public void TestUpdateItemsRemovesCorrectItems()
{
var source = new TestItemSource();
var items = new List <Item> ();
items.Add(new Common.TextItem("bar"));
items.Add(new Common.TextItem("baz"));
List <Item> items_removed = null;
source.ItemsAvailable += delegate { };
source.ItemsUnavailable += delegate(object sender, ItemsUnavailableEventArgs e) {
items_removed = new List <Item> (e.unavailableItems);
};
// Add items to Universe...
source.next_items = items;
source.UpdateAndEmit();
//...now remove them.
source.next_items = new List <Item> ();
source.UpdateAndEmit();
CollectionAssert.AreEqual(items, items_removed);
}
public void TestMultipleUpdatesProduceCorrectItems()
{
var source = new TestItemSource();
var items = new List <Item> ();
Item bar = new Common.TextItem("bar");
Item baz = new Common.TextItem("baz");
items.Add(bar);
items.Add(baz);
List <Item> items_removed = null;
List <Item> items_added = null;
source.ItemsAvailable += delegate(object sender, ItemsAvailableEventArgs e) {
items_added = new List <Item> (e.newItems);
};
source.ItemsUnavailable += delegate(object sender, ItemsUnavailableEventArgs e) {
items_removed = new List <Item> (e.unavailableItems);
};
// Add items to Universe...
source.next_items = items;
source.UpdateAndEmit();
CollectionAssert.AreEqual(items, items_added);
Assert.AreEqual(null, items_removed);
items_added = null;
items_removed = null;
// Nothing added, nothing should change
source.UpdateAndEmit();
Assert.AreEqual(null, items_added);
Assert.AreEqual(null, items_removed);
//...now remove something...
items.Remove(bar);
source.next_items = items;
source.UpdateAndEmit();
Assert.AreEqual(null, items_added);
CollectionAssert.AreEqual(new Item[] { bar }, items_removed);
items_added = null;
items_removed = null;
//...finally, add something back.
items.Add(bar);
source.next_items = items;
source.UpdateAndEmit();
CollectionAssert.AreEqual(new Item[] { bar }, items_added);
Assert.AreEqual(null, items_removed);
}
public void TestUpdateItemsRaisesItemsUnavailable()
{
var source = new TestItemSource();
bool itemsUnavailableCalled = false;
source.ItemsUnavailable += delegate(object sender, ItemsUnavailableEventArgs e) {
itemsUnavailableCalled = true;
};
source.ItemsAvailable += delegate {};
source.next_items = new List <Item> ()
{
new Common.TextItem("bar")
};
source.UpdateAndEmit();
source.next_items = new List <Item> ();
source.UpdateAndEmit();
Assert.IsTrue(itemsUnavailableCalled);
}
public void TestUpdateItemsAddsCorrectItems()
{
var source = new TestItemSource();
var items = new List <Item> ();
items.Add(new Common.TextItem("bar"));
items.Add(new Common.TextItem("baz"));
List <Item> items_raised = null;
source.ItemsAvailable += (object sender, ItemsAvailableEventArgs e) => {
items_raised = new List <Item> (e.newItems);
};
source.ItemsUnavailable += delegate { };
source.next_items = items;
source.UpdateAndEmit();
CollectionAssert.AreEqual(items, items_raised);
}