class EntityReferenceSelectionReferenceableTest

class EntityReferenceSelectionReferenceableTest extends KernelTestBase {
    use EntityReferenceFieldCreationTrait;
    
    /**
     * Bundle of 'entity_test_no_label' entity.
     *
     * @var string
     */
    protected $bundle;
    
    /**
     * Labels to be tested.
     *
     * @var array
     */
    protected static $labels = [
        'abc',
        'Xyz_',
        'xyabz_',
        'foo_',
        'bar_',
        'baz_',
        'șz_',
        NULL,
        '<strong>',
    ];
    
    /**
     * The selection handler.
     *
     * @var \Drupal\Core\Entity\EntityReferenceSelection\SelectionInterface
     */
    protected $selectionHandler;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'user',
        'field',
        'node',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('entity_test_no_label');
        $this->installEntitySchema('node');
        
        /** @var \Drupal\Core\Entity\EntityStorageInterface $storage */
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage('entity_test_no_label');
        // Create a new node-type.
        NodeType::create([
            'type' => $node_type = $this->randomMachineName(),
            'name' => $this->randomString(),
        ])
            ->save();
        // Create an entity reference field targeting 'entity_test_no_label'
        // entities.
        $field_name = $this->randomMachineName();
        $this->createEntityReferenceField('node', $node_type, $field_name, $this->randomString(), 'entity_test_no_label');
        $field_config = FieldConfig::loadByName('node', $node_type, $field_name);
        $this->selectionHandler = $this->container
            ->get('plugin.manager.entity_reference_selection')
            ->getSelectionHandler($field_config);
        // Generate a bundle name to be used with 'entity_test_no_label'.
        $this->bundle = $this->randomMachineName();
        // Create 6 entities to be referenced by the field.
        foreach (static::$labels as $name) {
            $storage->create([
                'id' => $this->randomMachineName(),
                'name' => $name,
                'type' => $this->bundle,
            ])
                ->save();
        }
    }
    
    /**
     * Tests referenceable entities with no target entity type 'label' key.
     *
     * @see \Drupal\Core\Entity\EntityReferenceSelection\SelectionInterface::getReferenceableEntities()
     *
     * @param mixed $match
     *   The input text to be checked.
     * @param string $match_operator
     *   The matching operator.
     * @param int $limit
     *   The limit of returning records.
     * @param int $count_limited
     *   The expected number of limited entities to be retrieved.
     * @param array $items
     *   Array of entity labels expected to be returned.
     * @param int $count_all
     *   The total number (unlimited) of entities to be retrieved.
     *
     * @dataProvider providerTestCases
     */
    public function testReferenceablesWithNoLabelKey($match, $match_operator, $limit, $count_limited, array $items, $count_all) : void {
        // Test ::getReferenceableEntities().
        $referenceables = $this->selectionHandler
            ->getReferenceableEntities($match, $match_operator, $limit);
        // Number of returned items.
        if (empty($count_limited)) {
            $this->assertArrayNotHasKey($this->bundle, $referenceables);
        }
        else {
            $this->assertCount($count_limited, $referenceables[$this->bundle]);
        }
        // Test returned items.
        foreach ($items as $item) {
            // SelectionInterface::getReferenceableEntities() always return escaped
            // entity labels.
            // @see \Drupal\Core\Entity\EntityReferenceSelection\SelectionInterface::getReferenceableEntities()
            $item = is_string($item) ? Html::escape($item) : $item;
            $this->assertContainsEquals($item, $referenceables[$this->bundle]);
        }
        // Test ::countReferenceableEntities().
        $count_referenceables = $this->selectionHandler
            ->countReferenceableEntities($match, $match_operator);
        $this->assertSame($count_referenceables, $count_all);
    }
    
    /**
     * Provides test cases for ::testReferenceablesWithNoLabelKey() test.
     *
     * @return array[]
     */
    public static function providerTestCases() {
        return [
            // All referenceables, no limit. Expecting 9 items.
[
                NULL,
                'CONTAINS',
                0,
                9,
                static::$labels,
                9,
            ],
            // Referenceables containing 'w', no limit. Expecting no item.
[
                'w',
                'CONTAINS',
                0,
                0,
                [],
                0,
            ],
            // Referenceables starting with 'w', no limit. Expecting no item.
[
                'w',
                'STARTS_WITH',
                0,
                0,
                [],
                0,
            ],
            // Referenceables containing 'ab', no limit. Expecting 2 items ('abc',
            // 'xyabz').
[
                'ab',
                'CONTAINS',
                0,
                2,
                [
                    'abc',
                    'xyabz_',
                ],
                2,
            ],
            // Referenceables starting with 'A', no limit. Expecting 1 item ('abc').
[
                'A',
                'STARTS_WITH',
                0,
                1,
                [
                    'abc',
                ],
                1,
            ],
            // Referenceables containing '_', limited to 3. Expecting 3 limited items
            // ('Xyz_', 'xyabz_', 'foo_') and 5 total.
[
                '_',
                'CONTAINS',
                3,
                3,
                [
                    'Xyz_',
                    'xyabz_',
                    'foo_',
                ],
                6,
            ],
            // Referenceables ending with 'z_', limited to 3. Expecting 3 limited
            // items ('Xyz_', 'xyabz_', 'baz_') and 4 total.
[
                'z_',
                'ENDS_WITH',
                3,
                3,
                [
                    'Xyz_',
                    'xyabz_',
                    'baz_',
                ],
                4,
            ],
            // Referenceables identical with 'xyabz_', no limit. Expecting 1 item
            // ('xyabz_').
[
                'xyabz_',
                '=',
                0,
                1,
                [
                    'xyabz_',
                ],
                1,
            ],
            // Referenceables greater than 'foo', no limit. Expecting 4 items ('Xyz_',
            // 'xyabz_', 'foo_', 'șz_').
[
                'foo',
                '>',
                0,
                4,
                [
                    'Xyz_',
                    'xyabz_',
                    'foo_',
                    'șz_',
                ],
                4,
            ],
            // Referenceables greater or identical with 'baz_', no limit. Expecting 5
            // items ('Xyz_', 'xyabz_', 'foo_', 'baz_', 'șz_').
[
                'baz_',
                '>=',
                0,
                5,
                [
                    'Xyz_',
                    'xyabz_',
                    'foo_',
                    'baz_',
                    'șz_',
                ],
                5,
            ],
            // Referenceables less than 'foo', no limit. Expecting 5 items ('abc',
            // 'bar_', 'baz_', NULL, '<strong>').
[
                'foo',
                '<',
                0,
                5,
                [
                    'abc',
                    'bar_',
                    'baz_',
                    NULL,
                    '<strong>',
                ],
                5,
            ],
            // Referenceables less or identical with 'baz_', no limit. Expecting 5
            // items ('abc', 'bar_', 'baz_', NULL, '<strong>').
[
                'baz_',
                '<=',
                0,
                5,
                [
                    'abc',
                    'bar_',
                    'baz_',
                    NULL,
                    '<strong>',
                ],
                5,
            ],
            // Referenceables not identical with 'baz_', no limit. Expecting 7 items
            // ('abc', 'Xyz_', 'xyabz_', 'foo_', 'bar_', 'șz_', NULL, '<strong>').
[
                'baz_',
                '<>',
                0,
                8,
                [
                    'abc',
                    'Xyz_',
                    'xyabz_',
                    'foo_',
                    'bar_',
                    'șz_',
                    NULL,
                    '<strong>',
                ],
                8,
            ],
            // Referenceables in ('bar_', 'baz_'), no limit. Expecting 2 items
            // ('bar_', 'baz_')
[
                [
                    'bar_',
                    'baz_',
                ],
                'IN',
                0,
                2,
                [
                    'bar_',
                    'baz_',
                ],
                2,
            ],
            // Referenceables not in ('bar_', 'baz_'), no limit. Expecting 6 items
            // ('abc', 'Xyz_', 'xyabz_', 'foo_', 'șz_', NULL, '<strong>')
[
                [
                    'bar_',
                    'baz_',
                ],
                'NOT IN',
                0,
                7,
                [
                    'abc',
                    'Xyz_',
                    'xyabz_',
                    'foo_',
                    'șz_',
                    NULL,
                    '<strong>',
                ],
                7,
            ],
            // Referenceables not null, no limit. Expecting 9 items ('abc', 'Xyz_',
            // 'xyabz_', 'foo_', 'bar_', 'baz_', 'șz_', NULL, '<strong>').
            //
            // Note: Even we set the name as NULL, when retrieving the label from the
            // entity we'll get an empty string, meaning that this match operator
            // will return TRUE every time.
[
                NULL,
                'IS NOT NULL',
                0,
                9,
                static::$labels,
                9,
            ],
            // Referenceables null, no limit. Expecting 9 items ('abc', 'Xyz_',
            // 'xyabz_', 'foo_', 'bar_', 'baz_', 'șz_', NULL, '<strong>').
            //
            // Note: Even we set the name as NULL, when retrieving the label from the
            // entity we'll get an empty string, meaning that this match operator
            // will return FALSE every time.
[
                NULL,
                'IS NULL',
                0,
                9,
                static::$labels,
                9,
            ],
            // Referenceables containing '<strong>' markup, no limit. Expecting 1 item
            // ('<strong>').
[
                '<strong>',
                'CONTAINS',
                0,
                1,
                [
                    '<strong>',
                ],
                1,
            ],
            // Test an unsupported operator. We expect no items.
[
                'abc',
                '*unsupported*',
                0,
                0,
                [],
                0,
            ],
        ];
    }

}