Issue #2744663 by jholding, rivimey, John Cook, hctom, mahalingam_cs: Batch missing title on screen

core/modules/system/src/Controller/BatchController.php

@@ -61,11 +61,22 @@ class BatchController implements ContainerInjectionInterface {
       return $output;
     }
     elseif (isset($output)) {
+      $title = isset($output['#title']) ? $output['#title'] : NULL;
       $page = [
         '#type' => 'page',
+        '#title' => $title,
         '#show_messages' => FALSE,
         'content' => $output,
       ];
+
+      // Also inject title as a page header (if available).
+      if ($title) {
+        $page['header'] = [
+          '#type' => 'page_title',
+          '#title' => $title,
+        ];
+      }
+
       return $page;
     }
   }

core/modules/system/tests/src/Functional/Batch/PageTest.php

@@ -50,7 +50,15 @@ class PageTest extends BrowserTestBase {
     // Visit an administrative page that runs a test batch, and check that the
     // title shown during batch execution (which the batch callback function
     // saved as a variable) matches the theme used on the administrative page.
+    // Run initial step only first.
+    $this->maximumMetaRefreshCount = 0;
     $this->drupalGet('batch-test/test-title');
+    $this->assertText('Batch Test', 'The test is in the html output.');
+
+    // Leave the batch process running.
+    $this->maximumMetaRefreshCount = NULL;
+    $this->drupalGet('batch-test/test-title');
+
     // The stack should contain the title shown on the progress page.
     $this->assertEqual(batch_test_stack(), ['Batch Test'], 'The batch title is shown on the batch page.');
     $this->assertText('Redirection successful.', 'Redirection after batch execution is correct.');