecker/src/Tests/LinkCheckerInterfaceTest.php
new file mode 100644
index 000000000..d303b9404
--- /dev/null
+++ b/web/modules/contrib/linkchecker/src/Tests/LinkCheckerInterfaceTest.php
@@ -0,0 +1,214 @@
+<?php
+
+namespace Drupal\linkchecker\Tests;
+
+use Drupal\Core\Session\AccountInterface;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Test case for interface tests.
+ *
+ * @group Link checker
+ */
+class LinkCheckerInterfaceTest extends WebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'block',
+    'linkchecker',
+    'path',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $full_html_format = filter_format_load('full_html');
+    $permissions = [
+      // Block permissions.
+      'administer blocks',
+      // Comment permissions.
+      'administer comments',
+      'access comments',
+      'post comments',
+      'skip comment approval',
+      'edit own comments',
+      // Node permissions.
+      'create page content',
+      'edit own page content',
+      // Path aliase permissions.
+      'administer url aliases',
+      'create url aliases',
+      // Content filter permissions.
+      filter_permission_name($full_html_format),
+    ];
+
+    // User to set up google_analytics.
+    $this->admin_user = $this->drupalCreateUser($permissions);
+    $this->drupalLogin($this->admin_user);
+  }
+
+  /**
+   * Test the interface functionality.
+   */
+  public function testLinkCheckerCreateNodeWithBrokenLinks() {
+    // Enable all node type page for link extraction.
+    variable_set('linkchecker_scan_node_page', TRUE);
+
+    // Core enables the URL filter for "Full HTML" by default.
+    // -> Blacklist / Disable URL filter for testing.
+    variable_set('linkchecker_filter_blacklist', array('filter_url' => 'filter_url'));
+
+    // Extract from all link checker supported HTML tags.
+    variable_set('linkchecker_extract_from_a', 1);
+    variable_set('linkchecker_extract_from_audio', 1);
+    variable_set('linkchecker_extract_from_embed', 1);
+    variable_set('linkchecker_extract_from_iframe', 1);
+    variable_set('linkchecker_extract_from_img', 1);
+    variable_set('linkchecker_extract_from_object', 1);
+    variable_set('linkchecker_extract_from_video', 1);
+
+    $url1 = 'http://example.com/node/broken/link';
+    $body = 'Lorem ipsum dolor sit amet <a href="' . $url1 . '">broken link</a> sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat';
+
+    // Save folder names in variables for reuse.
+    $folder1 = $this->randomName(10);
+    $folder2 = $this->randomName(5);
+
+    // Fill node array.
+    $langcode = LANGUAGE_NONE;
+    $edit = array();
+    $edit['title'] = $this->randomName(32);
+    $edit["body[$langcode][0][value]"] = $body;
+    $edit['path[alias]'] = $folder1 . '/' . $folder2;
+    $edit["body[$langcode][0][format]"] = 'full_html';
+
+    // Extract only full qualified URLs.
+    variable_set('linkchecker_check_links_types', 1);
+
+    // Verify path input field appears on add "Basic page" form.
+    $this->drupalGet('node/add/page');
+    // Verify path input is present.
+    $this->assertFieldByName('path[alias]', '', 'Path input field present on add Basic page form.');
+
+    // Save node.
+    $this->drupalPost('node/add/page', $edit, t('Save'));
+    $this->assertText(t('@type @title has been created.', array('@type' => 'Basic page', '@title' => $edit['title'])), 'Node was created.');
+
+    $node = $this->drupalGetNodeByTitle($edit['title']);
+    $this->assertTrue($node, 'Node found in database.');
+
+    // Verify if the content link is extracted properly.
+    $link = $this->getLinkCheckerLink($url1);
+    if ($link) {
+      $this->assertIdentical($link->url, $url1, format_string('URL %url found.', array('%url' => $url1)));
+    }
+    else {
+      $this->fail(format_string('URL %url not found.', array('%url' => $url1)));
+    }
+
+    // Set link as failed once.
+    $fail_count = 1;
+    $status = '301';
+    $this->setLinkAsBroken($url1, $status, $fail_count);
+    $this->drupalGet('node/' . $node->nid . '/edit');
+    $this->assertRaw(format_plural($fail_count, 'Link check of <a href="@url">@url</a> failed once (status code: @code).', 'Link check of <a href="@url">@url</a> failed @count times (status code: @code).', array('@url' => $url1, '@code' => $status)), 'Link check failed once found.');
+
+    // Set link as failed multiple times.
+    $fail_count = 4;
+    $status = '404';
+    $this->setLinkAsBroken($url1, $status, $fail_count);
+    $this->drupalGet('node/' . $node->nid . '/edit');
+    $this->assertRaw(format_plural($fail_count, 'Link check of <a href="@url">@url</a> failed once (status code: @code).', 'Link check of <a href="@url">@url</a> failed @count times (status code: @code).', array('@url' => $url1, '@code' => $status)), 'Link check failed multiple times found.');
+  }
+
+  public function testLinkCheckerCreateBlockWithBrokenLinks() {
+    // Enable all blocks for link extraction.
+    variable_set('linkchecker_scan_blocks', 1);
+
+    // Confirm that the add block link appears on block overview pages.
+    $this->drupalGet('admin/structure/block');
+    $this->assertRaw(l(t('Add block'), 'admin/structure/block/add'), 'Add block link is present on block overview page for default theme.');
+
+    $url1 = 'http://example.com/block/broken/link';
+    $body = 'Lorem ipsum dolor sit amet <a href="' . $url1 . '">broken link</a> sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat';
+
+    // Add a new custom block by filling out the input form on the admin/structure/block/add page.
+    $custom_block = array();
+    $custom_block['info'] = $this->randomName(8);
+    $custom_block['title'] = $this->randomName(8);
+    $custom_block['body[value]'] = $body;
+    $custom_block['body[format]'] = 'full_html';
+    $this->drupalPost('admin/structure/block/add', $custom_block, t('Save block'));
+
+    // Confirm that the custom block has been created, and then query the created bid.
+    $this->assertText(t('The block has been created.'), 'Custom block successfully created.');
+    $bid = db_query("SELECT bid FROM {block_custom} WHERE info = :info", array(':info' => $custom_block['info']))->fetchField();
+
+    // Check to see if the custom block was created by checking that it's in the database.
+    $this->assertNotNull($bid, 'Custom block found in database');
+
+    // Verify if the content link is extracted properly.
+    $link = $this->getLinkCheckerLink($url1);
+    if ($link) {
+      $this->assertIdentical($link->url, $url1, format_string('URL %url found.', array('%url' => $url1)));
+    }
+    else {
+      $this->fail(format_string('URL %url not found.', array('%url' => $url1)));
+    }
+
+    // Set link as failed once.
+    $fail_count = 1;
+    $status = '301';
+    $this->setLinkAsBroken($url1, $status, $fail_count);
+    $this->drupalGet('admin/structure/block/manage/block/' . $bid . '/configure');
+    $this->assertRaw(format_plural($fail_count, 'Link check of <a href="@url">@url</a> failed once (status code: @code).', 'Link check of <a href="@url">@url</a> failed @count times (status code: @code).', array('@url' => $url1, '@code' => $status)), 'Link check failed once found.');
+
+    // Set link as failed multiple times.
+    $fail_count = 4;
+    $status = '404';
+    $this->setLinkAsBroken($url1, $status, $fail_count);
+    $this->drupalGet('admin/structure/block/manage/block/' . $bid . '/configure');
+    $this->assertRaw(format_plural($fail_count, 'Link check of <a href="@url">@url</a> failed once (status code: @code).', 'Link check of <a href="@url">@url</a> failed @count times (status code: @code).', array('@url' => $url1, '@code' => $status)), 'Link check failed multiple times found.');
+  }
+
+  /**
+   * Set an URL as broken.
+   *
+   * @param string $url
+   *   URL of the link to find.
+   * @param string $status
+   *   A fake HTTP code for testing.
+   */
+  function setLinkAsBroken($url = NULL, $status = '404', $fail_count = 0) {
+    db_update('linkchecker_link')
+    ->condition('urlhash', drupal_hash_base64($url))
+    ->fields(array(
+      'code' => $status,
+      'error' => 'Not available (test running)',
+      'fail_count' => $fail_count,
+      'last_checked' => time(),
+      'status' => 1,
+    ))
+    ->execute();
+  }
+
+  /**
+   * Get linkchecker link by url.
+   *
+   * @param string $url
+   *   URL of the link to find.
+   *
+   * @return object
+   *   The link object.
+   */
+  function getLinkCheckerLink($url) {
+    return db_query('SELECT * FROM {linkchecker_link} WHERE urlhash = :urlhash', array(':urlhash' => drupal_hash_base64($url)))->fetchObject();
+  }
+}