def test_model_commit_clears_redo_log(self):
model = CanvasModel(self.eb)
model.commit([ Insert(R(1, 1, 1, 1)) ])
model.commit([ Insert(R(2, 2, 2, 2)) ])
model.undo()
model.commit([ Insert(R(3, 3, 3, 3)) ]) # this one clears redo log
assert model._elems == [ R(1, 1, 1, 1), R(3, 3, 3, 3) ]
assert model._changelog == [
[Insert(R(1, 1, 1, 1))],
[Insert(R(3, 3, 3, 3))]
]
assert model._redolog == []
def test_model_one_undo_redo(self):
model = CanvasModel(self.eb)
model.commit([ Insert(R(1, 1, 1, 1)) ])
assert model._elems == [ R(1, 1, 1, 1) ]
assert model._changelog == [ [ Insert(R(1, 1, 1, 1)) ] ]
assert model._redolog == []
model.undo()
assert model._elems == []
assert model._changelog == []
assert model._redolog == [ [ Insert(R(1, 1, 1, 1)) ] ]
model.redo()
assert model._elems == [ R(1, 1, 1, 1) ]
assert model._changelog == [ [ Insert(R(1, 1, 1, 1)) ] ]
assert model._redolog == []
