def test_nested_changeSet(self):
model = [0, 1, 2, 3]
um = UndoManager()
_ = um.setModel(model)
with um.changeSet(title="outer"):
with pytest.raises(UndoManagerError):
with um.changeSet(title="inner"):
pass
def test_undo_within_changeSet(self):
model = [0, 1, 2, 3]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="test 2"):
proxy.append(4)
assert model == [0, 1, 2, 3, 4]
with um.changeSet(title="test"):
with pytest.raises(UndoManagerError):
um.undo()
def test_changeMonitor(self):
changes = []
um = UndoManager(changeMonitor=changes.append)
proxy = um.setModel({})
with um.changeSet():
proxy["a"] = 1
proxy["b"] = 2
proxy["c"] = [3, 4, 5]
assert len(changes) == 1
changeSet = changes[-1]
expectedChanges = [
Change(op='add', path=('a',), value=1),
Change(op='add', path=('b',), value=2),
Change(op='add', path=('c',), value=[3, 4, 5]),
]
assert list(changeSet) == expectedChanges
with um.changeSet():
proxy["c"][2] = {}
proxy["c"][2]["x"] = "abc"
assert len(changes) == 2
changeSet = changes[-1]
expectedChanges = [
Change(op='replace', path=('c', 2), value={'x': 'abc'}), # odd but expected: mutable value on stack
Change(op='add', path=('c', 2, 'x'), value='abc'),
]
assert list(changeSet) == expectedChanges
um.undo()
assert len(changes) == 3
changeSet = changes[-1]
expectedChanges = [
Change(op='remove', path=('c', 2, 'x'), value=None),
Change(op='replace', path=('c', 2), value=5),
]
assert list(changeSet) == expectedChanges
um.undo()
assert len(changes) == 4
changeSet = changes[-1]
expectedChanges = [
Change(op='remove', path=('c',), value=None),
Change(op='remove', path=('b',), value=None),
Change(op='remove', path=('a',), value=None),
]
assert list(changeSet) == expectedChanges
um.redo()
assert len(changes) == 5
changeSet = changes[-1]
expectedChanges = [
Change(op='add', path=('a',), value=1),
Change(op='add', path=('b',), value=2),
Change(op='add', path=('c',), value=[3, 4, 5]),
]
assert list(changeSet) == expectedChanges
def test_dictionary_multiple(self):
model = {}
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="dict test"):
proxy["a"] = 12
with um.changeSet(title="dict test multiple"):
proxy["a"] = 13
proxy["a"] = 14
um.undo()
assert model["a"] == 12
um.redo()
assert model["a"] == 14
def test_set_add_discard(self):
model = {1, 3, 5, 7}
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="add existing value"):
proxy.add(3) # already there
assert len(um.undoStack) == 0
with um.changeSet(title="remove non-existing value"):
proxy.discard(2)
assert len(um.undoStack) == 0
with um.changeSet(title="remove non-existing value"):
with pytest.raises(KeyError):
proxy.remove(2)
assert len(um.undoStack) == 0
def test_list_append(self):
model = [0, 1, 2, 3]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="list test"):
proxy.append("a")
proxy.append("b")
assert len(um.undoStack) == 1
assert len(um.redoStack) == 0
assert model == [0, 1, 2, 3, "a", "b"]
for a, b in zip(model, proxy):
assert a == b
assert um.undoInfo() == {"title": "list test"}
assert um.redoInfo() is None
assert len(um.undoStack) == 1
assert len(um.redoStack) == 0
um.undo()
assert um.undoInfo() is None
assert um.redoInfo() == {"title": "list test"}
assert len(um.undoStack) == 0
assert len(um.redoStack) == 1
assert model == [0, 1, 2, 3]
um.redo()
assert model == [0, 1, 2, 3, "a", "b"]
with pytest.raises(UndoManagerError):
um.redo()
def test_empty_changeSet(self):
model = [0, 1, 2, 3]
um = UndoManager()
_ = um.setModel(model)
with um.changeSet(title="test"):
# nothing
pass
assert len(um.undoStack) == 0
def test_module_docstring_example(self):
model = [1, 2, 3, {"a": 123}]
um = UndoManager()
proxy = um.setModel(model)
# Modifications must be done within a change set context:
with um.changeSet(title="replace list item"):
proxy[1] = 2000
assert model[1] == 2000
um.undo()
assert model[1] == 2
um.redo()
assert model[1] == 2000
with um.changeSet(title="replace nested dict item"):
proxy[3]["a"] = 456
assert model[3]["a"] == 456
um.undo()
assert model[3]["a"] == 123
def test_custom_proxy():
model = MyCustomModel(10)
um = UndoManager()
proxy = um.setModel(model)
assert type(proxy) == MyCustomUndoProxy
with um.changeSet(title="move"):
proxy.move(10)
assert model.position == 20
um.undo()
assert model.position == 10
def test_list_replace2(self):
model = ["a", "b", "c"]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="list test"):
proxy[1] = "B"
assert proxy[1] == model[1] == "B"
um.undo()
assert model == ["a", "b", "c"]
um.redo()
assert model == ["a", "B", "c"]
def test_list_remove(self):
model = [0, 1, 2, 3]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="list test"):
del proxy[2]
assert model == [0, 1, 3]
um.undo()
assert model == [0, 1, 2, 3]
um.redo()
assert model == [0, 1, 3]
def test_set(self):
model = {1, 3, 5, 7}
um = UndoManager()
proxy = um.setModel(model)
assert 1 in proxy
assert 2 not in proxy
assert set(proxy) == model
with um.changeSet(title="add item"):
proxy.add(9)
with um.changeSet(title="remove item"):
proxy.remove(3)
assert 3 not in proxy
assert 3 not in model
assert 9 in proxy
assert 9 in model
assert set(proxy) == {1, 5, 7, 9}
um.undo()
assert set(proxy) == {1, 3, 5, 7, 9}
um.undo()
assert set(proxy) == {1, 3, 5, 7}
def test_list_insert_double(self):
model = [0, 1, 2, 3]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="list test"):
proxy.insert(2, "a")
proxy.insert(2, "b")
assert model == [0, 1, "b", "a", 2, 3]
um.undo()
assert model == [0, 1, 2, 3]
um.redo()
assert model == [0, 1, "b", "a", 2, 3]
def test_modify_error(self):
model = _error_dict()
um = UndoManager()
proxy = um.setModel(model)
with pytest.raises(ValueError):
with um.changeSet(title="error test"):
proxy["a"] = 12
assert um._currentChanges is None
assert "a" not in model
# assert that we *didn't* record an undo change
assert len(um.undoStack) == 0
assert len(um.undoStack) == 0
def test_undoInfo(self):
model = [1, "a", "Q"]
um = UndoManager()
proxy = um.setModel(model)
assert um.undoInfo() is None
assert um.redoInfo() is None
with um.changeSet(title="undo action", more="any info"):
proxy[1] = 2000
assert um.undoInfo() == {'more': 'any info', 'title': 'undo action'}
assert um.redoInfo() is None
um.undo()
assert um.undoInfo() is None
assert um.redoInfo() == {'more': 'any info', 'title': 'undo action'}
um.redo()
assert um.undoInfo() == {'more': 'any info', 'title': 'undo action'}
assert um.redoInfo() is None
um.undo()
assert um.undoInfo() is None
with um.changeSet(title="another"):
proxy[1] = 2000
assert um.undoInfo() == {'title': 'another'}
assert um.redoInfo() is None
def test_object(self):
model = _AttributeObject()
um = UndoManager()
proxy = um.setModel(model)
assert model.__dict__ == {}
with um.changeSet(title="object test"):
proxy.foo = 12
assert model.__dict__ == {"foo": 12}
assert proxy.foo == model.foo
um.undo()
assert model.__dict__ == {}
um.redo()
assert model.__dict__ == {"foo": 12}
with um.changeSet(title="object test 2"):
del proxy.foo
assert model.__dict__ == {}
um.undo()
assert model.__dict__ == {"foo": 12}
with pytest.raises(AssertionError):
proxy.bar = 123
with um.changeSet(title="replace test"):
proxy.foo = 123
def test_tuple_atomic(self):
model = [1, 2, (3, 4, 5), 6, 7]
um = UndoManager()
proxy = um.setModel(model)
assert proxy[2] == (3, 4, 5)
assert type(proxy[2]) == tuple
with um.changeSet(title="replace item"):
proxy[1] = (200, 300)
assert model[1] == (200, 300)
assert type(proxy[1]) == tuple
assert type(model[1]) == tuple
assert model == [1, (200, 300), (3, 4, 5), 6, 7]
um.undo()
assert model == [1, 2, (3, 4, 5), 6, 7]
def test_rollback_after_error(self):
model = [1, 2, _error_dict()]
um = UndoManager()
proxy = um.setModel(model)
with pytest.raises(ValueError):
with um.changeSet(title="error test"):
assert len(model) == 3
proxy.append(12)
assert len(model) == 4
proxy[1] = 200
assert model[1] == 200
proxy[2]["a"] = 300
# assert that the first two changes have been rolled back
assert model == [1, 2, _error_dict()]
def test_set_insert(self):
model = [1, 2, 3, 4]
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="insert set"):
proxy[1] = {1, 2, 3}
assert model == [1, {1, 2, 3}, 3, 4]
assert proxy[1] == {1, 2, 3}
assert isinstance(proxy[1], Set)
assert not isinstance(proxy[1], set) # it's an UndoProxy after all
um.undo()
assert model == [1, 2, 3, 4]
um.redo()
assert model == [1, {1, 2, 3}, 3, 4]
def test_dictionary_non_str_keys(self):
model = {}
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="dict test"):
proxy[1.5] = 12
proxy[10] = 120
proxy[("T", "o")] = -30
um.undo()
assert 1.5 not in model
assert 10 not in model
assert ("T", "o") not in model
um.redo()
assert model[1.5] == 12
assert model[10] == 120
assert model[("T", "o")] == -30
with um.changeSet(title="dict test"):
del proxy[1.5]
del proxy[10]
del proxy[("T", "o")]
assert 1.5 not in model
assert 10 not in model
assert ("T", "o") not in model
def test_dictionary(self):
model = {}
um = UndoManager()
proxy = um.setModel(model)
with um.changeSet(title="dict test"):
proxy["a"] = 12
assert model == {"a": 12}
assert model["a"] == proxy["a"]
with um.changeSet(title="dict test 2"):
proxy["a"] = 1200
assert model == {"a": 1200}
with um.changeSet(title="dict test 3"):
proxy["b"] = 24
assert model == {"a": 1200, "b": 24}
um.undo()
assert model == {"a": 1200}
um.undo()
assert model == {"a": 12}
um.undo()
assert model == {}
um.redo()
um.redo()
um.redo()
assert model == {"a": 1200, "b": 24}
um.undo()
with um.changeSet(title="dict test 4"):
proxy["c"] = 48
# assert model == {"a": 1200, "c": 24}
assert model == {"a": 1200, "c": 48}
with pytest.raises(UndoManagerError):
um.redo()
with um.changeSet(title="dict test 5"):
del proxy["a"]
assert model == {"c": 48}
um.undo()
um.undo()
assert model == {"a": 1200}