def test_set_modified():
test_obj = LRUCache(1)
modified_time = 42
before_modification = time.time()
test_obj.write("some_key", 101)
assert test_obj.get_modified("some_key") < time.time()
assert test_obj.get_modified("some_key") > before_modification
test_obj.set_modified("some_key", modified_time)
assert test_obj.get_modified("some_key") == modified_time
