def test_false_when_prob_of_killing_is_zero(self, example_properties):
"""
Asserts that kill method returns False when prob_kill is zero.
"""
herbivore = Herbivore(example_properties)
carnivore = Carnivore(example_properties)
herbivore.find_fitness()
carnivore.fitness = 0.5
assert carnivore.kill(herbivore) is False
def test_true_when_prob__of_killing_is_one(self, teardown_carnivore_tests,
example_properties):
"""
Asserts that kill method returns True when prob_kill is one.
"""
herbivore = Herbivore(example_properties)
carnivore = Carnivore(example_properties)
herbivore.find_fitness()
carnivore.find_fitness()
carnivore.params["DeltaPhiMax"] = 0.1
assert carnivore.kill(herbivore) is True
def test_list_of_herbs_returned(self, example_properties,
teardown_carnivore_tests):
"""
Asserts that eat method returns a list of herbivore class instances
when the carnivore has eaten a herbivore.
"""
carnivore = Carnivore(example_properties)
carnivore.find_fitness()
carnivore.params["DeltaPhiMax"] = 0.1
herb = Herbivore(example_properties)
herb.find_fitness()
eaten_herbs = carnivore.attempt_eating_all_herbivores_in_cell([herb])
assert type(eaten_herbs) is list
def test_carn_gained_weight_after_eating(self, example_properties,
teardown_carnivore_tests):
"""
Assert that carnivore has gained weight after eat method
when there is a weaker herbivore available.
"""
carnivore = Carnivore(example_properties)
carnivore.find_fitness()
old_weight = carnivore.weight
carnivore.params["DeltaPhiMax"] = 0.1
herb = Herbivore(example_properties)
herb.find_fitness()
carnivore.attempt_eating_all_herbivores_in_cell([herb])
assert old_weight < carnivore.weight
