Solve all the test errors for createReadStream

Mock out add database id for the tests in createReadStream that correspond to createReadStream.

Author: danieljbruce

test/request.ts

@@ -261,6 +261,11 @@ describe('Request', () => {
  describe('createReadStream', () => {
  beforeEach(() => {
  request.request_ = () => {};
+ request.datastore = {
+ addDatabaseIdToRequest(d: any, r: any) {
+ addDatabaseIdToRequest(d, r);
+ },
+ };
  });
 
  it('should throw if no keys are provided', () => {