import numpy as np
import pytest

from cymsim import Material, Thermal

STEEL = Material(200e9, 0.3, 7850)
STEEL_LOSSY = Material(200e9, 0.3, 7850, 3e-4, Thermal(12e-6, 460, 50))
BRONZE = Material(110e9, 0.34, 8800, 2e-4, Thermal(18e-6, 370, 40))


@pytest.fixture
def rng():
    return np.random.default_rng(7)