public void EditingQueryParameterWithProgressiveLoading()
{
IEnumerable <City> cities = new CityData().Cities;
int citiesInWA = cities.Count(c => c.StateName == "WA");
int citiesinOH = cities.Count(c => c.StateName == "OH");
EnqueueCallback(() =>
{
// By using a loadsize of 1, we know the number of loads to be performed is equal to the
// expected city count + 1 (the load that will determine that there are no more records).
this._dds.LoadSize = 1;
this._dds.QueryName = "GetCitiesInState";
this._dds.QueryParameters.Add(new Parameter {
ParameterName = "state", Value = "WA"
});
this._dds.DomainContext = new CityDomainContext();
this._asyncEventFailureMessage = "First Progressive Load";
this._dds.Load();
});
this.AssertLoadingData(citiesInWA + 1, true);
EnqueueCallback(() =>
{
this.ResetLoadState();
Assert.AreEqual <int>(citiesInWA, this._view.Count, "The count should match the number of WA cities after the first progressive load");
Assert.IsTrue(this._view.Cast <City>().All(c => c.StateName == "WA"), "All cities should be in WA after the first progressive load");
this._dds.QueryParameters[0].Value = "OH";
// Calling Refresh will test that the load of FirstItems is deferred properly
this._collectionView.Refresh();
});
this.AssertLoadingData(citiesinOH + 1, true);
EnqueueCallback(() =>
{
this.ResetLoadState();
Assert.AreEqual <int>(citiesinOH, this._view.Count, "The count should match the number of OH cities after the second progressive load");
Assert.IsTrue(this._view.Cast <City>().All(c => c.StateName == "OH"), "All cities should be in OH after the second progressive load");
});
EnqueueTestComplete();
}