class FieldFormatterTest

class FieldFormatterTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'field',
        'text',
        'entity_test',
        'field_test',
        'system',
        'filter',
        'user',
    ];
    
    /**
     * The field's name.
     *
     * @var string
     */
    protected $fieldName;
    
    /**
     * The default display.
     *
     * @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface
     */
    protected $display;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Configure the theme system.
        $this->installConfig([
            'system',
            'field',
        ]);
        $this->installEntitySchema('entity_test_rev');
        $entity_type = 'entity_test_rev';
        $bundle = $entity_type;
        $this->fieldName = mb_strtolower($this->randomMachineName());
        $field_storage = FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => $entity_type,
            'type' => 'string',
        ]);
        $field_storage->save();
        $instance = FieldConfig::create([
            'field_storage' => $field_storage,
            'bundle' => $bundle,
            'label' => $this->randomMachineName(),
        ]);
        $instance->save();
        $this->display = EntityViewDisplay::create([
            'targetEntityType' => $entity_type,
            'bundle' => $bundle,
            'mode' => 'default',
            'status' => TRUE,
        ])->setComponent($this->fieldName, [
            'type' => 'string',
            'settings' => [],
        ]);
        $this->display
            ->save();
    }
    
    /**
     * Tests availability of third party settings in field render arrays.
     */
    public function testThirdPartySettings() {
        $third_party_settings = [
            'field_test' => [
                'foo' => 'bar',
            ],
        ];
        $component = $this->display
            ->getComponent($this->fieldName);
        $component['third_party_settings'] = $third_party_settings;
        $this->display
            ->setComponent($this->fieldName, $component)
            ->save();
        $entity = EntityTestRev::create([]);
        $entity->{$this->fieldName}->value = $this->randomString();
        $build = $entity->{$this->fieldName}
            ->view('default');
        $this->assertEquals($third_party_settings, $build['#third_party_settings']);
    }

}