View source  
  <?php
namespace Drupal\field\Tests\Boolean;
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\simpletest\KernelTestBase;
class BooleanFormatterTest extends KernelTestBase {
  
  public static $modules = [
    'field',
    'text',
    'entity_test',
    'user',
  ];
  
  protected $entityType;
  
  protected $bundle;
  
  protected $fieldName;
  
  protected $display;
  
  protected function setUp() {
    parent::setUp();
    $this
      ->installConfig([
      'field',
    ]);
    $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' => 'boolean',
    ]);
    $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' => 'boolean',
      'settings' => [],
    ]);
    $this->display
      ->save();
  }
  
  protected function renderEntityFields(FieldableEntityInterface $entity, EntityViewDisplayInterface $display) {
    $content = $display
      ->build($entity);
    $content = $this
      ->render($content);
    return $content;
  }
  
  public function testBooleanFormatter() {
    $data = [];
    $data[] = [
      0,
      [],
      'Off',
    ];
    $data[] = [
      1,
      [],
      'On',
    ];
    $format = [
      'format' => 'enabled-disabled',
    ];
    $data[] = [
      0,
      $format,
      'Disabled',
    ];
    $data[] = [
      1,
      $format,
      'Enabled',
    ];
    $format = [
      'format' => 'unicode-yes-no',
    ];
    $data[] = [
      1,
      $format,
      '✔',
    ];
    $data[] = [
      0,
      $format,
      '✖',
    ];
    $format = [
      'format' => 'custom',
      'format_custom_false' => 'FALSE',
      'format_custom_true' => 'TRUE',
    ];
    $data[] = [
      0,
      $format,
      'FALSE',
    ];
    $data[] = [
      1,
      $format,
      'TRUE',
    ];
    foreach ($data as $test_data) {
      list($value, $settings, $expected) = $test_data;
      $component = $this->display
        ->getComponent($this->fieldName);
      $component['settings'] = $settings;
      $this->display
        ->setComponent($this->fieldName, $component);
      $entity = EntityTest::create([]);
      $entity->{$this->fieldName}->value = $value;
      
      $this
        ->renderEntityFields($entity, $this->display);
      $this
        ->assertRaw($expected);
    }
  }
}