private void SetupForProperty(ValueStage stage)
{
var behavior = new TestBehavior(stage);
Property = PropertyStub.WithBehaviors(behavior).Of <object>();
VM = ViewModelStub.WithProperties(Property).Build();
Manager = behavior.Manager;
Context = new BehaviorContextStub(VM);
}
public ValidationResultManager(
BehaviorInitializationContext context,
FieldDefinitionGroup fieldGroup,
ValueStage stage
)
{
_resultField = new DynamicFieldAccessor <ValidationResult>(context, fieldGroup);
_property = context.Property;
_stage = stage;
}
public override void NotifyPropertyChanged(IBehaviorContext context, ValueStage stage, TValue oldValue, TValue newValue)
{
var args = ChangeArgs.ViewModelPropertyChanged(
_property,
stage,
oldValue,
newValue,
reason: null
);
context.NotifyChange(args);
}
public void SetValue_RaisesAppropriateChangeNotifications()
{
ValueStage noChangeNotifciation = null;
EmployeeVM vm = EmployeeVM.Create(b => {
b.Check(x => x.NumericProperty).ValueInRange(min: 1, max: 10);
});
Action <int, int, int, ValueStage> testCode = (
oldValue,
oldSourceValue,
newValue,
expectedChangeNotification
) => {
vm.SetValue(x => x.NumericProperty, oldSourceValue);
vm.SetValue(x => x.NumericProperty, oldValue);
vm.OnChangeInvocations.Clear();
vm.SetValue(x => x.NumericProperty, newValue);
IEnumerable <ChangeArgs> args = vm
.OnChangeInvocations
.Where(x => x.ChangeType == ChangeType.PropertyChanged);
if (expectedChangeNotification != null)
{
Assert.AreEqual(1, args.Count(), "Expected a single change notification.");
ChangeArgs arg = args.Single();
Assert.AreEqual(expectedChangeNotification, arg.Stage);
}
else
{
Assert.AreEqual(0, args.Count(), "Expected no change notification.");
}
};
// Valid values: { 5, 6 }, invalid values: { 77, 78 }
ParameterizedTest
// oldValue | oldSourceValue | newValue | expectedChange
.TestCase(5, 5, 5, noChangeNotifciation)
.TestCase(5, 5, 6, ValueStage.ValidatedValue)
.TestCase(5, 5, 77, ValueStage.Value)
.TestCase(77, 5, 77, noChangeNotifciation)
.TestCase(77, 5, 78, ValueStage.Value)
.TestCase(77, 5, 5, ValueStage.Value)
.TestCase(77, 5, 6, ValueStage.ValidatedValue)
.Run(testCode);
}
public static void NotifyPropertyChangedNext <TValue>(
this Behavior behavior,
IBehaviorContext context,
ValueStage stage,
TValue oldValue,
TValue newValue
)
{
IChangeNotifierBehavior <TValue> next;
if (behavior.TryGetBehavior(out next))
{
next.NotifyPropertyChanged(context, stage, oldValue, newValue);
}
}
public TestBehavior(ValueStage stage)
{
_stage = stage;
}
