it("should insert a valueless attribute before the existing attribute that starts at cursor", function () {
                testDocument.replaceRange("  <input id='foo'>\n", { line: 9, ch: 0 });  // insert new line

                testEditor.setCursorPos({ line: 9, ch: 9 });    // cursor after between "i" and "d"
                selectHint(HTMLCodeHints.attrHintProvider, "checked");