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import pytest
import numpy as np
from numpy.testing import assert_, assert_almost_equal
from astroML.time_series import generate_power_law, generate_damped_RW
@pytest.mark.parametrize("N", [10, 11])
@pytest.mark.parametrize("generate_complex", [True, False])
def test_generate_args(N, generate_complex):
dt = 0.1
beta = 2
x = generate_power_law(N, dt, beta, generate_complex)
assert_(bool(generate_complex) == np.iscomplexobj(x))
assert_(len(x) == N)
def test_generate_RW():
t = np.arange(0., 1E2)
tau = 300
z = 2.0
rng = np.random.RandomState(0)
xmean = rng.rand(1)*200 - 100
N = len(t)
y = generate_damped_RW(t, tau=tau, z=z, xmean=xmean, random_state=rng)
assert_(len(generate_damped_RW(t)) == N)
assert_almost_equal(np.mean(y), xmean, 0)
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