--- /dev/null
+<?php
+
+namespace Drupal\Tests\node\Functional;
+use Drupal\Component\Utility\Unicode;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+
+/**
+ * Tests the interaction of the node access system with fields.
+ *
+ * @group node
+ */
+class NodeAccessFieldTest extends NodeTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['node_access_test', 'field_ui'];
+
+ /**
+ * A user with permission to bypass access content.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $adminUser;
+
+ /**
+ * A user with permission to manage content types and fields.
+ *
+ * @var \Drupal\user\UserInterface
+ */
+ protected $contentAdminUser;
+
+ /**
+ * The name of the created field.
+ *
+ * @var string
+ */
+ protected $fieldName;
+
+ protected function setUp() {
+ parent::setUp();
+
+ node_access_rebuild();
+
+ // Create some users.
+ $this->adminUser = $this->drupalCreateUser(['access content', 'bypass node access']);
+ $this->contentAdminUser = $this->drupalCreateUser(['access content', 'administer content types', 'administer node fields']);
+
+ // Add a custom field to the page content type.
+ $this->fieldName = Unicode::strtolower($this->randomMachineName() . '_field_name');
+ FieldStorageConfig::create([
+ 'field_name' => $this->fieldName,
+ 'entity_type' => 'node',
+ 'type' => 'text'
+ ])->save();
+ FieldConfig::create([
+ 'field_name' => $this->fieldName,
+ 'entity_type' => 'node',
+ 'bundle' => 'page',
+ ])->save();
+ entity_get_display('node', 'page', 'default')
+ ->setComponent($this->fieldName)
+ ->save();
+ entity_get_form_display('node', 'page', 'default')
+ ->setComponent($this->fieldName)
+ ->save();
+ }
+
+ /**
+ * Tests administering fields when node access is restricted.
+ */
+ public function testNodeAccessAdministerField() {
+ // Create a page node.
+ $fieldData = [];
+ $value = $fieldData[0]['value'] = $this->randomMachineName();
+ $node = $this->drupalCreateNode([$this->fieldName => $fieldData]);
+
+ // Log in as the administrator and confirm that the field value is present.
+ $this->drupalLogin($this->adminUser);
+ $this->drupalGet('node/' . $node->id());
+ $this->assertText($value, 'The saved field value is visible to an administrator.');
+
+ // Log in as the content admin and try to view the node.
+ $this->drupalLogin($this->contentAdminUser);
+ $this->drupalGet('node/' . $node->id());
+ $this->assertText('Access denied', 'Access is denied for the content admin.');
+
+ // Modify the field default as the content admin.
+ $edit = [];
+ $default = 'Sometimes words have two meanings';
+ $edit["default_value_input[{$this->fieldName}][0][value]"] = $default;
+ $this->drupalPostForm(
+ "admin/structure/types/manage/page/fields/node.page.{$this->fieldName}",
+ $edit,
+ t('Save settings')
+ );
+
+ // Log in as the administrator.
+ $this->drupalLogin($this->adminUser);
+
+ // Confirm that the existing node still has the correct field value.
+ $this->drupalGet('node/' . $node->id());
+ $this->assertText($value, 'The original field value is visible to an administrator.');
+
+ // Confirm that the new default value appears when creating a new node.
+ $this->drupalGet('node/add/page');
+ $this->assertRaw($default, 'The updated default value is displayed when creating a new node.');
+ }
+
+}