message: Index command fixes
diff: @@ -36,7 +36,7 @@ describe('Index commands test', () => {
  it('should get index with fail', async () => requestsExecutor
  .execute(new GetIndexCommand('reg', false))
  - .then((result: IRavenResponse) => expect(result).to.be.null)
  + .then((result: IRavenResponse) => expect(result).to.be.undefined)
  );
  it('should delete index with success', async () => {
  @@ -44,7 +44,7 @@ describe('Index commands test', () => {
  return requestsExecutor.execute(new PutIndexesCommand(index))
  .then(() => requestsExecutor.execute(new DeleteIndexCommand('delete')))
  - .then((result) => expect(result).to.be.null);
  + .then((result) => expect(result).to.be.undefined);
  });
  it('should delete index with fail', async () => expect(
  