class CategoryAutocompleteTest

class CategoryAutocompleteTest extends UnitTestCase {
    
    /**
     * The autocomplete controller.
     *
     * @var \Drupal\block\Controller\CategoryAutocompleteController
     */
    protected $autocompleteController;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $block_manager = $this->createMock('Drupal\\Core\\Block\\BlockManagerInterface');
        $block_manager->expects($this->any())
            ->method('getCategories')
            ->willReturn([
            'Comment',
            'Node',
            'None & Such',
            'User',
        ]);
        $this->autocompleteController = new CategoryAutocompleteController($block_manager);
    }
    
    /**
     * Tests the autocomplete method.
     *
     * @param string $string
     *   The string entered into the autocomplete.
     * @param array $suggestions
     *   The array of expected suggestions.
     *
     * @see \Drupal\block\Controller\CategoryAutocompleteController::autocomplete()
     *
     * @dataProvider providerTestAutocompleteSuggestions
     */
    public function testAutocompleteSuggestions($string, $suggestions) : void {
        $suggestions = array_map(function ($suggestion) {
            return [
                'value' => $suggestion,
                'label' => Html::escape($suggestion),
            ];
        }, $suggestions);
        $result = $this->autocompleteController
            ->autocomplete(new Request([
            'q' => $string,
        ]));
        $this->assertSame($suggestions, json_decode($result->getContent(), TRUE));
    }
    
    /**
     * Data provider for testAutocompleteSuggestions().
     *
     * @return array
     */
    public static function providerTestAutocompleteSuggestions() {
        $test_parameters = [];
        $test_parameters[] = [
            'string' => 'Com',
            'suggestions' => [
                'Comment',
            ],
        ];
        $test_parameters[] = [
            'string' => 'No',
            'suggestions' => [
                'Node',
                'None & Such',
            ],
        ];
        $test_parameters[] = [
            'string' => 'us',
            'suggestions' => [
                'User',
            ],
        ];
        $test_parameters[] = [
            'string' => 'Banana',
            'suggestions' => [],
        ];
        return $test_parameters;
    }

}