Issue #3056008 by alexpott, Lendude: Set default window size in...

Issue #3056008 by alexpott, Lendude: Set default window size in \Drupal\FunctionalJavascriptTests\WebDriverTestBase

core/modules/system/tests/modules/css_disable_transitions_test/css/disable_transitions.theme.css

@@ -29,6 +29,9 @@
 
 /**
  * Prevent youtube and third party content in iFrames from affecting tests.
+ *
+ * @todo Remove once bug in Chromedriver is fixed.
+     https://bugs.chromium.org/p/chromedriver/issues/detail?id=2758
  */
 iframe.media-oembed-content {
   width: 0 !important;

core/tests/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php

@@ -82,6 +82,16 @@ protected function installModulesFromClassProperty(ContainerInterface $container
     parent::installModulesFromClassProperty($container);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function initFrontPage() {
+    parent::initFrontPage();
+    // Set a standard window size so that all javascript tests start with the
+    // same viewport.
+    $this->getSession()->resizeWindow(1024, 768);
+  }
+
   /**
    * {@inheritdoc}
    */