import pytest
from easydict import EasyDict
import numpy as np
from dizoo.bitflip.envs import BitFlipEnv


@pytest.mark.envtest
def test_bitfilp_env():
    n_bits = 10
    env = BitFlipEnv(EasyDict({'n_bits': n_bits}))
    env.seed(314)
    assert env._seed == 314
    obs = env.reset()
    assert obs.shape == (2 * n_bits, )
    for i in range(10):
        # Both ``env.random_action()``, and utilizing ``np.random`` as well as action space,
        # can generate legal random action.
        if i < 5:
            action = np.random.randint(0, n_bits, size=(1, ))
        else:
            action = env.random_action()
        timestep = env.step(action)
        assert timestep.obs.shape == (2 * n_bits, )
        assert timestep.reward.shape == (1, )