/// <summary>
/// Redo the latest change.
/// </summary>
public void Redo()
{
root.Redo();
}
public void SplitSelectedTrackSegmentCommandTest(int trackNumber, int frameNumber, int[] expectedToSplitKeyFrameNumbers, int[] expectedSplitKeyFrameNumbers)
{
SetupViewModel(useRealUndoService: true);
IScriptVideoContext svc = _scriptVideoContextMock.Object;
if (_viewModel.SelectedTrack.TrackNumber != trackNumber)
{
_viewModel.SelectedTrack = _viewModel.TimelineTrackCollection[trackNumber];
}
if (svc.FrameNumber != frameNumber)
{
svc.FrameNumber = frameNumber;
}
Assert.NotNull(_viewModel.TimelineSegmentProvidingViewModel.SelectedSegment);
SegmentViewModelBase segmentViewModelToSplit = _viewModel.TimelineSegmentProvidingViewModel.SelectedSegment;
int originalEndFrame = segmentViewModelToSplit.EndFrame;
int[] originalKeyFrameNumbers = segmentViewModelToSplit.KeyFrameViewModels.Select(kfvm => kfvm.FrameNumber).ToArray();
Assert.True(
_viewModel.SplitSelectedTrackSegmentCommand.CanExecute()
);
_viewModel.SplitSelectedTrackSegmentCommand.Execute();
SegmentViewModelBase splitSegmentViewModel;
RunPreUndoTests();
_undoRoot.Undo();
RunPostUndoTests();
_undoRoot.Redo();
RunPreUndoTests();
void RunPreUndoTests()
{
Assert.NotNull(_viewModel.TimelineSegmentProvidingViewModel.SelectedSegment);
Assert.NotSame(segmentViewModelToSplit, _viewModel.TimelineSegmentProvidingViewModel.SelectedSegment);
Assert.False(
_viewModel.SplitSelectedTrackSegmentCommand.CanExecute()
);
splitSegmentViewModel = _viewModel.TimelineSegmentProvidingViewModel.SelectedSegment;
Assert.Equal(frameNumber - 1, segmentViewModelToSplit.EndFrame);
Assert.Equal(expectedToSplitKeyFrameNumbers.Length, segmentViewModelToSplit.KeyFrameViewModels.Count);
for (int i = 0; i < expectedToSplitKeyFrameNumbers.Length; i++)
{
Assert.Equal(expectedToSplitKeyFrameNumbers[i], segmentViewModelToSplit.KeyFrameViewModels[i].FrameNumber);
}
Assert.Equal(frameNumber, splitSegmentViewModel.StartFrame);
Assert.Equal(originalEndFrame, splitSegmentViewModel.EndFrame);
Assert.Equal(expectedSplitKeyFrameNumbers.Length, splitSegmentViewModel.KeyFrameViewModels.Count);
for (int i = 0; i < expectedSplitKeyFrameNumbers.Length; i++)
{
Assert.Equal(expectedSplitKeyFrameNumbers[i], splitSegmentViewModel.KeyFrameViewModels[i].FrameNumber);
}
Assert.True(_undoRoot.CanUndo);
}
void RunPostUndoTests()
{
Assert.Same(segmentViewModelToSplit, _viewModel.TimelineSegmentProvidingViewModel.SelectedSegment);
Assert.DoesNotContain(splitSegmentViewModel, _viewModel.TimelineSegments);
Assert.True(
_viewModel.SplitSelectedTrackSegmentCommand.CanExecute()
);
Assert.Equal(originalEndFrame, segmentViewModelToSplit.EndFrame);
Assert.Equal(originalKeyFrameNumbers.Length, segmentViewModelToSplit.KeyFrameViewModels.Count);
for (int i = 0; i < originalKeyFrameNumbers.Length; i++)
{
Assert.Equal(originalKeyFrameNumbers[i], segmentViewModelToSplit.KeyFrameViewModels[i].FrameNumber);
}
Assert.True(_undoRoot.CanRedo);
}
}