public void RemoveRangeTest()
{
ObservableCollectionExt <TestClass> collection = new ObservableCollectionExt <TestClass>();
var obj1 = new TestClass {
Id = 1, Value = "one"
};
var obj2 = new TestClass {
Id = 2, Value = "two"
};
var obj3 = new TestClass {
Id = 3, Value = "three"
};
var obj4 = new TestClass {
Id = 4, Value = "four"
};
collection.AddRange(new List <TestClass> {
obj1, obj2, obj3, obj4
});
int counter = 0;
collection.CollectionChanged += (s, e) => counter++;
collection.RemoveItems(new List <TestClass> {
obj2, obj4
});
Assert.AreEqual(1, counter);
Assert.AreEqual(2, collection.Count);
Assert.AreEqual(1, collection[0].Id);
Assert.AreEqual(3, collection[1].Id);
}