Added constant EMPTY_OBJECT (an empty sealed object) that is used to indicate to the xml library that an empty XML element should be generated, and use it in the JSON hardcoded into the tests.

src/file/table/table-row/table-row.spec.ts

@@ -5,13 +5,15 @@ import { Formatter } from "export/formatter";
 import { TableCell } from "../table-cell";
 import { TableRow } from "./table-row";
 
+import { EMPTY_OBJECT } from "file/xml-components";
+
 describe("TableRow", () => {
     describe("#constructor", () => {
         it("should create with no cells", () => {
             const tableRow = new TableRow([]);
             const tree = new Formatter().format(tableRow);
             expect(tree).to.deep.equal({
-                "w:tr": {},
+                "w:tr": EMPTY_OBJECT,
             });
         });
 
@@ -23,7 +25,7 @@ describe("TableRow", () => {
                     {
                         "w:tc": [
                             {
-                                "w:p": {},
+                                "w:p": EMPTY_OBJECT,
                             },
                         ],
                     },