def test_carn_doesnt_eat_when_no_herbs_available(self, example_properties):
"""
Asserts that carnivore hasn't gained weight after eat method when there
are no herbivores to be eaten.
"""
carnivore = Carnivore(example_properties)
old_weight = carnivore.weight
pop_herb = []
carnivore.attempt_eating_all_herbivores_in_cell(pop_herb)
assert carnivore.weight == old_weight
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
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
