dm_env/dm_env/test_utils_test.py at master · google-deepmind/dm_env · GitHub

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# pylint: disable=g-bad-file-header

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# ============================================================================

"""Tests for dm_env.test_utils."""

import itertools

from absl.testing import absltest

import dm_env

from dm_env import specs

from dm_env import test_utils

import numpy as np

REWARD_SPEC = specs.Array(shape=(), dtype=float)

DISCOUNT_SPEC = specs.BoundedArray(shape=(), dtype=float, minimum=0, maximum=1)

OBSERVATION_SPEC = specs.Array(shape=(2, 3), dtype=float)

ACTION_SPEC = specs.BoundedArray(shape=(), dtype=int, minimum=0, maximum=2)

REWARD = REWARD_SPEC.generate_value()

DISCOUNT = DISCOUNT_SPEC.generate_value()

OBSERVATION = OBSERVATION_SPEC.generate_value()

FIRST = dm_env.restart(observation=OBSERVATION)

MID = dm_env.transition(

reward=REWARD, observation=OBSERVATION, discount=DISCOUNT)

LAST = dm_env.truncation(

reward=REWARD, observation=OBSERVATION, discount=DISCOUNT)

class MockEnvironment(dm_env.Environment):

def __init__(self, timesteps):

self._timesteps = timesteps

self._iter_timesteps = itertools.cycle(self._timesteps)

def reset(self):

self._iter_timesteps = itertools.cycle(self._timesteps)

return next(self._iter_timesteps)

def step(self, action):

return next(self._iter_timesteps)

def reward_spec(self):

return REWARD_SPEC

def discount_spec(self):

return DISCOUNT_SPEC

def action_spec(self):

return ACTION_SPEC

def observation_spec(self):

return OBSERVATION_SPEC

def _make_test_case_with_expected_failures(

name,

timestep_sequence,

expected_failures):

class NewTestCase(test_utils.EnvironmentTestMixin, absltest.TestCase):

def make_object_under_test(self):

return MockEnvironment(timestep_sequence)

for method_name, exception_type in expected_failures:

def wrapped_method(

self, method_name=method_name, exception_type=exception_type):

super_method = getattr(super(NewTestCase, self), method_name)

with self.assertRaises(exception_type):

return super_method()

setattr(NewTestCase, method_name, wrapped_method)

NewTestCase.__name__ = name

return NewTestCase

TestValidTimestepSequence = _make_test_case_with_expected_failures(

name='TestValidTimestepSequence',

timestep_sequence=[FIRST, MID, MID, LAST],

expected_failures=[],

)

# Sequences where the ordering of StepTypes is invalid.

TestTwoFirstStepsInARow = _make_test_case_with_expected_failures(

name='TestTwoFirstStepsInARow',

timestep_sequence=[FIRST, FIRST, MID, MID, LAST],

expected_failures=[

('test_longer_action_sequence', AssertionError),

('test_step_after_reset', AssertionError),

('test_step_on_fresh_environment', AssertionError),

)

TestStartsWithMid = _make_test_case_with_expected_failures(

name='TestStartsWithMid',

timestep_sequence=[MID, MID, LAST],

expected_failures=[

('test_longer_action_sequence', AssertionError),

('test_reset', AssertionError),

('test_step_after_reset', AssertionError),

('test_step_on_fresh_environment', AssertionError),

)

TestMidAfterLast = _make_test_case_with_expected_failures(

name='TestMidAfterLast',

timestep_sequence=[FIRST, MID, LAST, MID],

expected_failures=[

('test_longer_action_sequence', AssertionError),

)

TestFirstAfterMid = _make_test_case_with_expected_failures(

name='TestFirstAfterMid',

timestep_sequence=[FIRST, MID, FIRST],

expected_failures=[

('test_longer_action_sequence', AssertionError),

)

# Sequences where one or more TimeSteps have invalid contents.

TestFirstStepHasReward = _make_test_case_with_expected_failures(

name='TestFirstStepHasReward',

timestep_sequence=[

FIRST._replace(reward=1.0), # Should be None.

MID,

LAST,

expected_failures=[

('test_reset', AssertionError),

('test_step_after_reset', AssertionError),

('test_step_on_fresh_environment', AssertionError),

('test_longer_action_sequence', AssertionError),

]

)

TestFirstStepHasDiscount = _make_test_case_with_expected_failures(

name='TestFirstStepHasDiscount',

timestep_sequence=[

FIRST._replace(discount=1.0), # Should be None.

MID,

LAST,

expected_failures=[

('test_reset', AssertionError),

('test_step_after_reset', AssertionError),

('test_step_on_fresh_environment', AssertionError),

('test_longer_action_sequence', AssertionError),

]

)

TestInvalidReward = _make_test_case_with_expected_failures(

name='TestInvalidReward',

timestep_sequence=[

FIRST,

MID._replace(reward=False), # Should be a float.

MID,

LAST,

expected_failures=[

('test_step_after_reset', ValueError),

('test_step_on_fresh_environment', ValueError),

('test_longer_action_sequence', ValueError),

]

)

TestInvalidDiscount = _make_test_case_with_expected_failures(

name='TestInvalidDiscount',

timestep_sequence=[

FIRST,

MID._replace(discount=1.5), # Should be between 0 and 1.

MID,

LAST,

expected_failures=[

('test_step_after_reset', ValueError),

('test_step_on_fresh_environment', ValueError),

('test_longer_action_sequence', ValueError),

]

)

TestInvalidObservation = _make_test_case_with_expected_failures(

name='TestInvalidObservation',

timestep_sequence=[

FIRST,

MID._replace(observation=np.zeros((3, 4))), # Wrong shape.

MID,

LAST,

expected_failures=[

('test_step_after_reset', ValueError),

('test_step_on_fresh_environment', ValueError),

('test_longer_action_sequence', ValueError),

]

)

TestMismatchingObservationStructure = _make_test_case_with_expected_failures(

name='TestInvalidObservation',

timestep_sequence=[

FIRST,

MID._replace(observation=[OBSERVATION]), # Wrong structure.

MID,

LAST,

expected_failures=[

('test_step_after_reset', AssertionError),

('test_step_on_fresh_environment', AssertionError),

('test_longer_action_sequence', AssertionError),

]

)

if __name__ == '__main__':

absltest.main()

dm_env/dm_env/test_utils_test.py at master · google-deepmind/dm_env · GitHub

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