old_contents: import chai, { expect } from 'chai';
  import sinon            from 'sinon';
  import sinonChai        from 'sinon-chai';
  
  chai.use(sinonChai);
  
  import ResourceTestHelper from './ResourceTestHelper';
  
  import DtmfResource from '../lib/DtmfResource';
  import HttpClient from '../lib/HttpClient';
  import Credentials from '../lib/Credentials';
  
  var creds = Credentials.parse({
    applicationId: 'some-id',
    privateKey: __dirname + '/private-test.key'
  });
  var emptyCallback = () => {};
  
  describe('DtmfResource', () => {
    
    var httpClientStub = null;
    var dtmf = null;
    
    beforeEach(() => {
      httpClientStub = sinon.createStubInstance(HttpClient);
      var options = {
        httpClient: httpClientStub
      };
      dtmf = new DtmfResource(creds, options);
    })
    
    it('should be able to send DTMF to a call', () => {
      const callId = '2342342-lkjhlkjh-32423';
      var params = [1,2,3,4];
      dtmf.send(callId, params, emptyCallback);
      
      var expectedRequestArgs = ResourceTestHelper.requestArgsMatch(params, {
        path: DtmfResource.PATH.replace('{call_uuid}', callId),
        method: 'PUT'
      });
      expect(httpClientStub.request)
        .to.have.been.calledWith(
          sinon.match(expectedRequestArgs),
          emptyCallback
        );
    });
    
  });
  
new_contents: import chai, { expect } from 'chai';
  import sinon            from 'sinon';
  import sinonChai        from 'sinon-chai';
  
  chai.use(sinonChai);
  
  import ResourceTestHelper from './ResourceTestHelper';
  
  import DtmfResource from '../lib/DtmfResource';
  import HttpClient from '../lib/HttpClient';
  import Credentials from '../lib/Credentials';
  
  var creds = Credentials.parse({
    applicationId: 'some-id',
    privateKey: __dirname + '/private-test.key'
  });
  var emptyCallback = () => {};
  
  describe('DtmfResource', () => {
    
    var httpClientStub = null;
    var dtmf = null;
    
    beforeEach(() => {
      httpClientStub = sinon.createStubInstance(HttpClient);
      var options = {
        httpClient: httpClientStub
      };
      dtmf = new DtmfResource(creds, options);
    })
    
    it('should be able to send DTMF to a call', () => {
      const callId = '2342342-lkjhlkjh-32423';
      var params = {digits: [1,2,3,4]};
      dtmf.send(callId, params, emptyCallback);
      
      var expectedRequestArgs = ResourceTestHelper.requestArgsMatch(params, {
        path: DtmfResource.PATH.replace('{call_uuid}', callId),
        method: 'PUT'
      });
      expect(httpClientStub.request)
        .to.have.been.calledWith(
          sinon.match(expectedRequestArgs),
          emptyCallback
        );
    });
    
  });
  
subject: Update params to send object literal with `digits` property