mocking collection behavior with Moq
- by Stephen Patten
Hello,
I've read through some of the discussions on the Moq user group and have failed to find an example and have been so far
unable to find the scenario that I have. Here is my question and code:
// 6 periods
var schedule = new List<PaymentPlanPeriod>()
{
new PaymentPlanPeriod(1000m, args.MinDate.ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(1).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(2).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(3).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(4).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(5).ToString())
};
// Now the proxy is correct with the schedule
helper.Setup(h => h.GetPlanPeriods(It.IsAny<String>(), schedule));
Then in my tests I use Periods but the Mocked _PaymentPlanHelper never populates the collection, see below for usage:
public IEnumerable<PaymentPlanPeriod> Periods
{
get
{
if (CanCalculateExpression())
_PaymentPlanHelper.GetPlanPeriods(this.ToString(), _PaymentSchedule);
return _PaymentSchedule;
}
}
Now if I change the mocked object to use another overloaded method of GetPlanPeriods that returns a List like so :
var schedule = new List<PaymentPlanPeriod>()
{
new PaymentPlanPeriod(1000m, args.MinDate.ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(1).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(2).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(3).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(4).ToString()),
new PaymentPlanPeriod(1000m, args.MinDate.Value.AddMonths(5).ToString())
};
helper.Setup(h => h.GetPlanPeriods(It.IsAny<String>())).Returns(new List<PaymentPlanPeriod>(schedule));
List<PaymentPlanPeriod> result = new _PaymentPlanHelper.GetPlanPeriods(this.ToString());
This works as expected. Any pointers would be awesome, as long as you don't bash my architecture... :)
Thank you,
Stephen
