UniqueFieldConstraintTest.php

<?php

namespace Drupal\KernelTests\Core\Validation;

use Drupal\Component\Render\FormattableMarkup;
use Drupal\entity_test\Entity\EntityTestStringId;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the unique field value validation constraint.
 *
 * @coversDefaultClass \Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldValueValidator
 *
 * @group Validation
 */
class UniqueFieldConstraintTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'entity_test',
        'unique_field_constraint_test',
        'user',
    ];
    
    /**
     * Tests cases where the validation passes for entities with string IDs.
     *
     * @covers ::validate
     */
    public function testEntityWithStringId() {
        $this->installEntitySchema('entity_test_string_id');
        EntityTestStringId::create([
            'id' => 'foo',
            'name' => $this->randomString(),
        ])
            ->save();
        // Reload the entity.
        $entity = EntityTestStringId::load('foo');
        // Check that an existing entity validates when the value is preserved.
        $violations = $entity->name
            ->validate();
        $this->assertCount(0, $violations);
        // Create a new entity with a different ID and a different field value.
        EntityTestStringId::create([
            'id' => 'bar',
            'name' => $this->randomString(),
        ]);
        // Check that a new entity with a different field value validates.
        $violations = $entity->name
            ->validate();
        $this->assertCount(0, $violations);
    }
    
    /**
     * Tests cases when validation raises violations for entities with string IDs.
     *
     * @param string|int|null $id
     *   The entity ID.
     *
     * @covers ::validate
     *
     * @dataProvider providerTestEntityWithStringIdWithViolation
     */
    public function testEntityWithStringIdWithViolation($id) {
        $this->installEntitySchema('entity_test_string_id');
        $value = $this->randomString();
        EntityTestStringId::create([
            'id' => 'first_entity',
            'name' => $value,
        ])->save();
        $entity = EntityTestStringId::create([
            'id' => $id,
            'name' => $value,
        ]);
        
        /** @var \Symfony\Component\Validator\ConstraintViolationList $violations */
        $violations = $entity->get('name')
            ->validate();
        $message = new FormattableMarkup('A @entity_type with @field_name %value already exists.', [
            '%value' => $value,
            '@entity_type' => $entity->getEntityType()
                ->getSingularLabel(),
            '@field_name' => 'name',
        ]);
        // Check that the validation has created the appropriate violation.
        $this->assertCount(1, $violations);
        $this->assertEquals($message, $violations[0]->getMessage());
    }
    
    /**
     * Data provider for ::testEntityWithStringIdWithViolation().
     *
     * @return array
     *   An array of test cases.
     *
     * @see self::testEntityWithStringIdWithViolation()
     */
    public function providerTestEntityWithStringIdWithViolation() {
        return [
            'without an id' => [
                NULL,
            ],
            'zero as integer' => [
                0,
            ],
            'zero as string' => [
                "0",
            ],
            'non-zero as integer' => [
                mt_rand(1, 127),
            ],
            'non-zero as string' => [
                (string) mt_rand(1, 127),
            ],
            'alphanumeric' => [
                $this->randomMachineName(),
            ],
        ];
    }

}