def test_are_different_and_set_single_null():
"""
Tests that equality check is correctly handled when a single item amongst the two is ``null``.
This was identified as problematic is case when the checked and set item implements ``__eq__`` and expects a
property to exist, which is not the case for the second item being ``null``.
"""
item = ObjectWithEqProperty()
assert _are_different_and_set(item, null) is False
assert _are_different_and_set(null, item) is False
def test_are_different_and_set_both_set():
assert _are_different_and_set(1, 2) is True
assert _are_different_and_set(1, 1) is False
assert _are_different_and_set({"a": 1}, {"a": 2}) is True
assert _are_different_and_set({"a": 1}, {"a": 1}) is False
assert _are_different_and_set({"a": 1, "b": 2}, {"a": 1}) is True
assert _are_different_and_set(ObjectWithEqProperty(), ObjectWithEqProperty()) is False
assert _are_different_and_set(ObjectWithEqProperty("a"), ObjectWithEqProperty("b")) is True
def test_are_different_and_set_similar_str_formats():
assert _are_different_and_set(b"something", u"something") is False
assert _are_different_and_set(u"something", u"something") is False
assert _are_different_and_set(b"something", b"something") is False
assert _are_different_and_set(b"something", u"else") is True
assert _are_different_and_set(u"something", u"else") is True
assert _are_different_and_set(b"something", b"else") is True
def test_are_different_and_set_both_null():
assert _are_different_and_set(null, null) is False