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https://github.com/Farama-Foundation/Gymnasium.git
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ab3e02db83
* Initial commit * Remove unnecessary `warnings.simplefilters` * Fix tests for new step API * Fix testing Co-authored-by: Markus28 <montcyril@gmail.com>
126 lines
4.1 KiB
Python
126 lines
4.1 KiB
Python
"""Tests for the pixel observation wrapper."""
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from typing import Optional
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import numpy as np
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import pytest
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import gym
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from gym import spaces
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from gym.wrappers.pixel_observation import STATE_KEY, PixelObservationWrapper
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class FakeEnvironment(gym.Env):
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def __init__(self, render_mode="single_rgb_array"):
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self.action_space = spaces.Box(shape=(1,), low=-1, high=1, dtype=np.float32)
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self.render_mode = render_mode
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def render(self, mode="human", width=32, height=32):
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image_shape = (height, width, 3)
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return np.zeros(image_shape, dtype=np.uint8)
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def reset(self, *, seed: Optional[int] = None, options: Optional[dict] = None):
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super().reset(seed=seed)
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observation = self.observation_space.sample()
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return observation, {}
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def step(self, action):
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del action
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observation = self.observation_space.sample()
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reward, terminal, info = 0.0, False, {}
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return observation, reward, terminal, info
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class FakeArrayObservationEnvironment(FakeEnvironment):
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def __init__(self, *args, **kwargs):
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self.observation_space = spaces.Box(
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shape=(2,), low=-1, high=1, dtype=np.float32
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)
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super().__init__(*args, **kwargs)
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class FakeDictObservationEnvironment(FakeEnvironment):
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def __init__(self, *args, **kwargs):
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self.observation_space = spaces.Dict(
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{
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"state": spaces.Box(shape=(2,), low=-1, high=1, dtype=np.float32),
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}
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)
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super().__init__(*args, **kwargs)
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@pytest.mark.parametrize("pixels_only", (True, False))
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def test_dict_observation(pixels_only):
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pixel_key = "rgb"
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env = FakeDictObservationEnvironment()
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# Make sure we are testing the right environment for the test.
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observation_space = env.observation_space
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assert isinstance(observation_space, spaces.Dict)
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width, height = (320, 240)
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# The wrapper should only add one observation.
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wrapped_env = PixelObservationWrapper(
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env,
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pixel_keys=(pixel_key,),
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pixels_only=pixels_only,
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render_kwargs={pixel_key: {"width": width, "height": height}},
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)
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assert isinstance(wrapped_env.observation_space, spaces.Dict)
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if pixels_only:
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assert len(wrapped_env.observation_space.spaces) == 1
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assert list(wrapped_env.observation_space.spaces.keys()) == [pixel_key]
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else:
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assert (
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len(wrapped_env.observation_space.spaces)
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== len(observation_space.spaces) + 1
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)
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expected_keys = list(observation_space.spaces.keys()) + [pixel_key]
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assert list(wrapped_env.observation_space.spaces.keys()) == expected_keys
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# Check that the added space item is consistent with the added observation.
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observation, info = wrapped_env.reset()
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rgb_observation = observation[pixel_key]
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assert isinstance(info, dict)
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assert rgb_observation.shape == (height, width, 3)
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assert rgb_observation.dtype == np.uint8
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@pytest.mark.parametrize("pixels_only", (True, False))
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def test_single_array_observation(pixels_only):
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pixel_key = "depth"
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env = FakeArrayObservationEnvironment()
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observation_space = env.observation_space
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assert isinstance(observation_space, spaces.Box)
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wrapped_env = PixelObservationWrapper(
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env, pixel_keys=(pixel_key,), pixels_only=pixels_only
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)
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wrapped_env.observation_space = wrapped_env.observation_space
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assert isinstance(wrapped_env.observation_space, spaces.Dict)
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if pixels_only:
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assert len(wrapped_env.observation_space.spaces) == 1
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assert list(wrapped_env.observation_space.spaces.keys()) == [pixel_key]
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else:
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assert len(wrapped_env.observation_space.spaces) == 2
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assert list(wrapped_env.observation_space.spaces.keys()) == [
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STATE_KEY,
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pixel_key,
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]
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observation, info = wrapped_env.reset()
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depth_observation = observation[pixel_key]
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assert isinstance(info, dict)
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assert depth_observation.shape == (32, 32, 3)
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assert depth_observation.dtype == np.uint8
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if not pixels_only:
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assert isinstance(observation[STATE_KEY], np.ndarray)
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