public void ShouldNotMonitorCanExecuteChangedOnDisconnectedCommand()
{
var clickableObject = new MockClickableObject();
var command = new MockCommand();
var behavior = new ButtonBaseClickCommandBehavior(clickableObject);
behavior.Command = command;
behavior.Command = null;
Assert.IsTrue(clickableObject.IsEnabled);
command.CanExecuteReturnValue = false;
command.RaiseCanExecuteChanged();
Assert.IsTrue(clickableObject.IsEnabled);
}
public void ShouldReEnableButtonIfCanExecuteChangedRaises()
{
var clickableObject = new MockClickableObject();
var mockCommand = new MockCommand()
{
CanExecuteReturnValue = false
};
var behavior = new ButtonBaseClickCommandBehavior(clickableObject);
behavior.Command = mockCommand;
Assert.IsFalse(clickableObject.IsEnabled);
mockCommand.CanExecuteReturnValue = true;
mockCommand.RaiseCanExecuteChanged();
Assert.IsTrue(clickableObject.IsEnabled);
}
public void DisposedControlDoesNotThrowOnCanExecuteChanged()
{
var clickableObject = new MockClickableObject();
var command = new MockCommand();
var behavior = new ButtonBaseClickCommandBehavior(clickableObject);
behavior.Command = command;
WeakReference controlWeakReference = new WeakReference(clickableObject);
clickableObject = null;
behavior = null;
GC.Collect();
command.CanExecuteReturnValue = false;
command.RaiseCanExecuteChanged();
}
public void WhenCanExecuteChanged_ThenUpdatesIsEnabledState()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = command;
commandAction.CommandParameter = parameter;
Assert.True(someControl.IsEnabled);
command.CanExecuteReturnValue = false;
command.RaiseCanExecuteChanged();
Assert.NotNull(command.CanExecuteParameter);
Assert.Same(parameter, command.CanExecuteParameter);
Assert.False(someControl.IsEnabled);
}
public void DisposedControlStopsMonitoringCommandAfterFirstCanExecuteChanged()
{
var clickableObject = new MockClickableObject();
var command = new MockCommand();
var behavior = new ButtonBaseClickCommandBehavior(clickableObject);
behavior.Command = command;
clickableObject = null;
WeakReference commandReference = new WeakReference(command);
GC.Collect();
command.CanExecuteReturnValue = false;
command.RaiseCanExecuteChanged();
command = null;
GC.Collect();
Assert.IsFalse(commandReference.IsAlive);
}
