TestItemTest.php

<?php

namespace Drupal\Tests\field\Kernel;

use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\entity_test\Entity\EntityTest;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;

/**
 * Tests the new entity API for the test field type.
 *
 * @group field
 */
class TestItemTest extends FieldKernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'field_test',
    ];
    
    /**
     * The name of the field to use in this test.
     *
     * @var string
     */
    protected $fieldName = 'field_test';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create a 'test_field' field and storage for validation.
        FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => 'entity_test',
            'type' => 'test_field',
        ])
            ->save();
        FieldConfig::create([
            'entity_type' => 'entity_test',
            'field_name' => $this->fieldName,
            'bundle' => 'entity_test',
        ])
            ->save();
    }
    
    /**
     * Tests using entity fields of the test field type.
     */
    public function testTestItem() {
        // Verify entity creation.
        $entity = EntityTest::create();
        $value = rand(1, 10);
        $entity->field_test = $value;
        $entity->name->value = $this->randomMachineName();
        $entity->save();
        // Verify entity has been created properly.
        $id = $entity->id();
        $entity = EntityTest::load($id);
        $this->assertInstanceOf(FieldItemListInterface::class, $entity->{$this->fieldName});
        $this->assertInstanceOf(FieldItemInterface::class, $entity->{$this->fieldName}[0]);
        $this->assertEquals($value, $entity->{$this->fieldName}->value);
        $this->assertEquals($value, $entity->{$this->fieldName}[0]->value);
        // Verify changing the field value.
        $new_value = rand(1, 10);
        $entity->field_test->value = $new_value;
        $this->assertEquals($new_value, $entity->{$this->fieldName}->value);
        // Read changed entity and assert changed values.
        $entity->save();
        $entity = EntityTest::load($id);
        $this->assertEquals($new_value, $entity->{$this->fieldName}->value);
        // Test the schema for this field type.
        $expected_schema = [
            'columns' => [
                'value' => [
                    'type' => 'int',
                    'size' => 'medium',
                ],
            ],
            'unique keys' => [],
            'indexes' => [
                'value' => [
                    'value',
                ],
            ],
            'foreign keys' => [],
        ];
        $field_schema = BaseFieldDefinition::create('test_field')->getSchema();
        $this->assertEquals($expected_schema, $field_schema);
    }

}