def test_various():
a = create_series()
assert a.is_null().sum() == 0
assert a.name == "a"
a.rename("b")
assert a.name == "b"
assert a.len() == 2
assert len(a) == 2
b = a.slice(1, 1)
assert b.len() == 1
assert b.series_equal(Series("", [2]))
a.append(b)
assert a.series_equal(Series("", [1, 2, 2]))
a = Series("a", range(20))
assert a.head(5).len() == 5
assert a.tail(5).len() == 5
assert a.head(5) != a.tail(5)
a = Series("a", [2, 1, 4])
a.sort(in_place=True)
assert a.series_equal(Series("", [1, 2, 4]))
a = Series("a", [2, 1, 1, 4, 4, 4])
assert a.arg_unique().to_list() == [0, 1, 3]
assert a.take([2, 3]).series_equal(Series("", [1, 4]))
assert a.is_numeric()
a = Series("bool", [True, False])
assert not a.is_numeric()
def test_sort():
a = Series("a", [2, 1, 3])
assert a.sort().to_list() == [1, 2, 3]
assert a.sort(reverse=True) == [3, 2, 1]
