def test_simple():
assert list(x.lseries()) == [x]
assert list(Integer(1).lseries(x)) == [1]
assert not next((x / (x + y)).lseries(y)).has(O)
assert [t.doit() for t in Derivative(1 + x, x).lseries(x)] == [0, 1]
# issue sympy/sympy#5183
s = (x + 1 / x).lseries()
assert list(s) == [1 / x, x]
def test_simple():
assert list(x.lseries()) == [x]
assert list(Integer(1).lseries(x)) == [1]
assert not next((x / (x + y)).lseries(y)).has(O)
assert [t.doit() for t in Derivative(1 + x, x).lseries(x)] == [0, 1]
def test_simple():
assert [t for t in x.lseries()] == [x]
assert [t for t in S.One.lseries(x)] == [1]
assert not next((x / (x + y)).lseries(y)).has(O)