/// <summary>
/// Verifies that the provided object did not raise INotifyPropertyChanged.PropertyChanged as a result of executing the given
/// test code.
/// </summary>
/// <typeparam name="TDeclaring">The type of object declaring the property</typeparam>
/// <typeparam name="TValue">The value of the property</typeparam>
/// <param name="object">The object declaring the property</param>
/// <param name="property">The property</param>
/// <param name="testCode">The code that should not change the property</param>
public static void PropertyDoesNotChange <TDeclaring, TValue>(TDeclaring @object, Expression <Func <TDeclaring, TValue> > property, Assert.PropertyChangedDelegate testCode)
where TDeclaring : INotifyPropertyChanged
{
object sender = null;
PropertyChangedEventArgs args = null;
PropertyChangedEventHandler handler = (o, e) =>
{
sender = o;
args = e;
};
try
{
@object.PropertyChanged += handler;
testCode();
}
finally
{
@object.PropertyChanged -= handler;
}
if (args != null && ReferenceEquals(sender, @object))
{
string propertyName = Reflect.PropertyOf(property).Name;
if (args.PropertyName == propertyName)
{
throw new PropertyDoesNotChangeException(propertyName);
}
}
}
/// <summary>
/// Verifies that the provided object raised INotifyPropertyChanged.PropertyChanged as a result of executing the given
/// test code.
/// </summary>
/// <typeparam name="TDeclaring">The type of object declaring the property</typeparam>
/// <typeparam name="TValue">The value of the property</typeparam>
/// <param name="object">The object declaring the property</param>
/// <param name="property">The property</param>
/// <param name="testCode">The code that should change the property</param>
public static void PropertyChanged <TDeclaring, TValue>(TDeclaring @object, Expression <Func <TDeclaring, TValue> > property, Assert.PropertyChangedDelegate testCode)
where TDeclaring : INotifyPropertyChanged
{
Assert.PropertyChanged(@object, Reflect.PropertyOf(property).Name, testCode);
}