Added integration test.

packages/ckeditor5-clipboard/tests/pasting-integration.js

@@ -191,6 +191,25 @@ describe( 'Pasting – integration', () => {
 				} );
 		} );
 	} );
+
+	describe( 'links', () => {
+		// See https://github.com/ckeditor/ckeditor5/issues/15036.
+		it( 'should not convert parts of the link address which look like HTML entities', () => {
+			return ClassicTestEditor
+				.create( element, { plugins: [ Clipboard, Paragraph, Bold, Italic, Link ] } )
+				.then( editor => {
+					setData( editor.model, '<paragraph>[]</paragraph>' );
+
+					pasteText( editor, 'https://example.com?x=1&quot=2&timestamp=t' );
+
+					expect( getData( editor.model ) ).to.equal(
+						'<paragraph>https://example.com?x=1&quot=2&timestamp=t[]</paragraph>' // keeps "&quot" and "&times" unchanged
+					);
+
+					return editor.destroy();
+				} );
+		} );
+	} );
 } );
 
 function pasteHtml( editor, html ) {
@@ -201,6 +220,14 @@ function pasteHtml( editor, html ) {
 	} );
 }
 
+function pasteText( editor, text ) {
+	editor.editing.view.document.fire( 'paste', {
+		dataTransfer: createDataTransfer( { 'text/plain': text } ),
+		stopPropagation() {},
+		preventDefault() {}
+	} );
+}
+
 function createDataTransfer( data ) {
 	return {
 		getData( type ) {