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test_smbo.py
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test_smbo.py
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import shutil
import time
import unittest
from unittest import mock
import numpy as np
from ConfigSpace.hyperparameters import UniformFloatHyperparameter
import smac.facade.smac_ac_facade
from smac.callbacks import IncorporateRunResultCallback
from smac.configspace import ConfigurationSpace
from smac.epm.random_forest.rf_with_instances import RandomForestWithInstances
from smac.facade.smac_ac_facade import SMAC4AC
from smac.facade.smac_hpo_facade import SMAC4HPO
from smac.intensification.abstract_racer import RunInfoIntent
from smac.optimizer.acquisition import EI, LogEI
from smac.runhistory.runhistory import RunInfo, RunValue
from smac.runhistory.runhistory2epm import RunHistory2EPM4Cost, RunHistory2EPM4LogCost
from smac.scenario.scenario import Scenario
from smac.tae import FirstRunCrashedException, StatusType
from smac.tae.execute_func import ExecuteTAFuncArray
from smac.utils import test_helpers
from smac.utils.io.traj_logging import TrajLogger
from smac.utils.validate import Validator
__copyright__ = "Copyright 2021, AutoML.org Freiburg-Hannover"
__license__ = "3-clause BSD"
def target(x, seed, instance):
"""A target function for dummy testing of TA
perform x^2 for easy result calculations in checks.
"""
# Return x[i] (with brackets) so we pass the value, not the
# np array element
return x[0] ** 2, {"key": seed, "instance": instance}
class ConfigurationMock(object):
def __init__(self, value=None):
self.value = value
def get_array(self):
return [self.value]
class TestSMBO(unittest.TestCase):
def setUp(self):
self.scenario = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo",
"runcount-limit": 5,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs = []
self.output_dirs.append(self.scenario.output_dir)
def tearDown(self):
for output_dir in self.output_dirs:
if output_dir:
shutil.rmtree(output_dir, ignore_errors=True)
def branin(self, x):
y = (x[:, 1] - (5.1 / (4 * np.pi**2)) * x[:, 0] ** 2 + 5 * x[:, 0] / np.pi - 6) ** 2
y += 10 * (1 - 1 / (8 * np.pi)) * np.cos(x[:, 0]) + 10
return y[:, np.newaxis]
def test_init_only_scenario_runtime(self):
self.scenario.run_obj = "runtime"
self.scenario.cutoff = 300
smbo = SMAC4AC(self.scenario).solver
self.assertIsInstance(smbo.epm_chooser.model, RandomForestWithInstances)
self.assertIsInstance(smbo.epm_chooser.rh2EPM, RunHistory2EPM4LogCost)
self.assertIsInstance(smbo.epm_chooser.acquisition_func, LogEI)
def test_init_only_scenario_quality(self):
smbo = SMAC4AC(self.scenario).solver
self.assertIsInstance(smbo.epm_chooser.model, RandomForestWithInstances)
self.assertIsInstance(smbo.epm_chooser.rh2EPM, RunHistory2EPM4Cost)
self.assertIsInstance(smbo.epm_chooser.acquisition_func, EI)
def test_rng(self):
smbo = SMAC4AC(self.scenario, rng=None).solver
self.assertIsInstance(smbo.rng, np.random.RandomState)
self.assertIsInstance(smbo.num_run, int)
smbo = SMAC4AC(self.scenario, rng=1).solver
rng = np.random.RandomState(1)
self.assertEqual(smbo.num_run, 1)
self.assertIsInstance(smbo.rng, np.random.RandomState)
smbo = SMAC4AC(self.scenario, rng=rng).solver
self.assertIsInstance(smbo.num_run, int)
self.assertIs(smbo.rng, rng)
# ML: I don't understand the following line and it throws an error
self.assertRaisesRegex(
TypeError,
"Argument rng accepts only arguments of type None, int or np.random.RandomState, you provided "
"<class 'str'>.",
SMAC4AC,
self.scenario,
rng="BLA",
)
@mock.patch("smac.tae.execute_func.ExecuteTAFuncDict._call_ta")
def test_abort_on_initial_design(self, patch):
def target(x):
return 5
# should raise an error if abort_on_first_run_crash is True
patch.side_effect = FirstRunCrashedException()
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-abort",
"abort_on_first_run_crash": True,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
smbo = SMAC4AC(scen, tae_runner=target, rng=1).solver
with self.assertRaisesRegex(FirstRunCrashedException, "in _mock_call"):
smbo.run()
# should not raise an error if abort_on_first_run_crash is False
patch.side_effect = FirstRunCrashedException()
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-abort",
"abort_on_first_run_crash": False,
"wallclock-limit": 1,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
smbo = SMAC4AC(scen, tae_runner=target, rng=1).solver
try:
smbo.start()
smbo.run()
except FirstRunCrashedException:
self.fail("Raises FirstRunCrashedException unexpectedly!")
@mock.patch("smac.tae.execute_func.AbstractTAFunc.run")
def test_abort_on_runner(self, patch):
def target(x):
return 5
# should raise an error if abort_on_first_run_crash is True
patch.side_effect = FirstRunCrashedException()
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-abort",
"abort_on_first_run_crash": True,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
smbo = SMAC4AC(scen, tae_runner=target, rng=1).solver
self.assertRaises(FirstRunCrashedException, smbo.run)
# should not raise an error if abort_on_first_run_crash is False
patch.side_effect = FirstRunCrashedException()
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-abort",
"abort_on_first_run_crash": False,
"wallclock-limit": 1,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
smbo = SMAC4AC(scen, tae_runner=target, rng=1).solver
try:
smbo.start()
smbo.run()
except FirstRunCrashedException:
self.fail("Raises FirstRunCrashedException unexpectedly!")
@mock.patch("smac.tae.execute_func.AbstractTAFunc.run")
def test_stop_smbo(self, patch):
def target(x):
return 5
# should raise an error if abort_on_first_run_crash is True
patch.return_value = StatusType.STOP, 0.5, 0.5, {}
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-abort",
"abort_on_first_run_crash": True,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
smbo = SMAC4AC(scen, tae_runner=target, rng=1)
self.assertFalse(smbo.solver._stop)
smbo.optimize()
self.assertEqual(len(smbo.runhistory.data), 1)
# After an optimization, we expect no running instances.
self.assertEqual(list(smbo.runhistory.data.values())[0].status, StatusType.STOP)
self.assertTrue(smbo.solver._stop)
def test_intensification_percentage(self):
def target(x):
return 5
def get_smbo(intensification_perc):
"""Return SMBO with intensification_percentage."""
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-intensification",
"intensification_percentage": intensification_perc,
"deterministic": False,
"limit_resources": True,
}
)
self.output_dirs.append(scen.output_dir)
return SMAC4AC(scen, tae_runner=target, rng=1).solver
# Test for valid values
smbo = get_smbo(0.3)
self.assertAlmostEqual(3.0, smbo._get_timebound_for_intensification(7.0, update=False))
smbo = get_smbo(0.5)
self.assertAlmostEqual(0.03, smbo._get_timebound_for_intensification(0.03, update=False))
smbo = get_smbo(0.7)
self.assertAlmostEqual(1.4, smbo._get_timebound_for_intensification(0.6, update=False))
# Test for invalid <= 0
smbo = get_smbo(0)
self.assertRaises(ValueError, smbo.run)
smbo = get_smbo(-0.2)
self.assertRaises(ValueError, smbo.run)
# Test for invalid >= 1
smbo = get_smbo(1)
self.assertRaises(ValueError, smbo.run)
smbo = get_smbo(1.2)
self.assertRaises(ValueError, smbo.run)
def test_update_intensification_percentage(self):
"""
This test checks the intensification time bound is updated in subsequent iterations as long as
num_runs of the intensifier is not reset to zero.
"""
def target(x):
return 5
scen = Scenario(
{
"cs": test_helpers.get_branin_config_space(),
"run_obj": "quality",
"output_dir": "data-test_smbo-intensification",
"save_instantly": False,
"deterministic": False,
"limit_resources": True,
},
)
self.output_dirs.append(scen.output_dir)
solver = SMAC4AC(scen, tae_runner=target, rng=1).solver
solver.stats.is_budget_exhausted = unittest.mock.Mock()
solver.stats.is_budget_exhausted.side_effect = tuple(([False] * 10) + [True] * 8)
solver._get_timebound_for_intensification = unittest.mock.Mock(wraps=solver._get_timebound_for_intensification)
class SideEffect:
def __init__(self, intensifier, get_next_run):
self.intensifier = intensifier
self.get_next_run = get_next_run
self.counter = 0
def __call__(self, *args, **kwargs):
self.counter += 1
if self.counter % 4 == 0:
self.intensifier.num_run = 0
return self.get_next_run(*args, **kwargs)
solver.intensifier.get_next_run = unittest.mock.Mock(
side_effect=SideEffect(solver.intensifier, solver.intensifier.get_next_run)
)
solver.run()
get_timebound_mock = solver._get_timebound_for_intensification
self.assertEqual(get_timebound_mock.call_count, 6)
self.assertFalse(get_timebound_mock.call_args_list[0][1]["update"])
self.assertFalse(get_timebound_mock.call_args_list[1][1]["update"])
self.assertTrue(get_timebound_mock.call_args_list[2][1]["update"])
self.assertFalse(get_timebound_mock.call_args_list[3][1]["update"])
self.assertTrue(get_timebound_mock.call_args_list[4][1]["update"])
self.assertTrue(get_timebound_mock.call_args_list[5][1]["update"])
self.assertGreater(
get_timebound_mock.call_args_list[2][0][0],
get_timebound_mock.call_args_list[1][0][0],
)
self.assertLess(
get_timebound_mock.call_args_list[3][0][0],
get_timebound_mock.call_args_list[2][0][0],
)
self.assertGreater(
get_timebound_mock.call_args_list[4][0][0],
get_timebound_mock.call_args_list[3][0][0],
)
self.assertGreater(
get_timebound_mock.call_args_list[5][0][0],
get_timebound_mock.call_args_list[4][0][0],
)
def test_validation(self):
with mock.patch.object(TrajLogger, "read_traj_aclib_format", return_value=None):
self.scenario.output_dir = "test"
smac = SMAC4AC(self.scenario)
self.output_dirs.append(smac.output_dir)
smbo = smac.solver
with mock.patch.object(Validator, "validate", return_value=None) as validation_mock:
smbo.validate(
config_mode="inc",
instance_mode="train+test",
repetitions=1,
use_epm=False,
n_jobs=-1,
backend="threading",
)
self.assertTrue(validation_mock.called)
with mock.patch.object(Validator, "validate_epm", return_value=None) as epm_validation_mock:
smbo.validate(
config_mode="inc",
instance_mode="train+test",
repetitions=1,
use_epm=True,
n_jobs=-1,
backend="threading",
)
self.assertTrue(epm_validation_mock.called)
def test_no_initial_design(self):
self.scenario.output_dir = "test"
smac = SMAC4AC(self.scenario)
self.output_dirs.append(smac.output_dir)
smbo = smac.solver
# SMBO should have the default configuration as the 1st config if no initial design is given
smbo.start()
self.assertEqual(smbo.initial_design_configs[0], smbo.scenario.cs.get_default_configuration())
def test_ta_integration_to_smbo(self):
"""
In SMBO. 3 objects need to actively comunicate:
-> stats
-> epm
-> runhistory
This method makes sure that executed jobs are properly registered
in the above objects
It uses n_workers to test parallel and serial implementations!!
"""
for n_workers in range(1, 2):
# We create a controlled setting, in which we optimize x^2
# This will allow us to make sure every component act as expected
# FIRST: config space
cs = ConfigurationSpace()
cs.add_hyperparameter(UniformFloatHyperparameter("x", -10.0, 10.0))
smac = SMAC4HPO(
scenario=Scenario(
{
"n_workers": n_workers,
"cs": cs,
"runcount_limit": 5,
"run_obj": "quality",
"deterministic": True,
"limit_resources": True,
"initial_incumbent": "DEFAULT",
"output_dir": "data-test_smbo",
}
),
tae_runner=ExecuteTAFuncArray,
tae_runner_kwargs={"ta": target},
)
# Register output dir for deletion
self.output_dirs.append(smac.output_dir)
smbo = smac.solver
# SECOND: Intensifier that tracks configs
all_configs = []
def mock_get_next_run(**kwargs):
config = cs.sample_configuration()
all_configs.append(config)
return (
RunInfoIntent.RUN,
RunInfo(
config=config,
instance=time.time() % 10,
instance_specific={},
seed=0,
cutoff=None,
capped=False,
budget=0.0,
),
)
intensifier = unittest.mock.Mock()
intensifier.num_run = 0
intensifier.process_results.return_value = (0.0, 0.0)
intensifier.get_next_run = mock_get_next_run
smac.solver.intensifier = intensifier
# THIRD: Run in this controlled setting
smbo.run()
# FOURTH: Checks
# Make sure all configs where launched
self.assertEqual(len(all_configs), 5)
# Run history
for k, v in smbo.runhistory.data.items():
# All configuration should be successful
self.assertEqual(v.status, StatusType.SUCCESS)
# The value should be the square version of the config
# The runhistory has config_ids = {config: int}
# The k here is {config_id: int}. We search for the actual config
# by inverse searching this runhistory.config dict
config = list(smbo.runhistory.config_ids.keys())[
list(smbo.runhistory.config_ids.values()).index(k.config_id)
]
self.assertEqual(v.cost, config.get("x") ** 2)
# No config is lost in the config history
self.assertCountEqual(smbo.runhistory.config_ids.keys(), all_configs)
# Stats!
# We do not exceed the number of target algorithm runs
self.assertEqual(smbo.stats.submitted_ta_runs, len(all_configs))
self.assertEqual(smbo.stats.finished_ta_runs, len(all_configs))
# No config is lost
self.assertEqual(smbo.stats.n_configs, len(all_configs))
# The EPM can access all points. This is something that
# also relies on the runhistory
X, Y, X_config = smbo.epm_chooser._collect_data_to_train_model()
self.assertEqual(X.shape[0], len(all_configs))
@unittest.mock.patch.object(smac.facade.smac_ac_facade.Intensifier, "process_results")
def test_incorporate_run_results_callback(self, process_results_mock):
process_results_mock.return_value = None, None
class TestCallback(IncorporateRunResultCallback):
def __init__(self):
self.num_call = 0
def __call__(self, smbo, run_info, result, time_left) -> None:
self.num_call += 1
self.config = run_info.config
callback = TestCallback()
self.scenario.output_dir = None
smac = SMAC4AC(self.scenario)
smac.register_callback(callback)
self.output_dirs.append(smac.output_dir)
smbo = smac.solver
config = self.scenario.cs.sample_configuration()
run_info = RunInfo(
config=config,
instance=None,
instance_specific=None,
seed=1,
cutoff=None,
capped=False,
budget=0.0,
source_id=0,
)
result = RunValue(1.2345, 2.3456, "status", "starttime", "endtime", "additional_info")
time_left = 10
smbo._incorporate_run_results(run_info=run_info, result=result, time_left=time_left)
self.assertEqual(callback.num_call, 1)
self.assertEqual(callback.config, config)
@unittest.mock.patch.object(smac.facade.smac_ac_facade.Intensifier, "process_results")
def test_incorporate_run_results_callback_stop_loop(self, process_results_mock):
def target(x):
return 5
process_results_mock.return_value = None, None
class TestCallback(IncorporateRunResultCallback):
def __init__(self):
self.num_call = 0
def __call__(self, smbo, run_info, result, time_left) -> None:
self.num_call += 1
if self.num_call > 2:
return False
callback = TestCallback()
self.scenario.output_dir = None
smac = SMAC4AC(self.scenario, tae_runner=target, rng=1)
smac.register_callback(callback)
self.output_dirs.append(smac.output_dir)
smac.optimize()
self.assertEqual(callback.num_call, 3)
if __name__ == "__main__":
unittest.main()