def state(self):
"""Return test state."""
out = AttribDict()
out.path = os.path.join(os.path.dirname(__file__), 'data')
out.path_images = os.path.join(os.path.dirname(__file__), 'images')
out.a = np.sin(np.linspace(0, 10, 101))
out.b = 5 * np.roll(out.a, 5)
out.c = 5 * np.roll(out.a[:81], 5)
return out
