def test_merge_sets_with_remove_in_second_set_after_add_in_first():
first = LWWElementSet()
second = LWWElementSet()
first.add('one', 1)
first.add('one', 2)
second.remove('one', 3)
merged = first.merge(second)
assert not merged.contains('one')
def test_merge_sets():
first = LWWElementSet()
second = LWWElementSet()
first.add('one', 1)
second.add('two', 2)
merged = first.merge(second)
assert merged.contains('one')
assert merged.contains('two')