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 CanExecuteReturnsTrueWithoutCanExecuteDelegate()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatableCanExecuteObserverCommand <object>(handlers.Execute, new CommandManagerObserver());
var condition = command.CanExecute(null);
Assert.True(condition);
}
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));
}
public void CanExecuteCallsPassedInCanExecuteDelegate()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatableCanExecuteObserverCommand <object>(
handlers.Execute,
handlers.CanExecute,
new CommandManagerObserver());
var parameter = new object();
handlers.CanExecuteReturnValue = true;
var actual = command.CanExecute(parameter);
Assert.AreSame(parameter, handlers.CanExecuteParameter);
Assert.AreEqual(handlers.CanExecuteReturnValue, actual);
}
public void ShouldPassParameterInstanceOnCanExecute()
{
var canExecuteCalled = false;
var testClass = new MyClass();
ICommand command = new ActivatableCanExecuteObserverCommand <MyClass>(
p => { },
delegate(MyClass parameter)
{
Assert.AreSame(testClass, parameter);
canExecuteCalled = true;
return(true);
},
new DummyObserver());
command.CanExecute(testClass);
Assert.True(canExecuteCalled);
}