public void Test_AddAll_OnExtendedObservableCollection_Ok()
{
ICollection <int> collection = new ExtendedObservableCollection <int> {
0
};
collection.AddAll(new List <int> {
1, 2
});
Assert.Equal(3, collection.Count);
Assert.Contains(collection, number => number == 0);
Assert.Contains(collection, number => number == 1);
Assert.Contains(collection, number => number == 2);
}
