public void When_PropertyChanged_Suppressed_Then_NotifyPropertyChanged_Does_Not_Fire_PropertyChanged()
{
// Arrange
var eventCount = 0;
var sut = new CollectionChangedHelper<int>(this);
sut.PropertyChanged += (sender, args) => ++eventCount;
// Act
using (sut.SuppressPropertyChanged())
sut.NotifyPropertyChanged("Age", "UserData-1");
// Assert
Assert.AreEqual(0, eventCount);
}
public void When_NotifyPropertyValueChanged_Then_Fires_PropertyChange_On_Event_With_Correct_Values()
{
// Arrange
var propertyChanges = new List<PropertyChangedEventArgsEx>();
var sut = new CollectionChangedHelper<int>(this);
sut.PropertyChanged += (sender, args) => propertyChanges.Add((PropertyChangedEventArgsEx) args);
var expectedPropertyChange = new PropertyChangedEventArgsEx("Age", "UserData-2");
// Act
sut.NotifyPropertyChanged("Age", "UserData-2");
// Assert
Assert.AreEqual(1, propertyChanges.Count);
Assert.AreEqual(expectedPropertyChange, propertyChanges[0]);
}
public void When_NotifyReplace_Then_Action_Replace_Raised()
{
// Arrange
var sut = new CollectionChangedHelper<int>(this);
var results = new List<NotifyCollectionChangedEventArgs>();
var expected = new[]
{
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, 12, (object) 14, 9),
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace, 100, (object) 200, 80),
};
sut.CollectionChanged += (o, e) => results.Add(e);
// Act
sut.NotifyReplace(12, 14, 9);
sut.NotifyReplace(100, 200, 80);
// Assert
KKAssert.AreEqualByValue(expected, results);
}
public void When_NotifyAdd_Then_Action_Add_Raised()
{
// Arrange
var sut = new CollectionChangedHelper<int>(this);
var results = new List<NotifyCollectionChangedEventArgs>();
var expected = new[]
{
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, 10, 0),
new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, 99, 1),
};
sut.CollectionChanged += (o, e) => results.Add(e);
// Act
sut.NotifyAdd(10, 0);
sut.NotifyAdd(99, 1);
// Assert
KKAssert.AreEqualByValue(expected, results);
}
private async void CameraRoll_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
await CollectionChangedHelper.Handle <VideoItem>(_cameraRoll, e);
}
private async void Shows_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
await CollectionChangedHelper.Handle <TvShow>(_shows, e);
}
public void When_SetPropertyValue_New_Value_Then_Fires_PropertyChanged()
{
// Arrange
var propertyChanges = new List<PropertyChangedEventArgsEx>();
var sut = new CollectionChangedHelper<int>(this);
sut.PropertyChanged += (sender, args) => propertyChanges.Add((PropertyChangedEventArgsEx) args);
var age = 10;
var expectedPropertyChange = new PropertyChangedEventArgsEx("Age", "UserData-1");
// Act
sut.SetPropertyValue(ref age, 17, "Age", "UserData-1");
// Assert
Assert.AreEqual(1, propertyChanges.Count);
Assert.AreEqual(expectedPropertyChange, propertyChanges[0]);
}
public void When_SetPropertyValue_Same_Value_Then_Does_Not_Fire_PropertyChanged()
{
// Arrange
var eventCount = 0;
var sut = new CollectionChangedHelper<int>(this);
sut.PropertyChanged += (sender, args) => ++eventCount;
;
var age = 10;
// Act
sut.SetPropertyValue(ref age, 10, "Age", "UserData-1");
// Assert
Assert.AreEqual(0, eventCount);
}
