From 19586c5a2dcdb160438e57441174a6b8a4733bf0 Mon Sep 17 00:00:00 2001
From: Dane Powell <git@danepowell.com>
Date: Thu, 26 Oct 2017 15:03:44 -0700
Subject: [PATCH] Issue #2915036 by Dane Powell: Fixed view modes not updating
 in response to new fields.

---
 .../tests/src/Kernel/DisplayModeUpdateTest.php     | 59 ++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php

diff --git a/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
new file mode 100644
index 0000000000..7773239f0d
--- /dev/null
+++ b/core/modules/field/tests/src/Kernel/DisplayModeUpdateTest.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\Tests\field\Kernel;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\Core\Entity\Entity\EntityViewDisplay;
+use Drupal\Core\Entity\Entity\EntityViewMode;
+
+/**
+ * Tests exposing field definitions for configurable fields.
+ *
+ * @group field
+ */
+class DisplayModeUpdateTest extends FieldKernelTestBase {
+
+  /**
+   * Makes sure that display modes are updated when a field is created.
+   */
+  public function testDisplayModeUpdate() {
+    $config_name = 'core.entity_view_display.entity_test.entity_test.foobar';
+
+    entity_test_create_bundle('entity_test');
+
+    EntityViewMode::create([
+      'id' => 'entity_test.foobar',
+      'targetEntityType' => 'entity_test',
+      'status' => TRUE,
+      'enabled' => TRUE,
+    ])->save();
+
+    $display = EntityViewDisplay::create([
+      'targetEntityType' => 'entity_test',
+      'bundle' => 'entity_test',
+      'mode' => 'foobar',
+      'status' => TRUE,
+    ]);
+    $display->save();
+    $this->assertArrayNotHasKey('field_test', \Drupal::config($config_name)->get('hidden'));
+
+    $field_storage = FieldStorageConfig::create([
+      'field_name' => 'field_test',
+      'entity_type' => 'entity_test',
+      'type' => 'test_field',
+      'cardinality' => 1,
+    ]);
+    $field_storage->save();
+
+    FieldConfig::create([
+      'field_storage' => $field_storage,
+      'bundle' => 'entity_test',
+    ])->save();
+
+    $display = EntityViewDisplay::load('entity_test.entity_test.foobar');
+    $this->assertArrayHasKey('field_test', \Drupal::config($config_name)->get('hidden'));
+
+  }
+
+}
-- 
2.14.1