public void ClearAndAddRangeOnlyRaisesOneRemoveCollectionChangedEventAtTheEndIfNoItemsAreAddedAndSomeAreCleared()
{
var oc = new ObservableCollectionEx <string>
{
"Foo",
"Bar"
};
var toAdd = new List <string>();
var itemCount = 0;
var eventCount = 0;
var action = NotifyCollectionChangedAction.Add;
IList <string> removedItems = null;
oc.CollectionChanged += (sender, args) =>
{
++eventCount;
itemCount = oc.Count;
action = args.Action;
removedItems = args.OldItems.OfType <string>().ToList();
};
oc.ClearAndAddRange(toAdd);
itemCount.Should().Be(0);
eventCount.Should().Be(1);
action.Should().Be(NotifyCollectionChangedAction.Remove);
removedItems.ShouldBeEquivalentTo(new List <string>
{
"Foo",
"Bar"
});
}
private async Task RefreshSessionAsync()
{
IList <Video> videos;
IList <Server> clients;
try
{
videos = await GetNowPlayingAsync();
}
catch
{
videos = new List <Video>();
}
try
{
clients = await GetClientsAsync();
}
catch
{
clients = new List <Server>();
}
foreach (var video in videos)
{
var client = clients.FirstOrDefault(c => c.Key == video.Player.Key);
if (client != null)
{
video.Player.Client = client;
}
}
_clients.ClearAndAddRange(clients);
_nowPlaying.ClearAndAddRange(videos);
}
public void ClearAndAddRangeOnlyRaisesOneResetCollectionChangedEventAtTheEndIfItemsAreClearedAndAdded()
{
var oc = new ObservableCollectionEx <string>
{
"Existing",
"Items"
};
var toAdd = new List <string>
{
"Foo",
"Bar"
};
var itemCount = 0;
var eventCount = 0;
var action = NotifyCollectionChangedAction.Add;
oc.CollectionChanged += (sender, args) =>
{
++eventCount;
itemCount = oc.Count;
action = args.Action;
};
oc.ClearAndAddRange(toAdd);
itemCount.Should().Be(2);
eventCount.Should().Be(1);
action.Should().Be(NotifyCollectionChangedAction.Reset);
}
public void ClearAddRangeDoesntRaiseAnEventIfNothingIsAddedOrCleared()
{
var oc = new ObservableCollectionEx <string>();
var toAdd = new List <string>();
oc.MonitorEvents();
oc.ClearAndAddRange(toAdd);
oc.ShouldNotRaise("CollectionChanged");
}
public void ClearAndAddRangeClearsTheCollectionThenAddsAllTheItems()
{
var oc = new ObservableCollectionEx <string>
{
"Existing",
"Items"
};
var toAdd = new List <string>
{
"Foo",
"Bar"
};
oc.ClearAndAddRange(toAdd);
oc.Should().ContainInOrder(toAdd);
oc.Should().OnlyContain(s => toAdd.Contains(s));
oc.Count.Should().Be(2);
}
public void ClearAndAddRangeWithANullCollectionThrows()
{
var oc = new ObservableCollectionEx <string>();
oc.ClearAndAddRange(null);
}
public void ClearAddRangeDoesntRaiseAnEventIfNothingIsAddedOrCleared()
{
var oc = new ObservableCollectionEx<string>();
var toAdd = new List<string>();
oc.MonitorEvents();
oc.ClearAndAddRange(toAdd);
oc.ShouldNotRaise("CollectionChanged");
}
public void ClearAndAddRangeWithANullCollectionThrows()
{
var oc = new ObservableCollectionEx<string>();
oc.ClearAndAddRange(null);
}
public void ClearAndAddRangeOnlyRaisesOneResetCollectionChangedEventAtTheEndIfItemsAreClearedAndAdded()
{
var oc = new ObservableCollectionEx<string>
{
"Existing",
"Items"
};
var toAdd = new List<string>
{
"Foo",
"Bar"
};
var itemCount = 0;
var eventCount = 0;
var action = NotifyCollectionChangedAction.Add;
oc.CollectionChanged += (sender, args) =>
{
++eventCount;
itemCount = oc.Count;
action = args.Action;
};
oc.ClearAndAddRange(toAdd);
itemCount.Should().Be(2);
eventCount.Should().Be(1);
action.Should().Be(NotifyCollectionChangedAction.Reset);
}
public void ClearAndAddRangeOnlyRaisesOneRemoveCollectionChangedEventAtTheEndIfNoItemsAreAddedAndSomeAreCleared()
{
var oc = new ObservableCollectionEx<string>
{
"Foo",
"Bar"
};
var toAdd = new List<string>();
var itemCount = 0;
var eventCount = 0;
var action = NotifyCollectionChangedAction.Add;
IList<string> removedItems = null;
oc.CollectionChanged += (sender, args) =>
{
++eventCount;
itemCount = oc.Count;
action = args.Action;
removedItems = args.OldItems.OfType<string>().ToList();
};
oc.ClearAndAddRange(toAdd);
itemCount.Should().Be(0);
eventCount.Should().Be(1);
action.Should().Be(NotifyCollectionChangedAction.Remove);
removedItems.ShouldBeEquivalentTo(new List<string>
{
"Foo",
"Bar"
});
}
public void ClearAndAddRangeClearsTheCollectionThenAddsAllTheItems()
{
var oc = new ObservableCollectionEx<string>
{
"Existing",
"Items"
};
var toAdd = new List<string>
{
"Foo",
"Bar"
};
oc.ClearAndAddRange(toAdd);
oc.Should().ContainInOrder(toAdd);
oc.Should().OnlyContain(s => toAdd.Contains(s));
oc.Count.Should().Be(2);
}
