public void GenericDelegateCommandOfObjectShouldObserveCanExecuteAndObserveOtherProperties()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
ICommand command = new ActivatablePropertyObserverCommand <object>(o => { })
.ObservesCanExecute(commandTestObject.BoolPropertyExpression)
.ObservesProperty(commandTestObject.IntPropertyExpression);
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 GenericDelegateCommandOfNullableIntWithNullableParameterShouldObserveCanExecute()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
ICommand command =
new ActivatablePropertyObserverCommand <int?>(o => { }).ObservesCanExecute(commandTestObject.BoolPropertyExpression);
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 GenericDelegateCommandOfObjectShouldObserveWithOwnerCanExecute()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
ICommand command =
new ActivatablePropertyObserverCommand <object>(o1 => { }).ObservesCanExecute(commandTestObject, o2 => o2.BoolProperty);
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 CanExecuteOfObjectReturnsTrueWithoutCanExecuteDelegate()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatablePropertyObserverCommand <object>(handlers.Execute);
var retVal = command.CanExecute(null);
Assert.True(retVal);
}
public void CanExecuteOfObjectCallsPassedInCanExecuteDelegate()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatablePropertyObserverCommand <object>(handlers.Execute, handlers.CanExecute);
var parameter = new object();
handlers.CanExecuteReturnValue = true;
var retVal = command.CanExecute(parameter);
Assert.AreSame(parameter, handlers.CanExecuteParameter);
Assert.AreEqual(handlers.CanExecuteReturnValue, retVal);
}
public void ShouldPassParameterInstanceOnCanExecute()
{
var canExecuteCalled = false;
var testClass = new MyClass();
ICommand command = new ActivatablePropertyObserverCommand <MyClass>(
p => { },
delegate(MyClass parameter)
{
Assert.AreSame(testClass, parameter);
canExecuteCalled = true;
return(true);
});
command.CanExecute(testClass);
Assert.True(canExecuteCalled);
}
