gistfile1.js

var sinon = require('sinon');

it("Should be able to set the validation mode", function(done) {
  var spy = sinon.spy(AuthorizeCIM.AuthorizeRequest, 'send');
  var date = new Date();
  var options = {
    customerType: 'individual',
    payment: new Authorize.Payment({
      creditCard: new Authorize.CreditCard({
        cardNumber: '4111111111111111',
        expirationDate: (date.getFullYear()+1) + '-10'
      })
    })
  }

  AuthorizeCIM.createCustomerPaymentProfile({		  
    customerProfileId: this.customerProfileId,
    validationMode: 'liveMode',
    paymentProfile: options
  }, function(err,resp) {
    var call = spy.firstCall;
    expect(call.args[2].validationMode).to.equal('liveMode');    //passes      	
    expect(call.thisValue.validationMode).to.equal('liveMode');  //fails        	
    done();        
  });

});