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# Copyright 2017 The TensorFlow Agents Authors.
#
# 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 environment wrappers."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import functools
import tensorflow as tf
from agents import tools
class ExternalProcessTest(tf.test.TestCase):
def test_close_no_hang_after_init(self):
constructor = functools.partial(tools.MockEnvironment,
observ_shape=(2, 3),
action_shape=(2,),
min_duration=2,
max_duration=2)
env = tools.wrappers.ExternalProcess(constructor)
env.close()
def test_close_no_hang_after_step(self):
constructor = functools.partial(tools.MockEnvironment,
observ_shape=(2, 3),
action_shape=(2,),
min_duration=5,
max_duration=5)
env = tools.wrappers.ExternalProcess(constructor)
env.reset()
env.step(env.action_space.sample())
env.step(env.action_space.sample())
env.close()
def test_reraise_exception_in_init(self):
constructor = MockEnvironmentCrashInInit
env = tools.wrappers.ExternalProcess(constructor)
with self.assertRaises(Exception):
env.step(env.action_space.sample())
def test_reraise_exception_in_step(self):
constructor = functools.partial(MockEnvironmentCrashInStep, crash_at_step=3)
env = tools.wrappers.ExternalProcess(constructor)
env.reset()
env.step(env.action_space.sample())
env.step(env.action_space.sample())
with self.assertRaises(Exception):
env.step(env.action_space.sample())
class MockEnvironmentCrashInInit(object):
"""Raise an error when instantiated."""
def __init__(self, *unused_args, **unused_kwargs):
raise RuntimeError()
class MockEnvironmentCrashInStep(tools.MockEnvironment):
"""Raise an error after specified number of steps in an episode."""
def __init__(self, crash_at_step):
super(MockEnvironmentCrashInStep, self).__init__(observ_shape=(2, 3),
action_shape=(2,),
min_duration=crash_at_step + 1,
max_duration=crash_at_step + 1)
self._crash_at_step = crash_at_step
def step(self, *args, **kwargs):
transition = super(MockEnvironmentCrashInStep, self).step(*args, **kwargs)
if self.steps[-1] == self._crash_at_step:
raise RuntimeError()
return transition
if __name__ == '__main__':
tf.test.main()
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