/// <summary>
/// Creates the lookup property.
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <typeparam name="TItem"></typeparam>
/// <param name="originalValue">The original value.</param>
/// <param name="fillItemsSourceAction">The action that fill the lookup.</param>
/// <returns></returns>
protected ILookupViewModelProperty <TValue, TItem> CreateLookupProperty <TValue, TItem>(TValue originalValue, Func <IEnumerable <TItem> > fillItemsSourceAction)
{
var property = new LookupViewModelProperty <TValue, TItem>(originalValue, fillItemsSourceAction, _observableValidationEngine);
RegisterViewModelProperty(property);
return(property);
}
public void NullSameAsEmptyForStrings()
{
// Prepare
var items = new[] { "1", "2", "3", "4" };
var valueViewModelProperty = new LookupViewModelProperty <string, string>(null, () => items, new ObservableValidationEngine());
// Act
valueViewModelProperty.SelectedValue = String.Empty;
// Verify
Assert.IsFalse(valueViewModelProperty.HasChanged);
}
public void HasChangedIsSupported()
{
// Prepare
var items = new[] { "1", "2", "3", "4" };
var lookupViewModelProperty = new LookupViewModelProperty <string, string>("1", () => items, new ObservableValidationEngine());
// Act
lookupViewModelProperty.SelectedValue = "2";
// Verify
Assert.IsTrue(lookupViewModelProperty.HasChanged);
}
