--- /dev/null
+<?php
+
+namespace Drupal\Tests\field\Kernel\String;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
+use Drupal\Core\Entity\FieldableEntityInterface;
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Tests the raw string formatter
+ *
+ * @group field
+ */
+class RawStringFormatterTest extends KernelTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['field', 'text', 'entity_test', 'system', 'filter', 'user'];
+
+ /**
+ * @var string
+ */
+ protected $entityType;
+
+ /**
+ * @var string
+ */
+ protected $bundle;
+
+ /**
+ * @var string
+ */
+ protected $fieldName;
+
+ /**
+ * @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface
+ */
+ protected $display;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ // Configure the theme system.
+ $this->installConfig(['system', 'field']);
+ \Drupal::service('router.builder')->rebuild();
+ $this->installEntitySchema('entity_test');
+
+ $this->entityType = 'entity_test';
+ $this->bundle = $this->entityType;
+ $this->fieldName = Unicode::strtolower($this->randomMachineName());
+
+ $field_storage = FieldStorageConfig::create([
+ 'field_name' => $this->fieldName,
+ 'entity_type' => $this->entityType,
+ 'type' => 'string_long',
+ ]);
+ $field_storage->save();
+
+ $instance = FieldConfig::create([
+ 'field_storage' => $field_storage,
+ 'bundle' => $this->bundle,
+ 'label' => $this->randomMachineName(),
+ ]);
+ $instance->save();
+
+ $this->display = entity_get_display($this->entityType, $this->bundle, 'default')
+ ->setComponent($this->fieldName, [
+ 'type' => 'string',
+ 'settings' => [],
+ ]);
+ $this->display->save();
+ }
+
+ /**
+ * Renders fields of a given entity with a given display.
+ *
+ * @param \Drupal\Core\Entity\FieldableEntityInterface $entity
+ * The entity object with attached fields to render.
+ * @param \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display
+ * The display to render the fields in.
+ *
+ * @return string
+ * The rendered entity fields.
+ */
+ protected function renderEntityFields(FieldableEntityInterface $entity, EntityViewDisplayInterface $display) {
+ $content = $display->build($entity);
+ $content = $this->render($content);
+ return $content;
+ }
+
+ /**
+ * Tests string formatter output.
+ */
+ public function testStringFormatter() {
+ $value = $this->randomString();
+ $value .= "\n\n<strong>" . $this->randomString() . '</strong>';
+ $value .= "\n\n" . $this->randomString();
+
+ $entity = EntityTest::create([]);
+ $entity->{$this->fieldName}->value = $value;
+
+ // Verify that all HTML is escaped and newlines are retained.
+ $this->renderEntityFields($entity, $this->display);
+ $this->assertNoRaw($value);
+ $this->assertRaw(nl2br(Html::escape($value)));
+
+ // Verify the cache tags.
+ $build = $entity->{$this->fieldName}->view();
+ $this->assertTrue(!isset($build[0]['#cache']), 'The string formatter has no cache tags.');
+ }
+
+}