def test_sample_stochasticity(self):
size = 5
action_space_size = 3
observation_space_size = 1
b = Buffer(size, action_space_size, observation_space_size)
for i in range(size):
b.add(
np.ones(observation_space_size) * i,
np.ones(action_space_size) * i, i,
np.ones(observation_space_size) * i, False)
counters = np.zeros((size, 1))
sample_size = 2
sample_count = 10000
for i in range(sample_count):
s0, a, r, s1, d = b.sample(sample_size)
self.assert_np_array_equal(d, np.zeros((sample_size, 1)))
self.assert_np_array_equal(
np.ones((sample_size, observation_space_size)) * r, s0)
self.assert_np_array_equal(
np.ones((sample_size, observation_space_size)) * r, s1)
self.assert_np_array_equal(
np.ones((sample_size, action_space_size)) * r, a)
indexes = r.reshape((sample_size, )).astype(int)
# repeating indeces make it harder to use vectorized way
for j in indexes:
counters[j] += 1
counters_sum = counters.sum()
self.assertEqual(counters_sum, sample_count * sample_size)
# avg number of times each index should have appeared in a random draw
num_per_bin = counters_sum / size
# check if within margins
margin = 0.1
for i in range(sample_size):
self.assertTrue(counters[i] < num_per_bin * (1. + margin))
self.assertTrue(counters[i] > num_per_bin * (1 - margin))
def test_sample(self):
size = 2
action_space_size = 3
observation_space_size = 1
b = Buffer(size, action_space_size, observation_space_size)
b.add(np.ones(observation_space_size), np.ones(action_space_size), 0,
np.ones(observation_space_size), False)
b.add(np.ones(observation_space_size), np.ones(action_space_size), 0,
np.ones(observation_space_size), False)
s0, a, r, s1, d = b.sample(2)
self.assertEqual(s0.shape, (2, observation_space_size))
self.assertEqual(s1.shape, (2, observation_space_size))
self.assertEqual(a.shape, (2, action_space_size))
self.assertEqual(r.shape, (2, 1))
self.assertEqual(d.shape, (2, 1))
self.assertEqual(d.dtype, np.float32)
def test_can_sample(self):
# env = gym.make('MountainCarContinuous-v0')
size = 2
action_space_size = 3
observation_space_size = 1
b = Buffer(size, action_space_size, observation_space_size)
self.assertFalse(b.can_sample(1))
self.assertFalse(b.can_sample(2))
b.add(np.ones(observation_space_size), np.ones(action_space_size), 0,
np.ones(observation_space_size), False)
self.assertTrue(b.can_sample(1))
self.assertFalse(b.can_sample(2))
b.add(np.ones(observation_space_size), np.ones(action_space_size), 0,
np.ones(observation_space_size), False)
self.assertTrue(b.can_sample(1))
self.assertTrue(b.can_sample(2))
b.add(np.ones(observation_space_size), np.ones(action_space_size), 0,
np.ones(observation_space_size), False)
self.assertFalse(b.can_sample(3))
def test_buffer_done_conversion(self):
size = 5
action_space_size = 3
observation_space_size = 1
b = Buffer(size, action_space_size, observation_space_size)
for i in range(size):
b.add(np.ones(observation_space_size), np.ones(action_space_size),
1, np.ones(observation_space_size), False)
_, _, _, _, d = b.sample(size)
self.assertEqual(np.sum(d), 0)
for i in range(size):
b.add(np.ones(observation_space_size), np.ones(action_space_size),
1, np.ones(observation_space_size), True)
_, _, _, _, d = b.sample(size)
self.assertEqual(np.sum(d), size)
def test_buffer_overriding(self):
size = 5
action_space_size = 3
observation_space_size = 1
b = Buffer(size, action_space_size, observation_space_size)
for i in range(size):
b.add(np.ones(observation_space_size), np.ones(action_space_size),
1, np.ones(observation_space_size), False)
_, _, r, _, _ = b.sample(size)
self.assertEqual(np.sum(r), size)
for i in range(size):
b.add(
np.ones(observation_space_size) * 2,
np.ones(action_space_size) * 2, 2,
np.ones(observation_space_size) * 2, False)
_, _, r, _, _ = b.sample(size)
self.assertEqual(np.sum(r), size * 2)