WidgetPluginManagerTest.php

<?php

namespace Drupal\Tests\field\Kernel;

use Drupal\Core\Field\BaseFieldDefinition;

/**
 * Tests the field widget manager.
 *
 * @group field
 */
class WidgetPluginManagerTest extends FieldKernelTestBase {
    
    /**
     * Tests that the widget definitions alter hook works.
     */
    public function testWidgetDefinitionAlter() {
        $widget_definition = \Drupal::service('plugin.manager.field.widget')->getDefinition('test_field_widget_multiple');
        // Test if hook_field_widget_info_alter is being called.
        $this->assertContains('test_field', $widget_definition['field_types'], "The 'test_field_widget_multiple' widget is enabled for the 'test_field' field type in field_test_field_widget_info_alter().");
    }
    
    /**
     * Tests that getInstance falls back on default if current is not applicable.
     *
     * @see \Drupal\field\Tests\FormatterPluginManagerTest::testNotApplicableFallback()
     */
    public function testNotApplicableFallback() {
        
        /** @var \Drupal\Core\Field\WidgetPluginManager $widget_plugin_manager */
        $widget_plugin_manager = \Drupal::service('plugin.manager.field.widget');
        $base_field_definition = BaseFieldDefinition::create('test_field')->setName('field_multiwidgetfield');
        $widget_options = [
            'field_definition' => $base_field_definition,
            'form_mode' => 'default',
            'configuration' => [
                'type' => 'test_field_widget_multiple',
            ],
        ];
        $instance = $widget_plugin_manager->getInstance($widget_options);
        $this->assertEqual($instance->getPluginId(), 'test_field_widget_multiple');
        // Now do the same but with machine name field_onewidgetfield, because that
        // makes isApplicable() return FALSE.
        $base_field_definition->setName('field_onewidgetfield');
        $instance = $widget_plugin_manager->getInstance($widget_options);
        // Instance should be default widget.
        $this->assertNotEqual($instance->getPluginId(), 'test_field_widget_multiple');
        $this->assertEqual($instance->getPluginId(), 'test_field_widget');
    }

}