def test_output_time(self):
env = OneCharMemory(n=2, num_steps=3, output_time=True)
self.assertEqual(env.observation_space.flat_dim, 3 + 4)
obs = env.reset()
action = np.zeros(3)
time = np.zeros(4)
time[0] = 1
self.assertNpEqual(obs[-4:], time)
next_ob, reward, terminal, _ = env.step(action)
time[0] = 0
time[1] = 1
self.assertNpEqual(next_ob[-4:], time)
next_ob, reward, terminal, _ = env.step(action)
time[1] = 0
time[2] = 1
self.assertNpEqual(next_ob[-4:], time)
next_ob, reward, terminal, _ = env.step(action)
time[2] = 0
time[3] = 1
self.assertNpEqual(next_ob[-4:], time)
self.assertTrue(terminal)
obs = env.reset()
time[3] = 0
time[0] = 1
self.assertNpEqual(obs[-4:], time)
def test_episode_length_is_right(self):
env = OneCharMemory(num_steps=4)
action = env.reset()
for _ in range(3):
_, _, terminal, _ = env.step(action)
self.assertFalse(terminal)
_, _, terminal, _ = env.step(action)
self.assertTrue(terminal)
def test_reward_for_optimal_input_is_correct(self):
env = OneCharMemory(n=3, num_steps=4, reward_for_remembering=.25)
init_obs = env.reset()
action = np.zeros((4, 1))
action[0] = 1
for _ in range(3):
next_ob, reward, terminal, _ = env.step(action)
self.assertAlmostEqual(reward, 0.)
next_ob, reward, terminal, _ = env.step(init_obs)
self.assertAlmostEqual(reward, 0.25)
def test_reward_for_wrong_input_is_correct(self):
env = OneCharMemory(n=3, num_steps=4)
init_obs = env.reset()
action = init_obs
for _ in range(3):
next_ob, reward, terminal, _ = env.step(action)
self.assertTrue(reward < 0)
based_reward = reward
action = np.zeros((4,))
next_ob, reward, terminal, _ = env.step(action)
self.assertTrue(reward < 0)
def test_output_target(self):
env = OneCharMemory(n=2, num_steps=5, output_target_number=True)
self.assertEqual(env.observation_space.flat_dim, 4)
obs = env.reset()
target_number = np.argmax(obs[:3])
action = np.zeros(3)
next_ob, reward, terminal, _ = env.step(action)
expected_obs = np.hstack((obs[:3], [target_number]))
expected_next_obs = np.array([1, 0, 0, target_number])
self.assertNpArraysEqual(obs, expected_obs)
self.assertNpArraysEqual(next_ob, expected_next_obs)
next_ob, reward, terminal, _ = env.step(action)
self.assertNpArraysEqual(next_ob, expected_next_obs)
def test_reward_for_wrong_input_is_correct(self):
env = OneCharMemory(n=3, num_steps=4, reward_for_remembering=10)
init_obs = env.reset()
action = init_obs
for _ in range(3):
next_ob, reward, terminal, _ = env.step(action)
self.assertEqual(reward, 0)
action = np.zeros((4, ))
if init_obs[2]:
action[3] = 1
else:
action[2] = 1
next_ob, reward, terminal, _ = env.step(action)
self.assertEqual(reward, 0)
def test_episode_length_one(self):
env = OneCharMemory(n=3, num_steps=1, reward_for_remembering=0.5)
action = env.reset()
next_ob, reward, terminal, _ = env.step(action)
self.assertTrue(terminal)
self.assertNpArraysEqual(next_ob, np.array([1, 0, 0, 0]))
self.assertAlmostEqual(reward, 0.5)