Issue #2817115 by tstoeckler, dawehner, cilefen:...

Issue #2817115 by tstoeckler, dawehner, cilefen: JavascriptTestBase::tearDown() fails if $this->mink is not set

core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php

@@ -47,16 +47,18 @@ protected function initMink() {
    * {@inheritdoc}
    */
   protected function tearDown() {
+    if ($this->mink) {
       // Wait for all requests to finish. It is possible that an AJAX request is
       // still on-going.
       $result = $this->getSession()->wait(5000, '(typeof(jQuery)=="undefined" || (0 === jQuery.active && 0 === jQuery(\':animated\').length))');
       if (!$result) {
         // If the wait is unsuccessful, there may still be an AJAX request in
         // progress. If we tear down now, then this AJAX request may fail with
-      // missing database tables, because tear down will have removed them. Rather
-      // than allow it to fail, throw an explicit exception now explaining what
-      // the problem is.
-      throw new \RuntimeException('Unfinished AJAX requests whilst tearing down a test');
+        // missing database tables, because tear down will have removed them.
+        // Rather than allow it to fail, throw an explicit exception now
+        // explaining what the problem is.
+        throw new \RuntimeException('Unfinished AJAX requests while tearing down a test');
+      }
     }
     parent::tearDown();
   }

core/tests/Drupal/Tests/BrowserTestBase.php

@@ -263,7 +263,9 @@ abstract class BrowserTestBase extends \PHPUnit_Framework_TestCase {
   /**
    * Mink session manager.
    *
-   * @var \Behat\Mink\Mink
+   * This will not be initialized if there was an error during the test setup.
+   *
+   * @var \Behat\Mink\Mink|null
    */
   protected $mink;