it('should return a request/request object listMembers w/ option [raw=true] is called & complete', (done) => {
    const requestObject = mailchimpExport.listMembers({ id: 'listId', raw: true });
    expect(requestObject).to.contain.keys(['__isRequestRequest', 'httpModule', 'agent']);
    requestObject.on('complete', () => done());
  });