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 ShouldThrowIfExecuteMethodDelegateNull()
{
Assert.Throws <ArgumentNullException>(
() =>
{
var command = new ActivatablePropertyObserverCommand <object>(null);
});
}
public void DelegateCommandOfObjectGenericShouldThrowIfCanExecuteMethodDelegateNull()
{
Assert.Throws <ArgumentNullException>(
() =>
{
var command = new ActivatablePropertyObserverCommand <object>(o => { }, null);
});
}
public void WhenConstructedWithGenericTypeIsNonNullableValueType_Throws()
{
Assert.Throws <InvalidCastException>(
() =>
{
var command = new ActivatablePropertyObserverCommand <int>(param => { });
});
}
public void DelegateCommandOfObjectShouldThrowIfAllDelegatesAreNull()
{
Assert.Throws <ArgumentNullException>(
() =>
{
var command = new ActivatablePropertyObserverCommand <object>(null, 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 IsActivePropertyChangeFiresEventOfObject()
{
var fired = false;
var command = new ActivatablePropertyObserverCommand <object>(this.DoNothing);
command.IsActiveChanged += delegate { fired = true; };
command.Activate();
Assert.True(fired);
}
public void WhenConstructedWithGenericTypeOfObject_InitializesValues()
{
// Prepare
// Act
var actual = new ActivatablePropertyObserverCommand <object>(param => { });
// verify
Assert.NotNull(actual);
}
public void ExecuteCallsPassedInExecuteDelegate()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatablePropertyObserverCommand <object>(handlers.Execute);
var parameter = new object();
command.Execute(parameter);
Assert.AreSame(parameter, handlers.ExecuteParameter);
}
public void GenericDelegateCommandOfObjectObservingPropertyWithOwnerShouldRaiseOnEmptyPropertyName()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var command = new ActivatablePropertyObserverCommand <object>(o => { }).ObservesProperty(commandTestObject, o => o.IntProperty);
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
commandTestObject.RaisePropertyChanged(string.Empty);
Assert.True(canExecuteChangedRaised);
}
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 GenericDelegateCommandOfObjectShouldNotObserveWithOwnerDuplicateProperties()
{
var commandTestObject = new CommandTestObject();
Assert.Throws <ArgumentException>(
() =>
{
var command = new ActivatablePropertyObserverCommand <object>(o => { })
.ObservesProperty(commandTestObject, o => o.IntProperty)
.ObservesProperty(commandTestObject, o => o.IntProperty);
});
}
public void GenericDelegateCommandOfObjectShouldNotObserveWithOwnerDuplicateCanExecute()
{
var commandTestObject = new CommandTestObject();
Assert.Throws <ArgumentException>(
() =>
{
ICommand command = new ActivatablePropertyObserverCommand <object>(o => { })
.ObservesCanExecute(commandTestObject, o1 => o1.BoolProperty)
.ObservesCanExecute(commandTestObject, o2 => o2.BoolProperty);
});
}
public void RaiseCanExecuteChangedRaisesCanExecuteChanged()
{
var handlers = new DelegateObjectHandlers();
var command = new ActivatablePropertyObserverCommand <object>(handlers.Execute);
var canExecuteChangedRaised = false;
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
command.RaiseCanExecuteChanged();
Assert.True(canExecuteChangedRaised);
}
public void GenericDelegateCommandOfObjectNotObservingPropertiesShouldNotRaiseOnEmptyPropertyName()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var command = new ActivatablePropertyObserverCommand <object>(o => { });
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
commandTestObject.RaisePropertyChanged(null);
Assert.False(canExecuteChangedRaised);
}
public void GenericDelegateCommandOfObjectShouldObserveOneProperty()
{
var canExecuteChangedRaised = false;
var commandTestObject = new CommandTestObject();
var command =
new ActivatablePropertyObserverCommand <object>(o => { }).ObservesProperty(commandTestObject.IntPropertyExpression);
command.CanExecuteChanged += delegate { canExecuteChangedRaised = true; };
commandTestObject.IntProperty = 10;
Assert.True(canExecuteChangedRaised);
}
public void CanRemoveCanExecuteOfObjectChangedHandler()
{
var command = new ActivatablePropertyObserverCommand <object>(o => { });
var canExecuteChangedRaised = false;
void Handler(object s, EventArgs e) => canExecuteChangedRaised = true;
command.CanExecuteChanged += Handler;
command.CanExecuteChanged -= Handler;
command.RaiseCanExecuteChanged();
Assert.False(canExecuteChangedRaised);
}
public void ShouldPassParameterInstanceOnExecute()
{
var executeCalled = false;
var testClass = new MyClass();
ICommand command = new ActivatablePropertyObserverCommand <MyClass>(
delegate(MyClass parameter)
{
Assert.AreSame(testClass, parameter);
executeCalled = true;
});
command.Execute(testClass);
Assert.True(executeCalled);
}
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 GenericDelegateCommandOfObjectShouldObserveComplexPropertyWhenParentPropertyIsNull()
{
var canExecuteChangedRaise = false;
var commandTestObject = new CommandTestObject {
ComplexProperty = new ComplexType()
};
var command = new ActivatablePropertyObserverCommand <object>(o => { }).ObservesProperty(
commandTestObject.ComplexPropertyInnerComplexPropertyIntPropertyExpression);
command.CanExecuteChanged += delegate { canExecuteChangedRaise = true; };
var newComplexObject = new ComplexType {
InnerComplexProperty = new ComplexType {
IntProperty = 10
}
};
commandTestObject.ComplexProperty.InnerComplexProperty = newComplexObject;
Assert.True(canExecuteChangedRaise);
}
public void GenericDelegateCommandOfObjectPropertyObserverWithOwnerUnsubscribeUnusedListeners()
{
var canExecuteChangedRaiseCount = 0;
var commandTestObject = new CommandTestObject
{
ComplexProperty = new ComplexType
{
IntProperty = 1,
InnerComplexProperty = new ComplexType
{
IntProperty = 1,
InnerComplexProperty =
new ComplexType
{
IntProperty = 1
}
}
}
};
var command = new ActivatablePropertyObserverCommand <object>(o => { })
.ObservesProperty(commandTestObject, o => o.ComplexProperty.IntProperty)
.ObservesProperty(
commandTestObject,
o => o.ComplexProperty.InnerComplexProperty.InnerComplexProperty.IntProperty)
.ObservesProperty(commandTestObject, o => o.ComplexProperty.InnerComplexProperty.IntProperty);
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());
}
public void IsActivePropertyIsFalseByDefaultOfObject()
{
var command = new ActivatablePropertyObserverCommand <object>(this.DoNothing);
Assert.False(command.IsActive);
}
