mirror of
https://github.com/Farama-Foundation/Gymnasium.git
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f6742ea808
* Remove AtariEnv in favour of official ALE Python * More robust frame stacking test case * Atari documentation update
94 lines
3.0 KiB
Python
94 lines
3.0 KiB
Python
import numpy as np
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import gym
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from gym.wrappers import AtariPreprocessing
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import pytest
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pytest.importorskip("ale_py")
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@pytest.fixture(scope="module")
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def env_fn():
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return lambda: gym.make("PongNoFrameskip-v4")
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def test_atari_preprocessing_grayscale(env_fn):
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import cv2
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env1 = env_fn()
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env2 = AtariPreprocessing(
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env_fn(), screen_size=84, grayscale_obs=True, frame_skip=1, noop_max=0
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)
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env3 = AtariPreprocessing(
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env_fn(), screen_size=84, grayscale_obs=False, frame_skip=1, noop_max=0
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)
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env4 = AtariPreprocessing(
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env_fn(),
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screen_size=84,
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grayscale_obs=True,
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frame_skip=1,
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noop_max=0,
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grayscale_newaxis=True,
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)
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env1.seed(0)
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env2.seed(0)
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env3.seed(0)
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env4.seed(0)
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obs1 = env1.reset()
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obs2 = env2.reset()
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obs3 = env3.reset()
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obs4 = env4.reset()
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assert env1.observation_space.shape == (210, 160, 3)
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assert env2.observation_space.shape == (84, 84)
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assert env3.observation_space.shape == (84, 84, 3)
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assert env4.observation_space.shape == (84, 84, 1)
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assert obs1.shape == (210, 160, 3)
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assert obs2.shape == (84, 84)
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assert obs3.shape == (84, 84, 3)
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assert obs4.shape == (84, 84, 1)
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assert np.allclose(obs3, cv2.resize(obs1, (84, 84), interpolation=cv2.INTER_AREA))
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obs3_gray = cv2.cvtColor(obs3, cv2.COLOR_RGB2GRAY)
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# the edges of the numbers do not render quite the same in the grayscale, so we ignore them
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assert np.allclose(obs2[10:38], obs3_gray[10:38])
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# the paddle also do not render quite the same
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assert np.allclose(obs2[44:], obs3_gray[44:])
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# now add a channel axis and re-test
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obs3_gray = obs3_gray.reshape(84, 84, 1)
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assert np.allclose(obs4[10:38], obs3_gray[10:38])
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assert np.allclose(obs4[44:], obs3_gray[44:])
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env1.close()
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env2.close()
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env3.close()
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env4.close()
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def test_atari_preprocessing_scale(env_fn):
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# arbitrarily chosen number for stepping into env. and ensuring all observations are in the required range
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max_test_steps = 10
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for grayscale in [True, False]:
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for scaled in [True, False]:
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env = AtariPreprocessing(
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env_fn(),
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screen_size=84,
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grayscale_obs=grayscale,
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scale_obs=scaled,
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frame_skip=1,
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noop_max=0,
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)
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obs = env.reset().flatten()
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done, step_i = False, 0
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max_obs = 1 if scaled else 255
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assert (0 <= obs).all() and (
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obs <= max_obs
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).all(), "Obs. must be in range [0,{}]".format(max_obs)
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while not done or step_i <= max_test_steps:
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obs, _, done, _ = env.step(env.action_space.sample())
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obs = obs.flatten()
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assert (0 <= obs).all() and (
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obs <= max_obs
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).all(), "Obs. must be in range [0,{}]".format(max_obs)
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step_i += 1
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env.close()
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