public void OperatesAfterCollection()
{
var view = new DependencyObject();
var cmd = new CommandAction(view, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
GC.Collect();
View.SetActionTarget(view, this.target);
cmd.Execute(null);
Assert.IsTrue(this.target.DoSomethingCalled);
}
public void ExecuteThrowsIfTargetIsDefault()
{
View.SetActionTarget(this.subject, View.InitialActionTarget);
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.Throws<ActionNotSetException>(() => cmd.Execute(null));
}
public void DoesNotRetainTarget()
{
var view = new DependencyObject();
var weakView = new WeakReference(view);
View.SetActionTarget(view, this.target);
var cmd = new CommandAction(view, null, "DoSomethingWithGuard", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
view = null;
cmd = null;
GC.Collect();
Assert.False(weakView.IsAlive);
}
public void PropagatesGuardPropertException()
{
var cmd = new CommandAction(this.subject, null, "DoSomethingWithUnsuccessfulGuardMethod", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
var e = Assert.Throws<InvalidOperationException>(() => cmd.CanExecute(null));
Assert.AreEqual("foo", e.Message);
}
public void ControlIsEnabledIfTargetIsDefault()
{
View.SetActionTarget(this.subject, View.InitialActionTarget);
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.True(cmd.CanExecute(null));
}
public void ThrowsIfActionNonExistentBehaviourIsThrowAndActionIsNonExistent()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.DoesNotThrow(() => View.SetActionTarget(this.subject, new Target2()));
Assert.Throws<ActionNotFoundException>(() => cmd.Execute(null));
}
public void EnablesIfTargetAndActionExistAndNoGuardMethod()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.True(cmd.CanExecute(null));
}
public void ExecuteDoesNothingIfActionIsNull()
{
var cmd = new CommandAction(this.subject, null, "DoesNotExist", ActionUnavailableBehaviour.Enable, ActionUnavailableBehaviour.Enable);
View.SetActionTarget(this.subject, null);
Assert.DoesNotThrow(() => cmd.Execute(null));
}
public void ExecuteCallsMethod()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Enable, ActionUnavailableBehaviour.Enable);
cmd.Execute(null);
Assert.True(this.target.DoSomethingCalled);
}
public void RaisesEventWhenGuardValueChanges()
{
this.target.CanDoSomethingWithGuard = false;
var cmd = new CommandAction(this.subject, null, "DoSomethingWithGuard", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
bool eventRaised = false;
cmd.CanExecuteChanged += (o, e) => eventRaised = true;
this.target.CanDoSomethingWithGuard = true;
Assert.True(eventRaised);
}
public void RaisesEventWhenTargetChanges()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Disable, ActionUnavailableBehaviour.Disable);
bool eventRaised = false;
cmd.CanExecuteChanged += (o, e) => eventRaised = true;
View.SetActionTarget(this.subject, null);
Assert.True(eventRaised);
}
public void ChangesEnabledStateWhenGuardChanges()
{
this.target.CanDoSomethingWithGuard = false;
var cmd = new CommandAction(this.subject, null, "DoSomethingWithGuard", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.False(cmd.CanExecute(null));
this.target.CanDoSomethingWithGuard = true;
Assert.True(cmd.CanExecute(null));
}
public void IgnoresGuardIfGuardDoesNotReturnBool()
{
var cmd = new CommandAction(this.subject, null, "DoSomethingWithBadGuard", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.True(cmd.CanExecute(true));
}
public void DisablesIfTargetAndActionExistAndGuardMethodReturnsFalse()
{
this.target.CanDoSomethingWithGuard = false;
var cmd = new CommandAction(this.subject, null, "DoSomethingWithGuard", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
Assert.False(cmd.CanExecute(null));
}
public void ThrowsIfTargetNullBehaviourIsThrowAndTargetBecomesNull()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Disable);
Assert.Throws<ActionTargetNullException>(() => View.SetActionTarget(this.subject, null));
}
public void ExecutePassesArgumentIfGiven()
{
var cmd = new CommandAction(this.subject, null, "DoSomethingWithArgument", ActionUnavailableBehaviour.Enable, ActionUnavailableBehaviour.Enable);
var arg = "hello";
cmd.Execute(arg);
Assert.AreEqual("hello", this.target.DoSomethingArgument);
}
public void EnablesIfTargetNullBehaviourIsEnableAndTargetIsNull()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Enable, ActionUnavailableBehaviour.Disable);
View.SetActionTarget(this.subject, null);
Assert.True(cmd.CanExecute(null));
}
public void PropagatesActionException()
{
var cmd = new CommandAction(this.subject, null, "DoSomethingUnsuccessfully", ActionUnavailableBehaviour.Enable, ActionUnavailableBehaviour.Enable);
var e = Assert.Throws<InvalidOperationException>(() => cmd.Execute(null));
Assert.AreEqual("woo", e.Message);
}
public void UsesBackupSubjectIfActionTargetNotAvailable()
{
var view = new DependencyObject();
var backupView = new DependencyObject();
var cmd = new CommandAction(view, backupView, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Throw);
View.SetActionTarget(backupView, this.target);
view.SetValue(FrameworkElement.DataContextProperty, this.target);
cmd.Execute(null);
Assert.IsTrue(this.target.DoSomethingCalled);
}
public void EnablesIfActionNonExistentBehaviourIsThrowAndActionIsNonExistent()
{
var cmd = new CommandAction(this.subject, null, "DoSomething", ActionUnavailableBehaviour.Throw, ActionUnavailableBehaviour.Enable);
View.SetActionTarget(this.subject, new Target2());
Assert.True(cmd.CanExecute(null));
}
