public void GroupingInListBoxTest()
{
ObservableCollection <TestClass> collection = new ObservableCollection <TestClass>()
{
new TestClass {
IntProperty = 1, StringProperty = "A"
},
new TestClass {
IntProperty = 2, StringProperty = "B"
},
new TestClass {
IntProperty = 3, StringProperty = "A"
},
new TestClass {
IntProperty = 4, StringProperty = "B"
}
};
PagedCollectionView cv = new PagedCollectionView(collection);
ListBox lb = new ListBox();
lb.ItemsSource = cv;
this.CreateAsyncTask(
lb,
delegate
{
Assert.AreEqual(4, lb.Items.Count);
cv.GroupDescriptions.Add(new PropertyGroupDescription("StringProperty"));
Assert.AreEqual(4, lb.Items.Count);
Assert.AreEqual("A", (lb.Items[0] as TestClass).StringProperty);
Assert.AreEqual("A", (lb.Items[1] as TestClass).StringProperty);
Assert.AreEqual("B", (lb.Items[2] as TestClass).StringProperty);
Assert.AreEqual("B", (lb.Items[3] as TestClass).StringProperty);
cv.PageSize = 3;
cv.MoveToPage(1);
Assert.AreEqual(1, lb.Items.Count);
Assert.AreEqual("B", (lb.Items[0] as TestClass).StringProperty);
TestClass newItem = cv.AddNew() as TestClass;
newItem.StringProperty = "A";
newItem.IntProperty = 5;
// ---------------------
// |Page | 0 | 1 | 2 |
// ---------------------
// | 0 | A | A | B |
// | 1 | B |-A- | | <---- Current Page
Assert.AreEqual("B", (lb.Items[0] as TestClass).StringProperty);
Assert.AreEqual("A", (lb.Items[1] as TestClass).StringProperty);
cv.CommitNew();
// ---------------------
// |Page | 0 | 1 | 2 |
// ---------------------
// | 0 | A | A |-A- |
// | 1 | B | B | | <---- Current Page
Assert.AreEqual("B", (lb.Items[0] as TestClass).StringProperty);
Assert.AreEqual("B", (lb.Items[1] as TestClass).StringProperty);
cv.MoveToFirstPage();
Assert.AreEqual("A", (lb.Items[0] as TestClass).StringProperty);
Assert.AreEqual("A", (lb.Items[1] as TestClass).StringProperty);
Assert.AreEqual("A", (lb.Items[2] as TestClass).StringProperty);
});
EnqueueTestComplete();
}