FieldTestBase.php

<?php

namespace Drupal\Tests\field\Functional;

use Drupal\Component\Render\FormattableMarkup;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\Tests\BrowserTestBase;

/**
 * Parent class for Field API tests.
 */
abstract class FieldTestBase extends BrowserTestBase {
    
    /**
     * Generate random values for a field_test field.
     *
     * @param $cardinality
     *   Number of values to generate.
     *
     * @return
     *   An array of random values, in the format expected for field values.
     */
    public function _generateTestFieldValues($cardinality) {
        $values = [];
        for ($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 \Drupal\Core\Entity\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_DEFAULT.
     * @param $column
     *   (Optional) The name of the column to check. Defaults to 'value'.
     */
    public function assertFieldValues(EntityInterface $entity, $field_name, $expected_values, $langcode = LanguageInterface::LANGCODE_DEFAULT, $column = 'value') {
        // Re-load the entity to make sure we have the latest changes.
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity->getEntityTypeId());
        $storage->resetCache([
            $entity->id(),
        ]);
        $e = $storage->load($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, new FormattableMarkup('Value @value was saved correctly.', [
                '@value' => $value,
            ]));
        }
    }

}