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import unittest
from .util import MemorySetup, Traversable
class TestMemoryTraversableImplementation(unittest.TestCase):
def test_concrete_methods_are_not_overridden(self):
"""`MemoryTraversable` must not override `Traversable` concrete methods.
This test is not an attempt to enforce a particular `Traversable` protocol;
it merely catches changes in the `Traversable` abstract/concrete methods
that have not been mirrored in the `MemoryTraversable` subclass.
"""
traversable_concrete_methods = {
method
for method, value in Traversable.__dict__.items()
if callable(value) and method not in Traversable.__abstractmethods__
}
memory_traversable_concrete_methods = {
method
for method, value in MemorySetup.MemoryTraversable.__dict__.items()
if callable(value) and not method.startswith("__")
}
overridden_methods = (
memory_traversable_concrete_methods & traversable_concrete_methods
)
assert not overridden_methods
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