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unit_tests.py
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175 lines (136 loc) · 5.39 KB
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#!/usr/bin/env python
'''
Created on August 29, 2014
@author: Jonathan Scholz <jonathan.scholz@gmail.com>
'''
import unittest
import math
from agents import QFunction, QLearningAgent, SARSAAgent
from domains import CliffMDP
class TestQFunction(unittest.TestCase):
'''
Tests the core Q-function used in both RL agents.
'''
def setUp(self):
pass
def test_set_and_get_item(self):
Q = QFunction()
Q.set((0, 0), 1, 0.1)
self.assertEqual(Q[(0, 0), 1], 0.1)
Q.set((0, 0), 2, 0.2)
self.assertEqual(Q[(0, 0), 2], 0.2)
Q.set((0, 0), 3, 0.3)
self.assertEqual(Q[(0, 0), 3], 0.3)
def test_slice_synchronization(self):
Q = QFunction()
Q[(0, 0), 3] = 0.3
Q[(0, 0), 1] = 0.1
Q[(0, 0), 2] = 0.2
Q[(0, 1), 1] = -0.1
Q[(0, 1), 2] = -0.2
Q[(0, 1), 3] = -0.3
self.assertEqual(Q.slice((0, 0)), {1: 0.1, 2: 0.2, 3: 0.3})
self.assertEqual(Q.slice((0, 1)), {1: -0.1, 2: -0.2, 3: -0.3})
def test_removal_operators(self):
Q = QFunction()
Q[(0, 0), 3] = 0.3
Q[(0, 0), 1] = 0.1
Q[(0, 0), 2] = 0.2
Q.remove((0, 0), 1)
self.assertEqual(Q.slice((0, 0)), {2: 0.2, 3: 0.3})
del Q[(0, 0), 2]
self.assertEqual(Q.slice((0, 0)), {3: 0.3})
def test_state_set(self):
Q = QFunction()
Q[(0, 0), 3] = 0.3
Q[(0, 0), 1] = 0.1
Q[(0, 1), 1] = -0.1
Q[(0, 1), 2] = -0.2
self.assertEqual(Q.states, set([(0, 1), (0, 0)]))
def test_slice_iteration(self):
Q = QFunction()
Q[0, 1] = 0.1
Q[0, 2] = 0.2
Q[1, 1] = 0.1
Q[1, 2] = 0.2
for state in Q.states:
self.assertEqual(Q.slice(state), {1: 0.1, 2: 0.2})
class TestQLearningAgent(unittest.TestCase):
'''
Tests the Q-learning agent's action methods and backup function.
'''
def setUp(self):
self.agent = QLearningAgent(legal_actions=(0, 1),
gamma=0.9, alpha=0.25, epsilon=0.9)
self.agent.Q[0, 1] = 1.0
self.agent.Q[0, 2] = 0.5
self.agent.Q[1, 1] = -2.0
self.agent.Q[1, 2] = -1.0
def test_get_greedy_action(self):
self.assertEqual(self.agent._get_greedy_action(0), 1)
self.assertEqual(self.agent._get_greedy_action(1), 2)
def test_get_random_action(self):
self.assertIn(self.agent._get_random_action(),
self.agent.legal_actions)
def test_td_error(self):
self.assertTrue(abs(self.agent._td_error(0, 0, 1, 1.9) - 1.0)\
< 1e-10)
self.assertTrue(abs(self.agent._td_error(0, 0, 1, -0.5) + 1.4)\
< 1e-10)
class TestSARSAAgent(unittest.TestCase):
'''
Tests the SARSA agent's action methods and backup function.
'''
def setUp(self):
self.agent = SARSAAgent(legal_actions=(0, 1),
gamma=0.9, alpha=0.25, epsilon=0.9)
self.agent.Q[0, 1] = 1.0
self.agent.Q[0, 2] = 0.5
self.agent.Q[1, 1] = -2.0
self.agent.Q[1, 2] = -1.0
def test_get_greedy_action(self):
self.assertEqual(self.agent._get_greedy_action(0), 1)
self.assertEqual(self.agent._get_greedy_action(1), 2)
def test_get_random_action(self):
self.assertIn(self.agent._get_random_action(),
self.agent.legal_actions)
def test_td_error(self):
self.assertTrue(self.agent._td_error(0, 0, 1, 1.9, 2) - 1.0 < 1e-10)
self.assertTrue(self.agent._td_error(0, 0, 1, 1.9, -2) - 1.9 < 1e-10)
class TestCliffMDP(unittest.TestCase):
'''
Tests the main MDP methods of the Cliff Domain.
'''
def setUp(self):
self.mdp = CliffMDP(width=5, height=5)
def test_get_start_state(self):
self.assertEqual(self.mdp.get_start_state(), (0, 4))
def test_get_reward(self):
self.assertEqual(self.mdp.get_reward((0, 0)), -1.)
self.assertEqual(self.mdp.get_reward((0, 4)), -1.)
self.assertEqual(self.mdp.get_reward((1, 4)), -100.)
self.assertEqual(self.mdp.get_reward((3, 4)), -100.)
self.assertEqual(self.mdp.get_reward((4, 4)), -1.)
self.assertEqual(self.mdp.get_reward((4, 0)), -1.)
def test_get_transition(self):
# test corners
self.assertEqual(self.mdp.get_transition((0, 0), 0), (0, 0))
self.assertEqual(self.mdp.get_transition((0, 0), 1), (0, 0))
self.assertEqual(self.mdp.get_transition((0, 4), 1), (0, 4))
self.assertEqual(self.mdp.get_transition((0, 4), 2), (0, 4))
self.assertEqual(self.mdp.get_transition((4, 4), 2), (4, 4))
self.assertEqual(self.mdp.get_transition((4, 4), 3), (4, 4))
self.assertEqual(self.mdp.get_transition((4, 0), 0), (4, 0))
self.assertEqual(self.mdp.get_transition((4, 0), 3), (4, 0))
# test inside dynamics
self.assertEqual(self.mdp.get_transition((2, 2), 0), (2, 1))
self.assertEqual(self.mdp.get_transition((2, 2), 1), (1, 2))
self.assertEqual(self.mdp.get_transition((2, 2), 2), (2, 3))
self.assertEqual(self.mdp.get_transition((2, 2), 3), (3, 2))
def test_is_terminal(self):
self.assertFalse(self.mdp.is_terminal((0, 4)))
self.assertTrue(self.mdp.is_terminal((1, 4)))
self.assertTrue(self.mdp.is_terminal((4, 4)))
self.assertFalse(self.mdp.is_terminal((4, 3)))
if __name__ == '__main__':
unittest.main()