diff --git a/core/modules/field/src/Tests/FieldUnitTestBase.php b/core/modules/field/src/Tests/FieldUnitTestBase.php
new file mode 100644
index 0000000000000000000000000000000000000000..a223d4573c6b10c75959a888338a54b3e8b279e5
--- /dev/null
+++ b/core/modules/field/src/Tests/FieldUnitTestBase.php
@@ -0,0 +1,211 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\field\Tests\FieldUnitTestBase.
+ */
+
+namespace Drupal\field\Tests;
+
+use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\simpletest\KernelTestBase;
+
+/**
+ * Parent class for Field API unit tests.
+ *
+ * @deprecated in Drupal 8.1.x, will be removed before Drupal 8.2.x. Use
+ * \Drupal\Tests\field\Kernel\FieldKernelTestBase instead.
+ */
+abstract class FieldUnitTestBase extends KernelTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['user', 'system', 'field', 'text', 'entity_test', 'field_test'];
+
+ /**
+ * Bag of created field storages and fields.
+ *
+ * Allows easy access to test field storage/field names/IDs/objects via:
+ * - $this->fieldTestData->field_name[suffix]
+ * - $this->fieldTestData->field_storage[suffix]
+ * - $this->fieldTestData->field_storage_uuid[suffix]
+ * - $this->fieldTestData->field[suffix]
+ * - $this->fieldTestData->field_definition[suffix]
+ *
+ * @see \Drupal\field\Tests\FieldUnitTestBase::createFieldWithStorage()
+ *
+ * @var \ArrayObject
+ */
+ protected $fieldTestData;
+
+ /**
+ * Set the default field storage backend for fields created during tests.
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ $this->fieldTestData = new \ArrayObject(array(), \ArrayObject::ARRAY_AS_PROPS);
+
+ $this->installEntitySchema('entity_test');
+ $this->installEntitySchema('user');
+ $this->installSchema('system', ['sequences', 'key_value']);
+
+ // Set default storage backend and configure the theme system.
+ $this->installConfig(array('field', 'system'));
+
+ // Create user 1.
+ $storage = \Drupal::entityManager()->getStorage('user');
+ $storage
+ ->create(array(
+ 'uid' => 1,
+ 'name' => 'entity-test',
+ 'mail' => 'entity@localhost',
+ 'status' => TRUE,
+ ))
+ ->save();
+ }
+
+ /**
+ * Create a field and an associated field storage.
+ *
+ * @param string $suffix
+ * (optional) A string that should only contain characters that are valid in
+ * PHP variable names as well.
+ * @param string $entity_type
+ * (optional) The entity type on which the field should be created.
+ * Defaults to "entity_test".
+ * @param string $bundle
+ * (optional) The entity type on which the field should be created.
+ * Defaults to the default bundle of the entity type.
+ */
+ protected function createFieldWithStorage($suffix = '', $entity_type = 'entity_test', $bundle = NULL) {
+ if (empty($bundle)) {
+ $bundle = $entity_type;
+ }
+ $field_name = 'field_name' . $suffix;
+ $field_storage = 'field_storage' . $suffix;
+ $field_storage_uuid = 'field_storage_uuid' . $suffix;
+ $field = 'field' . $suffix;
+ $field_definition = 'field_definition' . $suffix;
+
+ $this->fieldTestData->$field_name = Unicode::strtolower($this->randomMachineName() . '_field_name' . $suffix);
+ $this->fieldTestData->$field_storage = FieldStorageConfig::create(array(
+ 'field_name' => $this->fieldTestData->$field_name,
+ 'entity_type' => $entity_type,
+ 'type' => 'test_field',
+ 'cardinality' => 4,
+ ));
+ $this->fieldTestData->$field_storage->save();
+ $this->fieldTestData->$field_storage_uuid = $this->fieldTestData->$field_storage->uuid();
+ $this->fieldTestData->$field_definition = array(
+ 'field_storage' => $this->fieldTestData->$field_storage,
+ 'bundle' => $bundle,
+ 'label' => $this->randomMachineName() . '_label',
+ 'description' => $this->randomMachineName() . '_description',
+ 'settings' => array(
+ 'test_field_setting' => $this->randomMachineName(),
+ ),
+ );
+ $this->fieldTestData->$field = FieldConfig::create($this->fieldTestData->$field_definition);
+ $this->fieldTestData->$field->save();
+
+ entity_get_form_display($entity_type, $bundle, 'default')
+ ->setComponent($this->fieldTestData->$field_name, array(
+ 'type' => 'test_field_widget',
+ 'settings' => array(
+ 'test_widget_setting' => $this->randomMachineName(),
+ )
+ ))
+ ->save();
+ }
+
+ /**
+ * Saves and reloads an entity.
+ *
+ * @param \Drupal\Core\Entity\EntityInterface $entity
+ * The entity to save.
+ *
+ * @return \Drupal\Core\Entity\EntityInterface
+ * The entity, freshly reloaded from storage.
+ */
+ protected function entitySaveReload(EntityInterface $entity) {
+ $entity->save();
+ $controller = $this->container->get('entity.manager')->getStorage($entity->getEntityTypeId());
+ $controller->resetCache();
+ return $controller->load($entity->id());
+ }
+
+ /**
+ * Validate and save entity. Fail if violations are found.
+ *
+ * @param \Drupal\Core\Entity\EntityInterface $entity
+ * The entity to save.
+ *
+ * @return void
+ */
+ protected function entityValidateAndSave(EntityInterface $entity) {
+ $violations = $entity->validate();
+ if ($violations->count()) {
+ $this->fail($violations);
+ }
+ else {
+ $entity->save();
+ }
+ }
+
+ /**
+ * Generate random values for a field_test field.
+ *
+ * @param $cardinality
+ * Number of values to generate.
+ * @return
+ * An array of random values, in the format expected for field values.
+ */
+ protected function _generateTestFieldValues($cardinality) {
+ $values = array();
+ for ($i = 0; $i < $cardinality; $i++) {
+ // field_test fields treat 0 as 'empty value'.
+ $values[$i]['value'] = mt_rand(1, 127);
+ }
+ return $values;
+ }
+
+ /**
+ * Assert that a field has the expected values in an entity.
+ *
+ * This function only checks a single column in the field values.
+ *
+ * @param EntityInterface $entity
+ * The entity to test.
+ * @param $field_name
+ * The name of the field to test
+ * @param $expected_values
+ * The array of expected values.
+ * @param $langcode
+ * (Optional) The language code for the values. Defaults to
+ * \Drupal\Core\Language\LanguageInterface::LANGCODE_NOT_SPECIFIED.
+ * @param $column
+ * (Optional) The name of the column to check. Defaults to 'value'.
+ */
+ protected function assertFieldValues(EntityInterface $entity, $field_name, $expected_values, $langcode = LanguageInterface::LANGCODE_NOT_SPECIFIED, $column = 'value') {
+ // Re-load the entity to make sure we have the latest changes.
+ \Drupal::entityManager()->getStorage($entity->getEntityTypeId())->resetCache(array($entity->id()));
+ $e = entity_load($entity->getEntityTypeId(), $entity->id());
+ $field = $values = $e->getTranslation($langcode)->$field_name;
+ // Filter out empty values so that they don't mess with the assertions.
+ $field->filterEmptyItems();
+ $values = $field->getValue();
+ $this->assertEqual(count($values), count($expected_values), 'Expected number of values were saved.');
+ foreach ($expected_values as $key => $value) {
+ $this->assertEqual($values[$key][$column], $value, format_string('Value @value was saved correctly.', array('@value' => $value)));
+ }
+ }
+
+}