def test_random_termial_error(self, n) -> None:
"""Test error out when random termial is used wih negative or zero value."""
with pytest.raises(ValueError):
State._random_termial(n)
def test_random_termial(self, n) -> None:
"""Compute random termial function value."""
x = State._random_termial(n)
assert 0 <= x < n