Use Async / Await

describe("# Private Method", () => {
  describe("_fetchAndParseSubModules()", () => {
    it("should get equal result compare with legacy fetchAndParse submoudles", async () => {
      const legacyRes = await _legacyFetchAndParseSubModules();
      const res = await _fetchAndParseSubModules();
      expect(res).to.be.deep.equal(legacyRes);
    });
  });
});