public void GenericObservableCommandOfObjectShouldNotObserveDuplicateProperties()
{
var commandTestObject = new CommandTestObject();
var factory = new PropertyObserverFactory();
var observer1 = factory.ObservesProperty(commandTestObject.IntPropertyExpression);
var observer2 = factory.ObservesProperty(commandTestObject.IntPropertyExpression);
Assert.Throws <ArgumentException>(
() =>
{
var command = new ActivatableCanExecuteObserverCommand <object>(o => { }, observer1, observer2);
});
}
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 GenericObservableCommandOfObjectShouldObserveMultipleProperties()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var factory = new PropertyObserverFactory();
var observer1 = factory.ObservesProperty(commandTestObject.IntPropertyExpression);
var observer2 = factory.ObservesProperty(commandTestObject.BoolPropertyExpression);
var command = new ActivatableCanExecuteObserverCommand <object>(o => { }, observer1, observer2).Activate();
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
commandTestObject.IntProperty = 10;
Assert.True(canExecuteChangedRaised);
canExecuteChangedRaised = false;
commandTestObject.BoolProperty = true;
Assert.True(canExecuteChangedRaised);
}
public void GenericObservableCommandOfObjectShouldObserveComplexPropertyWhenRootPropertyIsNull()
{
var canExecuteChangedRaise = false;
var commandTestObject = new CommandTestObject {
ComplexProperty = null
};
var factory = new PropertyObserverFactory();
var observer1 = factory.ObservesProperty(
commandTestObject.ComplexPropertyInnerComplexPropertyIntPropertyExpression);
var command = new ActivatableCanExecuteObserverCommand <object>(o => { }, observer1).Activate();
command.CanExecuteChanged += delegate { canExecuteChangedRaise = true; };
var newComplexObject = new ComplexType {
InnerComplexProperty = new ComplexType {
IntProperty = 10
}
};
commandTestObject.ComplexProperty = newComplexObject;
Assert.True(canExecuteChangedRaise);
}
public void GenericObservableCommandOfObjectPropertyObserverWithOwnerUnsubscribeUnusedListeners()
{
var canExecuteChangedRaiseCount = 0;
var commandTestObject = new CommandTestObject
{
ComplexProperty = new ComplexType
{
IntProperty = 1,
InnerComplexProperty = new ComplexType
{
IntProperty = 1,
InnerComplexProperty =
new ComplexType
{
IntProperty = 1
}
}
}
};
var factory = new PropertyObserverFactory();
var observer1 = factory.ObservesProperty(commandTestObject, o => o.ComplexProperty.IntProperty);
var observer2 = factory.ObservesProperty(
commandTestObject,
o => o.ComplexProperty.InnerComplexProperty.IntProperty);
var observer3 = factory.ObservesProperty(
commandTestObject,
o => o.ComplexProperty.InnerComplexProperty.InnerComplexProperty.IntProperty);
var command = new ActivatableCanExecuteObserverCommand <object>(o => { }, observer1, observer2, observer3).Activate();
command.CanExecuteChanged += delegate { canExecuteChangedRaiseCount++; };
commandTestObject.ComplexProperty.IntProperty = 2;
commandTestObject.ComplexProperty.InnerComplexProperty.InnerComplexProperty.IntProperty = 2;
commandTestObject.ComplexProperty.InnerComplexProperty.IntProperty = 2;
Assert.AreEqual(3, canExecuteChangedRaiseCount);
var innerInnerComplexProp = commandTestObject.ComplexProperty.InnerComplexProperty.InnerComplexProperty;
var innerComplexProp = commandTestObject.ComplexProperty.InnerComplexProperty;
var complexProp = commandTestObject.ComplexProperty;
commandTestObject.ComplexProperty = new ComplexType
{
InnerComplexProperty = new ComplexType
{
InnerComplexProperty =
new ComplexType()
}
};
Assert.AreEqual(0, innerInnerComplexProp.GetPropertyChangedSubscribedLength());
Assert.AreEqual(0, innerComplexProp.GetPropertyChangedSubscribedLength());
Assert.AreEqual(0, complexProp.GetPropertyChangedSubscribedLength());
innerInnerComplexProp = commandTestObject.ComplexProperty.InnerComplexProperty.InnerComplexProperty;
innerComplexProp = commandTestObject.ComplexProperty.InnerComplexProperty;
complexProp = commandTestObject.ComplexProperty;
commandTestObject.ComplexProperty = null;
Assert.AreEqual(0, innerInnerComplexProp.GetPropertyChangedSubscribedLength());
Assert.AreEqual(0, innerComplexProp.GetPropertyChangedSubscribedLength());
Assert.AreEqual(0, complexProp.GetPropertyChangedSubscribedLength());
}