class FormErrorHandlerFileUploadTest

class FormErrorHandlerFileUploadTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node',
        'file',
        'field_ui',
        'inline_form_errors',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create a node type for testing.
        NodeType::create([
            'type' => 'page',
            'name' => 'page',
        ])->save();
        // Add a file field.
        FieldStorageConfig::create([
            'entity_type' => 'node',
            'field_name' => 'field_ief_file',
            'type' => 'file',
            'cardinality' => 1,
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_ief_file',
            'label' => 'field_ief_file',
            'entity_type' => 'node',
            'bundle' => 'page',
            'required' => TRUE,
            'settings' => [
                'file_extensions' => 'png gif jpg jpeg',
            ],
        ])->save();
        EntityFormDisplay::create([
            'targetEntityType' => 'node',
            'bundle' => 'page',
            'mode' => 'default',
            'status' => TRUE,
        ])->setComponent('field_ief_file', [
            'type' => 'file_generic',
            'settings' => [],
        ])
            ->save();
        EntityViewDisplay::create([
            'targetEntityType' => 'node',
            'bundle' => 'page',
            'mode' => 'default',
            'status' => TRUE,
            'label' => 'hidden',
            'type' => 'file_default',
        ])->save();
        // Create and login a user.
        $account = $this->drupalCreateUser([
            'access content',
            'access administration pages',
            'administer nodes',
            'create page content',
        ]);
        $this->drupalLogin($account);
    }
    
    /**
     * Tests that the required field error is displayed as inline error message.
     */
    public function testFileUploadErrors() {
        $this->drupalGet('node/add/page');
        $edit = [
            'edit-title-0-value' => $this->randomString(),
        ];
        $this->submitForm($edit, 'Save');
        $error_text = $this->getSession()
            ->getPage()
            ->find('css', '.field--name-field-ief-file .form-item--error-message')
            ->getText();
        $this->assertEquals('field_ief_file field is required.', $error_text);
    }

}