diff --git a/tests/manual/selection-handler.html b/tests/manual/selection-handler.html
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--- /dev/null
+++ b/tests/manual/selection-handler.html
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+
+
+
+
+LTR UI
+
+
+
Heading 1
+
Paragraph
+
+
Paragraph
+
+
+RTL UI
+
+
+
Heading 1
+
Paragraph
+
+
Paragraph
+
diff --git a/tests/manual/selection-handler.js b/tests/manual/selection-handler.js
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+++ b/tests/manual/selection-handler.js
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+/**
+ * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
+ * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
+ */
+
+/* globals console, window, document */
+
+import Widget from '../../src/widget';
+import { toWidget } from '../../src/utils';
+import ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';
+import ArticlePluginSet from '@ckeditor/ckeditor5-core/tests/_utils/articlepluginset';
+
+function MyPlugin( editor ) {
+ editor.model.schema.register( 'div', {
+ allowIn: [ '$root' ],
+ isObject: true
+ } );
+
+ editor.conversion.for( 'downcast' ).elementToElement( {
+ model: 'div',
+ view: ( modelElement, writer ) => {
+ return toWidget( writer.createContainerElement( 'div', {
+ class: 'widget'
+ } ),
+ writer,
+ { hasSelectionHandler: true } );
+ }
+ } );
+
+ editor.conversion.for( 'upcast' ).elementToElement( {
+ model: 'div',
+ view: 'div'
+ } );
+}
+
+const config = {
+ plugins: [ ArticlePluginSet, Widget, MyPlugin ],
+ toolbar: [
+ 'heading',
+ '|',
+ 'bold',
+ 'italic',
+ 'link',
+ 'bulletedList',
+ 'numberedList',
+ 'blockQuote',
+ 'insertTable',
+ 'mediaEmbed',
+ 'undo',
+ 'redo'
+ ],
+ image: {
+ toolbar: [ 'imageStyle:full', 'imageStyle:side', '|', 'imageTextAlternative' ]
+ },
+ table: {
+ contentToolbar: [
+ 'tableColumn',
+ 'tableRow',
+ 'mergeTableCells'
+ ]
+ }
+};
+
+ClassicEditor
+ .create( document.querySelector( '#editor-ltr' ), config )
+ .then( editor => {
+ window.editorLtr = editor;
+ } )
+ .catch( err => {
+ console.error( err.stack );
+ } );
+
+ClassicEditor
+ .create( document.querySelector( '#editor-rtl' ), Object.assign( {}, config, {
+ language: 'ar'
+ } ) )
+ .then( editor => {
+ window.editorRtl = editor;
+ } )
+ .catch( err => {
+ console.error( err.stack );
+ } );
diff --git a/tests/manual/selection-handler.md b/tests/manual/selection-handler.md
new file mode 100644
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+++ b/tests/manual/selection-handler.md
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+# Widget selection handler
+
+**Note**: For the best testing, run manual tests adding Arabic to [additional languages configuration](https://ckeditor.com/docs/ckeditor5/latest/framework/guides/contributing/testing-environment.html#running-manual-tests).
+
+---
+
+1. Focus the widget.
+1. The outline of the widget and the selection handler should be continuous.
+1. The selection handler should be attached to the top of the widget.
+
+## LTR
+
+1. The selection handler should be displayed on the **left** side of the widget.
+
+## RTL
+
+1. The selection handler should be displayed on the **right** side of the widget.