def test_existent_path_selects_relevant_ops():
result = reduce(DIFF, ['key2'])
assert result == (
('change', (), 'old2', 'new2'),
('add', ('suba', ), 'olda', 'newa'),
('remove', ('subb', ), 'oldb', 'newb'),
)
def adjust_cause(self, cause: execution.CauseT) -> execution.CauseT:
if self.field is not None and isinstance(cause, causes.ChangingCause):
old = dicts.resolve(cause.old, self.field, None)
new = dicts.resolve(cause.new, self.field, None)
diff = diffs.reduce(cause.diff, self.field)
new_cause = dataclasses.replace(cause, old=old, new=new, diff=diff)
return cast(execution.CauseT, new_cause) # TODO: mypy bug?
else:
return cause
def test_overly_specific_path_dives_into_dicts_for_change():
result = reduce(DIFF, ['key4', 'subc'])
assert result == (('change', (), 'oldc', 'newc'), )
def test_overly_specific_path_dives_into_dicts_for_removal():
result = reduce(DIFF, ['key4', 'suba'])
assert result == (('remove', (), 'olda', None), )
def test_overly_specific_path_dives_into_dicts_for_addition():
result = reduce(DIFF, ['key4', 'subb'])
assert result == (('add', (), None, 'newb'), )
def test_nonexistent_path_selects_nothing(path):
result = reduce(DIFF, path)
assert result == ()
def test_empty_path_selects_all_ops():
result = reduce(DIFF, [])
assert result == DIFF
def test_type_ignored_for_inputs_but_is_tuple_for_output(diff, path):
result = reduce(diff, path)
assert result == (('op', (), 'old', 'new'), )