--- /dev/null
+<?php
+
+namespace Drupal\Tests\layout_builder\Kernel;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\layout_builder\Section;
+
+/**
+ * Ensures that Layout Builder and core EntityViewDisplays are compatible.
+ *
+ * @group layout_builder
+ */
+class LayoutBuilderInstallTest extends LayoutBuilderCompatibilityTestBase {
+
+ /**
+ * Tests the compatibility of Layout Builder with existing entity displays.
+ */
+ public function testCompatibility() {
+ // Ensure that the fields are shown.
+ $expected_fields = [
+ 'field field--name-name field--type-string field--label-hidden field__item',
+ 'field field--name-test-field-display-configurable field--type-boolean field--label-above',
+ 'clearfix text-formatted field field--name-test-display-configurable field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-display-non-configurable field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-display-multiple field--type-text field--label-above',
+ ];
+ $this->assertFieldAttributes($this->entity, $expected_fields);
+
+ $this->installLayoutBuilder();
+
+ // Without using Layout Builder for an override, the result has not changed.
+ $this->assertFieldAttributes($this->entity, $expected_fields);
+
+ // Add a layout override.
+ $this->entity->get('layout_builder__layout')->appendSection(new Section('layout_onecol'));
+ $this->entity->save();
+
+ // The rendered entity has now changed. The non-configurable field is shown
+ // outside the layout, the configurable field is not shown at all, and the
+ // layout itself is rendered (but empty).
+ $new_expected_fields = [
+ 'field field--name-name field--type-string field--label-hidden field__item',
+ 'clearfix text-formatted field field--name-test-display-non-configurable field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-display-multiple field--type-text field--label-above',
+ ];
+ $this->assertFieldAttributes($this->entity, $new_expected_fields);
+ $this->assertNotEmpty($this->cssSelect('.layout--onecol'));
+
+ // Removing the layout restores the original rendering of the entity.
+ $this->entity->get('layout_builder__layout')->removeSection(0);
+ $this->entity->save();
+ $this->assertFieldAttributes($this->entity, $expected_fields);
+
+ // Test that adding a new field after Layout Builder has been installed will
+ // add the new field to the default region of the first section.
+ $field_storage = FieldStorageConfig::create([
+ 'entity_type' => 'entity_test_base_field_display',
+ 'field_name' => 'test_field_display_post_install',
+ 'type' => 'text',
+ ]);
+ $field_storage->save();
+ FieldConfig::create([
+ 'field_storage' => $field_storage,
+ 'bundle' => 'entity_test_base_field_display',
+ 'label' => 'FieldConfig with configurable display',
+ ])->save();
+
+ $this->entity = $this->reloadEntity($this->entity);
+ $this->entity->test_field_display_post_install = 'Test string';
+ $this->entity->save();
+
+ $this->display = $this->reloadEntity($this->display);
+ $this->display
+ ->setComponent('test_field_display_post_install', ['weight' => 50])
+ ->save();
+ $new_expected_fields = [
+ 'field field--name-name field--type-string field--label-hidden field__item',
+ 'field field--name-test-field-display-configurable field--type-boolean field--label-above',
+ 'clearfix text-formatted field field--name-test-display-configurable field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-field-display-post-install field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-display-non-configurable field--type-text field--label-above',
+ 'clearfix text-formatted field field--name-test-display-multiple field--type-text field--label-above',
+ ];
+ $this->assertFieldAttributes($this->entity, $new_expected_fields);
+ $this->assertNotEmpty($this->cssSelect('.layout--onecol'));
+ $this->assertText('Test string');
+ }
+
+}