163 lines
5.1 KiB
Python
163 lines
5.1 KiB
Python
#!/usr/bin/env python
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# Copyright (c) 2016 Hewlett Packard Enterprise Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json
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import logging
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import os
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import unittest
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import monasca_analytics.source.markov_chain.prob_checks as pck
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import monasca_analytics.source.markov_chain.state_check as dck
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import monasca_analytics.source.markov_chain.transition as t
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class DummyState(object):
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def __init__(self, state=0):
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self.state = state
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self.dependencies = []
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class MarkovChainTransitionsTest(unittest.TestCase):
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def setup_logging(self):
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current_dir = os.path.dirname(__file__)
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logging_config_file = os.path.join(current_dir,
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"../../resources/logging.json")
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with open(logging_config_file, "rt") as f:
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config = json.load(f)
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logging.config.dictConfig(config)
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def setUp(self):
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self.setup_logging()
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def tearDown(self):
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pass
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def test_first_order_dep_check(self):
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state = DummyState()
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state.dependencies.append(DummyState(1))
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dc = dck.DepCheck(dck.EqCheck(1))
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self.assertTrue(dc(state))
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state = DummyState()
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self.assertFalse(dc(state))
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state = DummyState()
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state.dependencies.append(DummyState(2))
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self.assertFalse(dc(state))
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def test_second_order_dep_check(self):
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state = DummyState()
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state1 = DummyState()
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state.dependencies.append(state1)
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state1.dependencies.append(DummyState(1))
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dc = dck.DepCheck(dck.DepCheck(dck.EqCheck(1)))
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self.assertTrue(dc(state))
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state = DummyState()
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self.assertFalse(dc(state))
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self.assertFalse(dc(state1))
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def test_combiner_and_dep_check(self):
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state = DummyState()
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state1 = DummyState(1)
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state.dependencies.append(state1)
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state1.dependencies.append(DummyState(2))
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dc = dck.AndCheck(c1=dck.DepCheck(dck.EqCheck(1)),
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c2=dck.DepCheck(dck.DepCheck(dck.EqCheck(2))))
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self.assertTrue(dc(state))
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self.assertFalse(dc(state1))
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state1.state = 2
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self.assertFalse(dc(state))
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state1.state = 1
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state1.dependencies[0].state = 1
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self.assertFalse(dc(state))
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state = DummyState()
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self.assertFalse(dc(state))
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def test_combiner_or_dep_check(self):
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state = DummyState()
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state1 = DummyState(1)
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state.dependencies.append(state1)
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state1.dependencies.append(DummyState(2))
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dc = dck.OrCheck(c1=dck.DepCheck(dck.EqCheck(1)),
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c2=dck.DepCheck(dck.DepCheck(dck.EqCheck(2))))
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self.assertTrue(dc(state))
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self.assertFalse(dc(state1))
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state1.dependencies[0].state = 1
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self.assertTrue(dc(state))
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self.assertTrue(dc(state1))
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state1.state = 2
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self.assertFalse(dc(state))
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state = DummyState()
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self.assertFalse(dc(state))
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def test_prob_check(self):
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pc = pck.ProbCheck(0.5)
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i = 0
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while i < 30:
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if pc(0):
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break
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i += 1
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self.assertTrue(i < 30)
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def test_prob_check_interpolate(self):
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pc = pck.ProbCheck({0: 0.0, 1: 0.0, 24: 1.0})
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self.assertFalse(pc(0))
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self.assertFalse(pc(1))
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self.assertTrue(pc(24))
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i = 0
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while i < 30:
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if pc(12):
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break
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i += 1
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self.assertTrue(i < 30)
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def test_transition(self):
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tr = t.Transition(0, 1, pck.ProbCheck(1.0))
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state = DummyState(0)
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self.assertTrue(tr(state, 1))
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self.assertEqual(state.state, 1)
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state = DummyState(2)
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self.assertFalse(tr(state, 1))
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self.assertEqual(state.state, 2)
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def test_transition_with_true_check(self):
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tr = t.Transition(0, 1, pck.NoProbCheck(), dck.TrueCheck())
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state = DummyState(0)
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self.assertFalse(tr(state, 1))
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state1 = DummyState(123456)
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state.dependencies.append(state1)
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self.assertTrue(tr(state, 1))
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self.assertEqual(state.state, 1)
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def test_markov_chain(self):
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tr1 = t.Transition(0, 1, pck.ProbCheck(1.0))
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tr2 = t.Transition(1, 2, pck.ProbCheck(1.0))
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mc = t.MarkovChain([tr1, tr2])
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state1 = DummyState(0)
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state2 = DummyState(1)
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mc.apply_on(state1, 1)
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mc.apply_on(state2, 1)
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self.assertEqual(state1.state, 1)
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self.assertEqual(state2.state, 2)
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mc.apply_on(state1, 1)
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mc.apply_on(state2, 1)
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self.assertEqual(state1.state, 2)
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self.assertEqual(state2.state, 2)
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if __name__ == "__main__":
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unittest.main()
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