public void Ctor_Collection_ContainsItems()
{
var expectedItems = new List <TestItem>
{
new TestItem(),
new TestItem(),
new TestItem()
};
var subject = new ChangeTrackingCollection <TestItem>(expectedItems);
Assert.Equal(expectedItems.Count, subject.Count);
Assert.Same(expectedItems[0], subject.ElementAt(0));
Assert.Same(expectedItems[1], subject.ElementAt(1));
Assert.Same(expectedItems[2], subject.ElementAt(2));
}