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Changed null returning value to undefined in core.treeView.Writer#getParentContainer.

Szymon Kupś 9 år sedan
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01a1393f27

+ 2 - 2
packages/ckeditor5-engine/src/treeview/writer.js

@@ -96,14 +96,14 @@ import CKEditorError from '../ckeditorerror.js';
 	 * Position's parent node is checked as first, then next parents are checked.
 	 *
 	 * @param {core.treeView.Position} position Position used as a start point to locate parent container.
-	 * @returns {core.treeView.Element|null} Parent container element or `null` if container is not found.
+	 * @returns {core.treeView.Element|undefined} Parent container element or `undefined` if container is not found.
 	 */
 	getParentContainer( position ) {
 		let parent = position.parent;
 
 		while ( !this.isContainer( parent ) ) {
 			if ( !parent ) {
-				return null;
+				return undefined;
 			}
 			parent = parent.parent;
 		}

+ 2 - 2
packages/ckeditor5-engine/tests/treeview/writer.js

@@ -225,14 +225,14 @@ describe( 'Writer', () => {
 			expect( container ).to.equal( parent );
 		} );
 
-		it( 'should return null if no parent container', () => {
+		it( 'should return undefined if no parent container', () => {
 			const text = new Text( 'foobar' );
 			const b = new Element( 'b', null, [ text ] );
 
 			writer.setPriority( b, 1 );
 			const container = writer.getParentContainer( new Position( text, 0 ) );
 
-			expect( container ).to.equal( null );
+			expect( container ).to.be.undefined;
 		} );
 	} );