public void InsertAndClear_BehavesAsExpected()
{
var item1 = new SqlBulkCopyColumnMapping(0, 0);
var item2 = new SqlBulkCopyColumnMapping(1, 1);
var item3 = new SqlBulkCopyColumnMapping(2, 2);
SqlBulkCopyColumnMappingCollection collection = CreateCollection();
collection.Insert(0, item1);
collection.Insert(1, item2);
collection.Insert(2, item3);
Assert.Equal(3, collection.Count);
Assert.Same(item1, collection[0]);
Assert.Same(item2, collection[1]);
Assert.Same(item3, collection[2]);
collection.Clear();
Assert.Equal(0, collection.Count);
collection.Add(item1);
collection.Add(item3);
Assert.Equal(2, collection.Count);
Assert.Same(item1, collection[0]);
Assert.Same(item3, collection[1]);
collection.Insert(1, item2);
Assert.Equal(3, collection.Count);
Assert.Same(item1, collection[0]);
Assert.Same(item2, collection[1]);
Assert.Same(item3, collection[2]);
collection.Clear();
Assert.Equal(0, collection.Count);
IList list = collection;
list.Insert(0, item1);
list.Insert(1, item2);
list.Insert(2, item3);
Assert.Equal(3, list.Count);
Assert.Same(item1, list[0]);
Assert.Same(item2, list[1]);
Assert.Same(item3, list[2]);
list.Clear();
Assert.Equal(0, list.Count);
list.Add(item1);
list.Add(item3);
Assert.Equal(2, list.Count);
Assert.Same(item1, list[0]);
Assert.Same(item3, list[1]);
list.Insert(1, item2);
Assert.Equal(3, list.Count);
Assert.Same(item1, list[0]);
Assert.Same(item2, list[1]);
Assert.Same(item3, list[2]);
list.Clear();
Assert.Equal(0, list.Count);
}