def test_crossover(self, cfg):
# given
parent = Classifier(
condition=Condition(
[UBR(1, 1), UBR(1, 1), UBR(1, 1)], cfg),
effect=Effect(
[UBR(1, 1), UBR(1, 1), UBR(1, 1)], cfg),
cfg=cfg)
donor = Classifier(
condition=Condition(
[UBR(2, 2), UBR(2, 2), UBR(2, 2)], cfg),
effect=Effect(
[UBR(2, 2), UBR(2, 2), UBR(2, 2)], cfg),
cfg=cfg)
# when
np.random.seed(12345) # left: 3, right: 6
crossover(parent, donor)
# then
assert parent.condition == \
Condition([UBR(1, 1), UBR(1, 2), UBR(2, 2)], cfg)
assert parent.effect == \
Effect([UBR(1, 1), UBR(1, 2), UBR(2, 2)], cfg)
assert donor.condition == \
Condition([UBR(2, 2), UBR(2, 1), UBR(1, 1)], cfg)
assert donor.effect == \
Effect([UBR(2, 2), UBR(2, 1), UBR(1, 1)], cfg)
def test_should_subsume_effect(self, _effect1, _effect2, _result, cfg):
# given
effect1 = Effect(_effect1, cfg=cfg)
effect2 = Effect(_effect2, cfg=cfg)
# then
assert effect1.subsumes(effect2) == _result
def test_should_get_maximum_fitness(self, cfg):
# given
# anticipate change - low fitness
cl1 = Classifier(effect=Effect([UBR(0, 1), UBR(0, 3)], cfg),
quality=0.3,
reward=1,
cfg=cfg)
# do not anticipate change - high fitness
cl2 = Classifier(effect=Effect([UBR(0, 15), UBR(0, 15)], cfg),
quality=0.5,
reward=1,
cfg=cfg)
# anticipate change - medium fitness
cl3 = Classifier(effect=Effect([UBR(0, 14), UBR(0, 15)], cfg),
quality=0.4,
reward=1,
cfg=cfg)
population = ClassifierList(*[cl1, cl2, cl3])
# when
mf = population.get_maximum_fitness()
# then
assert mf == cl3.fitness
def crossover(parent: Classifier, donor: Classifier):
assert parent.cfg.classifier_length == donor.cfg.classifier_length
# flatten parent and donor perception strings
p_cond_flat = _flatten(parent.condition)
d_cond_flat = _flatten(donor.condition)
p_effect_flat = _flatten(parent.effect)
d_effect_flat = _flatten(donor.effect)
# select crossing points
left, right = sorted(
np.random.choice(range(0,
len(p_cond_flat) + 1), 2, replace=False))
assert left < right
# extract chromosomes
p_cond_chromosome = p_cond_flat[left:right]
d_cond_chromosome = d_cond_flat[left:right]
p_effect_chromosome = p_effect_flat[left:right]
d_effect_chromosome = d_effect_flat[left:right]
# Flip everything
p_cond_flat[left:right] = d_cond_chromosome
d_cond_flat[left:right] = p_cond_chromosome
p_effect_flat[left:right] = d_effect_chromosome
d_effect_flat[left:right] = p_effect_chromosome
# Rebuild proper perception strings
parent.condition = Condition(_unflatten(p_cond_flat), cfg=parent.cfg)
donor.condition = Condition(_unflatten(d_cond_flat), cfg=donor.cfg)
parent.effect = Effect(_unflatten(p_effect_flat), cfg=parent.cfg)
donor.effect = Effect(_unflatten(d_effect_flat), cfg=parent.cfg)
def test_should_specialize(self, _p0, _p1, _effect, is_specializable, cfg):
# given
p0 = Perception(_p0, oktypes=(float, ))
p1 = Perception(_p1, oktypes=(float, ))
effect = Effect(_effect, cfg=cfg)
# then
assert effect.is_specializable(p0, p1) is is_specializable
def test_should_detect_identical_classifier(self, cfg):
cl_1 = Classifier(condition=Condition([UBR(0, 1), UBR(0, 2)], cfg=cfg),
action=1,
effect=Effect([UBR(2, 3), UBR(4, 5)], cfg=cfg),
cfg=cfg)
cl_2 = Classifier(condition=Condition([UBR(0, 1), UBR(0, 2)], cfg=cfg),
action=1,
effect=Effect([UBR(2, 3), UBR(4, 5)], cfg=cfg),
cfg=cfg)
assert cl_1 == cl_2
def test_aggressive_mutation(self, _cond, _effect, cfg):
# given
condition = Condition(_cond, cfg)
effect = Effect(_effect, cfg)
cfg.encoder = RealValueEncoder(16) # more precise encoder
cfg.mutation_noise = 0.5 # strong noise mutation range
mu = 1.0 # mutate every attribute
cl = Classifier(condition=deepcopy(condition),
effect=deepcopy(effect),
cfg=cfg)
# when
mutate(cl, mu)
# then
range_min, range_max = cfg.encoder.range
for idx, (c, e) in enumerate(zip(cl.condition, cl.effect)):
# assert that we have new locus
if condition[idx] != cfg.classifier_wildcard:
assert condition[idx] != c
if effect[idx] != cfg.classifier_wildcard:
assert effect[idx] != e
# assert if condition values are in ranges
assert c.lower_bound >= range_min
assert c.upper_bound <= range_max
# assert if effect values are in ranges
assert e.lower_bound >= range_min
assert e.upper_bound <= range_max
def test_should_create_new_classifier_with_covering(
self, _p0, _p1, _child_cond, _child_effect, cfg):
# given
cfg.cover_noise = 0.0
p0 = Perception(_p0, oktypes=(float, ))
p1 = Perception(_p1, oktypes=(float, ))
action = random.randint(0, cfg.number_of_possible_actions)
time = random.randint(0, 100)
# when
new_cl = cover(p0, action, p1, time, cfg)
# then
assert new_cl is not None
assert new_cl.condition == Condition(_child_cond, cfg)
assert new_cl.action == action
assert new_cl.effect == Effect(_child_effect, cfg)
assert new_cl.q == .5
assert new_cl.r == 0
assert new_cl.ir == 0
assert new_cl.tav == 0
assert new_cl.tga == time
assert new_cl.talp == time
# assert new_cl.num == 1
assert new_cl.exp == 0
def test_should_create_copy(self, cfg):
# given
operation_time = random.randint(0, 100)
condition = Condition(
[self._random_ubr(), self._random_ubr()], cfg=cfg)
action = random.randint(0, 2)
effect = Effect([self._random_ubr(), self._random_ubr()], cfg=cfg)
cl = Classifier(condition,
action,
effect,
quality=random.random(),
reward=random.random(),
intermediate_reward=random.random(),
cfg=cfg)
# when
copied_cl = Classifier.copy_from(cl, operation_time)
# then
assert cl is not copied_cl
assert cl.condition == copied_cl.condition
assert cl.condition is not copied_cl.condition
assert cl.action == copied_cl.action
assert cl.effect == copied_cl.effect
assert cl.effect is not copied_cl.effect
assert copied_cl.is_marked() is False
assert cl.r == copied_cl.r
assert cl.q == copied_cl.q
assert operation_time == copied_cl.tga
assert operation_time == copied_cl.talp
def test_should_create_pass_through_effect(self, cfg):
# when
effect = Effect.pass_through(cfg)
# then
assert len(effect) == cfg.classifier_length
for allele in effect:
assert allele == cfg.classifier_wildcard
def test_should_find_similar(self):
# given
cfg = Configuration(3, 2, encoder=RealValueEncoder(2))
cl1 = Classifier(
condition=Condition([UBR(0, 0), UBR(0, 3), UBR(0, 3)], cfg=cfg),
action=0,
effect=Effect([UBR(0, 3), UBR(0, 3), UBR(0, 3)], cfg=cfg),
cfg=cfg
)
cl2 = Classifier(
condition=Condition([UBR(0, 0), UBR(0, 3), UBR(0, 3)], cfg=cfg),
action=0,
effect=Effect([UBR(0, 3), UBR(0, 3), UBR(0, 3)], cfg=cfg),
cfg=cfg
)
# then
assert cl1 == cl2
def test_should_return_zero_max_fitness(self, cfg):
# given classifiers that does not anticipate change
cl1 = Classifier(effect=Effect([UBR(0, 15), UBR(0, 15)], cfg),
quality=0.5,
reward=1,
cfg=cfg)
cl2 = Classifier(effect=Effect([UBR(0, 15), UBR(0, 15)], cfg),
quality=0.7,
reward=1,
cfg=cfg)
population = ClassifierList(*[cl1, cl2])
# when
mf = population.get_maximum_fitness()
# then
assert mf == 0.0
def test_should_count_specified_unchanging_attributes(
self, _condition, _effect, _sua, cfg):
# given
cl = Classifier(condition=Condition(_condition, cfg),
effect=Effect(_effect, cfg),
cfg=cfg)
# then
assert len(cl.specified_unchanging_attributes) == _sua
def test_should_initialize_without_arguments(self, cfg):
# when
c = Classifier(cfg=cfg)
# then
assert c.condition == Condition.generic(cfg=cfg)
assert c.action is None
assert c.effect == Effect.pass_through(cfg=cfg)
assert c.exp == 1
assert c.talp is None
assert c.tav == 0.0
def test_should_detect_subsumption(self, _e1, _e2, _exp1, _marked,
_reliable, _more_general,
_condition_matching, _result, mocker,
cfg):
# given
cl1 = Classifier(effect=Effect(_e1, cfg), experience=_exp1, cfg=cfg)
cl2 = Classifier(effect=Effect(_e2, cfg), cfg=cfg)
# when
mocker.patch.object(cl1, "is_reliable")
mocker.patch.object(cl1, "is_marked")
mocker.patch.object(cl1, "is_more_general")
mocker.patch.object(cl1.condition, "does_match_condition")
cl1.is_reliable.return_value = _reliable
cl1.is_marked.return_value = _marked
cl1.is_more_general.return_value = _more_general
cl1.condition.does_match_condition.return_value = _condition_matching
# then
assert cl1.does_subsume(cl2) == _result
def test_should_handle_unexpected_case_3(self, cfg):
# given
p0 = Perception([.5, .5], oktypes=(float, ))
p1 = Perception([.5, .8], oktypes=(float, ))
# Second effect attribute is specializable
effect = Effect([UBR(0, 15), UBR(10, 14)], cfg=cfg)
quality = 0.4
time = random.randint(0, 1000)
cl = Classifier(effect=effect, quality=quality, cfg=cfg)
# when
child = unexpected_case(cl, p0, p1, time)
# then
assert cl.q < quality
assert cl.is_marked() is True
assert child is not None
assert child.is_marked() is False
assert child.q == .5
assert child.condition == Condition([UBR(0, 15), UBR(0, 15)], cfg=cfg)
assert child.effect == Effect([UBR(0, 15), UBR(10, 14)], cfg=cfg)
def test_should_generalize_randomly_unchanging_condition_attribute(
self, _condition, _effect, _soa_before, _soa_after, cfg):
# given
condition = Condition(_condition, cfg)
effect = Effect(_effect, cfg)
cl = Classifier(condition=condition, effect=effect, cfg=cfg)
assert len(cl.specified_unchanging_attributes) == _soa_before
# when
cl.generalize_unchanging_condition_attribute()
# then
assert (len(cl.specified_unchanging_attributes)) == _soa_after
def test_should_handle_unexpected_case_1(self, cfg):
# given
p0 = Perception([.5, .5], oktypes=(float, ))
p1 = Perception([.5, .5], oktypes=(float, ))
# Effect is all pass-through. Can be specialized.
effect = Effect([UBR(0, 15), UBR(0, 15)], cfg=cfg)
quality = .4
time = random.randint(0, 1000)
cl = Classifier(effect=effect, quality=quality, cfg=cfg)
# when
child = unexpected_case(cl, p0, p1, time)
# then
assert cl.q < quality
assert cl.is_marked() is True
assert child
assert child.q == .5
assert child.talp == time
# There is no change in perception so the child condition
# and effect should stay the same.
assert child.condition == Condition([UBR(0, 15), UBR(0, 15)], cfg=cfg)
assert child.effect == Effect([UBR(0, 15), UBR(0, 15)], cfg=cfg)
def test_should_handle_unexpected_case_2(self, cfg):
# given
p0 = Perception([.5, .5], oktypes=(float, ))
p1 = Perception([.5, .5], oktypes=(float, ))
# Effect is not specializable
effect = Effect([UBR(0, 15), UBR(2, 4)], cfg=cfg)
quality = random.random()
time = random.randint(0, 1000)
cl = Classifier(effect=effect, quality=quality, cfg=cfg)
# when
child = unexpected_case(cl, p0, p1, time)
# then
assert cl.q < quality
assert cl.is_marked() is True
# We cannot generate child from non specializable parent
assert child is None
def test_disabled_mutation(self, _cond, _effect, cfg):
# given
condition = Condition(_cond, cfg)
effect = Effect(_effect, cfg)
cl = Classifier(condition=deepcopy(condition),
effect=deepcopy(effect),
cfg=cfg)
mu = 0.0
# when
mutate(cl, mu)
# then
for idx, (c, e) in enumerate(zip(cl.condition, cl.effect)):
assert c.lower_bound == condition[idx].lower_bound
assert c.upper_bound == condition[idx].upper_bound
assert e.lower_bound == effect[idx].lower_bound
assert e.upper_bound == effect[idx].upper_bound
def test_should_visualize(self, _effect, _result, cfg):
assert repr(Effect(_effect, cfg=cfg)) == _result
def test_should_flatten_effect(self, _effect, _result, cfg):
assert _flatten(Effect(_effect, cfg=cfg)) == _result
def test_should_detect_change(self, _e, _result, cfg):
assert Effect(_e, cfg).specify_change == _result
