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#!/usr/bin/env python
#
# Author: Mike McKerns (mmckerns @caltech and @uqfoundation)
# Copyright (c) 2008-2016 California Institute of Technology.
# Copyright (c) 2016-2023 The Uncertainty Quantification Foundation.
# License: 3-clause BSD. The full license text is available at:
# - https://github.com/uqfoundation/dill/blob/master/LICENSE
from dill import __diff as diff
import sys
IS_PYPY = not hasattr(sys, 'getrefcount')
class A:
pass
def test_diff():
a = A()
b = A()
c = A()
a.a = b
b.a = c
diff.memorise(a)
assert not diff.has_changed(a)
c.a = 1
assert diff.has_changed(a)
diff.memorise(c, force=True)
assert not diff.has_changed(a)
c.a = 2
assert diff.has_changed(a)
changed = diff.whats_changed(a)
assert list(changed[0].keys()) == ["a"]
assert not changed[1]
a2 = []
b2 = [a2]
c2 = [b2]
diff.memorise(c2)
assert not diff.has_changed(c2)
a2.append(1)
assert diff.has_changed(c2)
changed = diff.whats_changed(c2)
assert changed[0] == {}
assert changed[1]
a3 = {}
b3 = {1: a3}
c3 = {1: b3}
diff.memorise(c3)
assert not diff.has_changed(c3)
a3[1] = 1
assert diff.has_changed(c3)
changed = diff.whats_changed(c3)
assert changed[0] == {}
assert changed[1]
if not IS_PYPY:
import abc
# make sure the "_abc_invaldation_counter" doesn't make test fail
diff.memorise(abc.ABCMeta, force=True)
assert not diff.has_changed(abc)
abc.ABCMeta.zzz = 1
assert diff.has_changed(abc)
changed = diff.whats_changed(abc)
assert list(changed[0].keys()) == ["ABCMeta"]
assert not changed[1]
'''
import Queue
diff.memorise(Queue, force=True)
assert not diff.has_changed(Queue)
Queue.Queue.zzz = 1
assert diff.has_changed(Queue)
changed = diff.whats_changed(Queue)
assert list(changed[0].keys()) == ["Queue"]
assert not changed[1]
import math
diff.memorise(math, force=True)
assert not diff.has_changed(math)
math.zzz = 1
assert diff.has_changed(math)
changed = diff.whats_changed(math)
assert list(changed[0].keys()) == ["zzz"]
assert not changed[1]
'''
a = A()
b = A()
c = A()
a.a = b
b.a = c
diff.memorise(a)
assert not diff.has_changed(a)
c.a = 1
assert diff.has_changed(a)
diff.memorise(c, force=True)
assert not diff.has_changed(a)
del c.a
assert diff.has_changed(a)
changed = diff.whats_changed(a)
assert list(changed[0].keys()) == ["a"]
assert not changed[1]
if __name__ == '__main__':
test_diff()