public void CanSkipFilteringWithoutComplaining()
{
ItemList fiveItems = CreateItems(5);
CountFilter filter = new CountFilter(0, 10);
filter.Filter(fiveItems);
Assert.AreEqual(5, fiveItems.Count);
}
public void CanFilter_TwoExessiveItems_WithClassInstance()
{
ItemList fiveItems = CreateItems(5);
CountFilter filter = new CountFilter(0, 3);
filter.Filter(fiveItems);
Assert.AreEqual(3, fiveItems.Count);
}
public void CanFilter_FromEnd()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(7, 3);
filter.Filter(items);
Assert.AreEqual(3, items.Count);
Assert.AreEqual(7, items[0].ID);
Assert.AreEqual(8, items[1].ID);
Assert.AreEqual(9, items[2].ID);
}
public void CanFilter_FromStart()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(0, 3);
filter.Filter(items);
Assert.AreEqual(3, items.Count);
Assert.AreEqual(0, items[0].ID);
Assert.AreEqual(1, items[1].ID);
Assert.AreEqual(2, items[2].ID);
}
public void CanFilter_FromMid()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(4, 3);
filter.Filter(items);
Assert.AreEqual(3, items.Count);
Assert.AreEqual(4, items[0].ID);
Assert.AreEqual(5, items[1].ID);
Assert.AreEqual(6, items[2].ID);
}
public void CanFilter_FirstAndLastItems()
{
ItemList fiveItems = CreateItems(5);
ContentItem toBeFirst = fiveItems[1];
ContentItem toBeLast = fiveItems[3];
CountFilter filter = new CountFilter(1, 3);
filter.Filter(fiveItems);
Assert.AreEqual(3, fiveItems.Count);
Assert.AreEqual(toBeFirst, fiveItems[0]);
Assert.AreEqual(toBeLast, fiveItems[2]);
}
public void CanFilter_OneElement_FromEnd()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(9, 1);
filter.Filter(items);
Assert.AreEqual(1, items.Count);
Assert.AreEqual(9, items[0].ID);
}
public void CanFilter_EmptyList_FromStart()
{
ItemList items = CreateItems(0);
CountFilter filter = new CountFilter(3, 2);
filter.Filter(items);
Assert.AreEqual(0, items.Count);
}
public void CanFilter_ZeroElements_FromEnd()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(9, 0);
filter.Filter(items);
Assert.AreEqual(0, items.Count);
}
public void CanFilter_FromEnd_WithInsufficientElements()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(7, 5);
filter.Filter(items);
Assert.AreEqual(3, items.Count);
Assert.AreEqual(7, items[0].ID);
Assert.AreEqual(8, items[1].ID);
Assert.AreEqual(9, items[2].ID);
}
public void CanFilter_FromBeforeStart()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(-10, 3);
filter.Filter(items);
Assert.AreEqual(3, items.Count);
}
public void CanFilter_FromBeyondEnd()
{
ItemList items = CreateItems(10);
CountFilter filter = new CountFilter(10, 3);
filter.Filter(items);
Assert.AreEqual(0, items.Count);
}