public void MoveCurrentTest()
{
ObservableCollection <TestData> dataList = new ObservableCollection <TestData>()
{
new TestData()
{
StrValue = "A"
},
new TestData()
{
StrValue = "B"
},
new TestData()
{
StrValue = "C"
}
};
DataGrid dataGrid;
var target = new DataGridCurrentItemService();
var serviceList = new UIServiceCollection();
serviceList.Add(new ServiceFactoryMock(target));
using (TestWindow.Show(dataList, serviceList, out dataGrid))
{
dataGrid.Items.MoveCurrentTo(null);
var helper = new PrivateAccessHelper <DataGridCurrentItemService, DataGridCurrentItemService_Accessor>(target);
var provider = helper.Target;
var previewCurrentChangingEventHandlerHelper = new EventHandlerTestHelper <object, CancelableEventArgs>("PreviewCurrentChanging");
provider.PreviewCurrentChanging += previewCurrentChangingEventHandlerHelper.Handler;
var currentChangedEventHandlerHelper = new EventHandlerTestHelper <object, EventArgs>("CurrentChanged");
provider.CurrentChanged += currentChangedEventHandlerHelper.Handler;
provider.MoveCurrentTo(dataList[1]);
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsTrue(currentChangedEventHandlerHelper.HandlerInvoked);
previewCurrentChangingEventHandlerHelper.Reset();
currentChangedEventHandlerHelper.Reset();
// Block movement.
previewCurrentChangingEventHandlerHelper.AdditionalHandling = (sender, args) => { args.Canceled = true; };
Assert.IsFalse(provider.MoveCurrentTo(dataList[2]));
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsFalse(currentChangedEventHandlerHelper.HandlerInvoked);
previewCurrentChangingEventHandlerHelper.Reset();
currentChangedEventHandlerHelper.Reset();
previewCurrentChangingEventHandlerHelper.AdditionalHandling = null;
// Move to the same row
provider.MoveCurrentTo(provider.CurrentItem);
Assert.IsFalse(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsFalse(currentChangedEventHandlerHelper.HandlerInvoked);
previewCurrentChangingEventHandlerHelper.Reset();
currentChangedEventHandlerHelper.Reset();
provider.CurrentChanged -= currentChangedEventHandlerHelper.Handler;
provider.PreviewCurrentChanging -= previewCurrentChangingEventHandlerHelper.Handler;
}
}
public void PreviewCurrentChangingEventTest()
{
ObservableCollection <TestData> dataList = new ObservableCollection <TestData>()
{
new TestData()
{
StrValue = "A"
},
new TestData()
{
StrValue = "B"
},
new TestData()
{
StrValue = "C"
}
};
DataGrid dataGrid;
var target = new DataGridCurrentItemService();
UIServiceCollection serviceList = new UIServiceCollection();
serviceList.Add(new ServiceFactoryMock(target));
using (TestWindow.Show(dataList, serviceList, out dataGrid))
{
dataGrid.CurrentItem = null;
var helper = new PrivateAccessHelper <DataGridCurrentItemService, DataGridCurrentItemService_Accessor>(target);
var provider = helper.Target;
var previewCurrentChangingEventHandlerHelper = new EventHandlerTestHelper <object, CancelableEventArgs>("PreviewCurrentChanging");
provider.PreviewCurrentChanging += previewCurrentChangingEventHandlerHelper.Handler;
dataGrid.CurrentCell = new DataGridCellInfo(dataList[0], dataGrid.Columns[0]);
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsFalse(previewCurrentChangingEventHandlerHelper.LastInocationEventArgs.IsCancelable);
previewCurrentChangingEventHandlerHelper.Reset();
// Move to another line.
dataGrid.CurrentCell = new DataGridCellInfo(dataList[1], dataGrid.Columns[0]);
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsFalse(previewCurrentChangingEventHandlerHelper.LastInocationEventArgs.IsCancelable);
previewCurrentChangingEventHandlerHelper.Reset();
// Move to another cell on the same line
dataGrid.CurrentCell = new DataGridCellInfo(dataList[1], dataGrid.Columns[1]);
Assert.IsFalse(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
previewCurrentChangingEventHandlerHelper.Reset();
// Move to another line using the provider.
provider.MoveCurrentTo(dataList[2]);
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.HandlerInvoked);
Assert.IsTrue(previewCurrentChangingEventHandlerHelper.LastInocationEventArgs.IsCancelable);
provider.PreviewCurrentChanging -= previewCurrentChangingEventHandlerHelper.Handler;
}
}
