Issue #3296959: Drupal 10 compatibility

Closes #3296959

tests/src/Functional/DiffRevisionTest.php

@@ -18,7 +18,7 @@ class DiffRevisionTest extends DiffTestBase {
   /**
    * {@inheritdoc}
    */
-  protected $defaultTheme = 'classy';
+  protected $defaultTheme = 'stark';
 
   /**
    * {@inheritdoc}
@@ -81,7 +81,7 @@ class DiffRevisionTest extends DiffTestBase {
     $this->submitForm([], 'Compare selected revisions');
     $this->clickLink('Split fields');
     // Assert breadcrumbs are properly displayed.
-    $this->assertSession()->responseContains('<nav class="breadcrumb"');
+    $this->assertSession()->responseContains('<h2 id="system-breadcrumb" class="visually-hidden">Breadcrumb</h2>');
     $trail = [
       '' => 'Home',
       "node/" . $node->id() => $node->label(),
@@ -109,7 +109,7 @@ class DiffRevisionTest extends DiffTestBase {
     $this->clickLink('Strip tags');
     $rows = $this->xpath('//tbody/tr');
     // Assert breadcrumbs are properly displayed.
-    $this->assertSession()->responseContains('<nav class="breadcrumb"');
+    $this->assertSession()->responseContains('<h2 id="system-breadcrumb" class="visually-hidden">Breadcrumb</h2>');
     $trail = [
       '' => 'Home',
       "node/" . $node->id() => $node->label(),
@@ -129,7 +129,7 @@ class DiffRevisionTest extends DiffTestBase {
     // Compare the revisions in single column mode.
     $this->clickLink('Unified fields');
     // Assert breadcrumbs are properly displayed.
-    $this->assertSession()->responseContains('<nav class="breadcrumb"');
+    $this->assertSession()->responseContains('<h2 id="system-breadcrumb" class="visually-hidden">Breadcrumb</h2>');
     $trail = [
       '' => 'Home',
       "node/" . $node->id() => $node->label(),