def test_can_falsify_types_without_default_productions():
strategies = SearchStrategies()
strategies.define_specification_for(Bar, BarStrategy)
with pytest.raises(MissingSpecification):
SearchStrategies.default().strategy(Bar)
verifier = Verifier(search_strategies = strategies)
assert verifier.falsify(lambda x : False, Bar,)[0] == Bar()
assert verifier.falsify(lambda x : x.size() < 3, Bar)[0] == Bar(Bar(Bar()))
def __init__(self,
search_strategies=None,
starting_size=1.0,
warming_rate=0.5,
cooling_rate=0.1,
runs_to_explore_flags=3,
min_satisfying_examples=5,
max_size=512,
max_failed_runs=10):
self.search_strategies = search_strategies or SearchStrategies()
self.min_satisfying_examples = min_satisfying_examples
self.starting_size = starting_size
self.warming_rate = warming_rate
self.cooling_rate = cooling_rate
self.max_size = max_size
self.max_failed_runs = max_failed_runs
self.runs_to_explore_flags = runs_to_explore_flags
def test_can_falsify_types_without_default_productions():
strategies = SearchStrategies()
strategies.define_specification_for(Bar, BarStrategy)
with pytest.raises(MissingSpecification):
SearchStrategies.default().strategy(Bar)
verifier = Verifier(search_strategies=strategies)
assert verifier.falsify(
lambda x: False,
Bar,
)[0] == Bar()
assert verifier.falsify(lambda x: x.size() < 3, Bar)[0] == Bar(Bar(Bar()))
class StatefulStrategy(MappedSearchStrategy):
def __init__(self, strategies, descriptor, **kwargs):
SearchStrategy.__init__(self, strategies, descriptor, **kwargs)
step_strategies = [
StepStrategy(strategies, s) for s in descriptor.test_steps()
]
child_mapper = strategies.new_child_mapper()
child_mapper.define_specification_for(
Step, lambda sgs, _: sgs.strategy(one_of(step_strategies)))
self.mapped_strategy = child_mapper.strategy([Step])
def pack(self, x):
return TestRun(self.descriptor, x)
def unpack(self, x):
return x.steps
def simplify(self, x):
pruned = x.prune()
if pruned:
yield pruned
for y in MappedSearchStrategy.simplify(self, x):
yield y
SearchStrategies.default().define_specification_for_classes(
StatefulStrategy, subclasses_of=StatefulTest)
SearchStrategy.__init__(self, strategies, descriptor, **kwargs)
step_strategies = [
StepStrategy(strategies, s)
for s in descriptor.test_steps()
]
child_mapper = strategies.new_child_mapper()
child_mapper.define_specification_for(
Step,
lambda sgs, _: sgs.strategy(one_of(step_strategies))
)
self.mapped_strategy = child_mapper.strategy([Step])
def pack(self, x):
return TestRun(self.descriptor, x)
def unpack(self, x):
return x.steps
def simplify(self, x):
pruned = x.prune()
if pruned:
yield pruned
for y in MappedSearchStrategy.simplify(self, x):
yield y
SearchStrategies.default().define_specification_for_classes(
StatefulStrategy,
subclasses_of=StatefulTest
)
