saving dependency work

lib/python3.9/site-packages/dill/tests/test_diff.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python
+#
+# Author: Mike McKerns (mmckerns @caltech and @uqfoundation)
+# Copyright (c) 2008-2016 California Institute of Technology.
+# Copyright (c) 2016-2022 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()