def test_is_lexsorted(self):
levels = [[0, 1], [0, 1, 2]]
index = MultiIndex(
levels=levels, codes=[[0, 0, 0, 1, 1, 1], [0, 1, 2, 0, 1, 2]]
)
assert index._is_lexsorted()
index = MultiIndex(
levels=levels, codes=[[0, 0, 0, 1, 1, 1], [0, 1, 2, 0, 2, 1]]
)
assert not index._is_lexsorted()
index = MultiIndex(
levels=levels, codes=[[0, 0, 1, 0, 1, 1], [0, 1, 0, 2, 2, 1]]
)
assert not index._is_lexsorted()
assert index._lexsort_depth == 0
