public void WhenMemberChainContainsCastingOperator_ThenBuildProperListener()
{
var target = new NotifyingSampleObject();
var listener = new PropertyChangedHelper().BuildListener(target, x => (x.Child as NotifyingSampleObject2).Child, _dummyCallback);
Assert.IsTrue(listener != null);
}
public void WhenMemberChainContainsMethod_ThenThrowNotSupportedExceptionOnBuilding()
{
var target = new NotifyingSampleObject();
Assert.ThrowsException <NotSupportedException>(() =>
{
var listener = new PropertyChangedHelper().BuildListener(target, x => x.SampleMethod().NotNotifyingChild, _dummyCallback);
});
}
public void ExecutionContext_ExecutionState()
{
GeneticAlgorithm algorithm = Mock.Of <GeneticAlgorithm>();
ExecutionContext context = new ExecutionContext(algorithm);
PropertyChangedHelper.VerifyPropertyChangedEvent(
context, nameof(ExecutionContext.ExecutionState), ExecutionState.Running,
v => context.ExecutionState = v, () => context.ExecutionState);
}
public void ExecutionContext_AlgorithmException()
{
GeneticAlgorithm algorithm = Mock.Of <GeneticAlgorithm>();
ExecutionContext context = new ExecutionContext(algorithm);
PropertyChangedHelper.VerifyPropertyChangedEvent(
context, nameof(ExecutionContext.AlgorithmException), new ArgumentException(),
v => context.AlgorithmException = v, () => context.AlgorithmException);
}
public void PropertyNotifyExtensionsRaiseEvent()
{
bool changedEventRaised = false;
bool changingEventRaised = false;
var myobj = new PropertyChangedHelper();
myobj.PropertyChanged += (sender, args) => changedEventRaised = true;
myobj.PropertyChanging += (sender, args) => changingEventRaised = true;
myobj.Name = "im trying to raise events";
Assert.IsTrue(changedEventRaised);
Assert.IsTrue(changingEventRaised);
}
public void WhenObservedPropertyChanges_ThenCallbackIsInvoked()
{
bool wasCalled = false;
var target = new NotifyingSampleObject()
{
Child = new NotifyingSampleObject()
{
Value = "foo"
}
};
var listener = new PropertyChangedHelper().BuildListener(target, x => x.Child.Value, () => { wasCalled = true; });
target.Child.Value = "bar";
Assert.IsTrue(wasCalled);
}
public void WhenListenerIsDisposed_ThenCallbackIsNoLongerInvoked()
{
bool wasCalled = false;
var target = new NotifyingSampleObject()
{
Child = new NotifyingSampleObject()
{
Value = "foo"
}
};
var listener = new PropertyChangedHelper().BuildListener(target, x => x.Child.Value, () => wasCalled = true);
listener.Dispose();
target.Child.Value = "bar";
Assert.IsFalse(wasCalled);
}
protected void OnPropertyChanged <T>(Expression <Func <T> > propertyExpression)
{
PropertyChangedHelper.RaisePropertyChanged(this, propertyExpression, PropertyChanged);
}
