class DisplayExtenderTest

class DisplayExtenderTest extends ViewsKernelTestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view',
    ];
    
    /**
     * Tests display extenders.
     */
    public function testDisplayExtenders() {
        $this->config('views.settings')
            ->set('display_extenders', [
            'display_extender_test',
        ])
            ->save();
        $this->assertCount(1, Views::getEnabledDisplayExtenders(), 'Make sure that there is only one enabled display extender.');
        $view = Views::getView('test_view');
        $view->initDisplay();
        $this->assertCount(1, $view->display_handler
            ->getExtenders(), 'Make sure that only one extender is initialized.');
        $display_extender = $view->display_handler
            ->getExtenders()['display_extender_test'];
        $this->assertInstanceOf(DisplayExtenderTestData::class, $display_extender);
        $view->preExecute();
        $this->assertTrue($display_extender->testState['preExecute'], 'Make sure the display extender was able to react on preExecute.');
        $view->execute();
        $this->assertTrue($display_extender->testState['query'], 'Make sure the display extender was able to react on query.');
    }
    
    /**
     * Tests display extenders validation.
     */
    public function testDisplayExtendersValidate() {
        $this->config('views.settings')
            ->set('display_extenders', [
            'display_extender_test_3',
        ])
            ->save();
        $view = Views::getView('test_view');
        $errors = $view->validate();
        foreach ($view->displayHandlers as $id => $display) {
            $this->assertArrayHasKey($id, $errors);
            $this->assertContains('Display extender test error.', $errors[$id], new FormattableMarkup('Error message found for @id display', [
                '@id' => $id,
            ]));
        }
    }

}