public void GenericObservableCommandOfObjectShouldObserveCanExecuteAndObserveOtherProperties()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var factory = new PropertyObserverFactory();
var canExecuteObserver = factory.ObservesCanExecute(commandTestObject, o => o.BoolProperty);
var observer1 = factory.ObservesProperty(commandTestObject, o => o.IntProperty);
ICommand command =
new ActivatableCanExecuteObserverCommand <object>(o => { }, canExecuteObserver, observer1).Activate();
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
Assert.False(canExecuteChangedRaised);
Assert.False(command.CanExecute(null));
commandTestObject.IntProperty = 10;
Assert.True(canExecuteChangedRaised);
Assert.False(command.CanExecute(null));
canExecuteChangedRaised = false;
Assert.False(canExecuteChangedRaised);
commandTestObject.BoolProperty = true;
Assert.True(canExecuteChangedRaised);
Assert.True(command.CanExecute(null));
}
public void GenericObservableCommandOfNullableIntWithNullableParameterShouldObserveCanExecute()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var factory = new PropertyObserverFactory();
var observer1 = factory.ObservesCanExecute(commandTestObject.BoolPropertyExpression);
ICommand command = new ActivatableCanExecuteObserverCommand <int?>(o => { }, observer1).Activate();
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
Assert.False(canExecuteChangedRaised);
Assert.False(command.CanExecute(null));
commandTestObject.BoolProperty = true;
Assert.True(canExecuteChangedRaised);
Assert.True(command.CanExecute(null));
}
