public void BrowsablePointer_IndexIsNullForEmptyCollection()
{
var list = new BrowsableCollectionMock();
var pointer = new BrowsablePointer(list, 0);
Assert.AreEqual(0, pointer.Index);
Assert.IsNull(pointer.Current);
}
public void BrowsablePointer_IndexPointsToFirstItem()
{
var list = new BrowsableCollectionMock(photo1);
var pointer = new BrowsablePointer(list, 0);
Assert.AreEqual(0, pointer.Index);
Assert.AreEqual(photo1, pointer.Current);
}
public void BrowsablePointer_PointsToSecond_WhenThirdIsDeleted()
{
var list = new BrowsableCollectionMock(photo1, photo2, photo3);
var pointer = new BrowsablePointer(list, 2);
list.RemoveAt(2);
Assert.AreEqual(1, pointer.Index);
Assert.AreEqual(photo2, pointer.Current);
}
public void BrowsablePointerTest_IndexIsOutOfBounds()
{
var list = new BrowsableCollectionMock(photo1);
var pointer = new BrowsablePointer(list, 1);
// should this be fixed?
Assert.AreEqual(1, pointer.Index);
Assert.IsNull(pointer.Current);
}
public void BrowsablePointer_StillPointsToSecond_WhenFirstIsDeleted()
{
var list = new BrowsableCollectionMock(photo1, photo2, photo3);
var pointer = new BrowsablePointer(list, 1);
list.RemoveAt(0);
Assert.AreEqual(0, pointer.Index);
Assert.AreEqual(photo2, pointer.Current);
}