it("should replace the unquoted attribute value with the selected attribute value in quotes", function () {
                // Insert an unquoted attribute between <div and id on line 5.
                testDocument.replaceRange("dir=ltr ", { line: 5, ch: 6 });
                testEditor.setCursorPos({ line: 5, ch: 10 });
                // Select "rtl" to replace "ltr"