def test_kill_prey(self):
"""
Test kill prey. With a high fitness diff the carnivore will always kill the herbivore.
"""
carn = Carnivore(age=5, weight=30)
herb_list = [Herbivore(age=100, weight=50) for _ in range(100)]
mock_sorted_list = [(herb, herb.fitness) for herb in herb_list]
kill_count = 0
for _ in mock_sorted_list:
if carn.kill_prey(mock_sorted_list):
kill_count += 1
assert kill_count == 100
def test_weight_gain(self, reset_carnivore_params, reset_herbivore_params,
params):
"""
Testing weight gain of carnivores. Assuming they have access to more fodder than they
will eat. Making old heavy herbivores with low fitness. Carnivores should add beta * F
weight
Assuming fitness diff is larger than DeltaPhiMax such that the carnivore always kills
the herbivore.
"""
carn = Carnivore(age=5, weight=40)
# number of herbivores
N = 1000
herb_list = [Herbivore(age=100, weight=200) for _ in range(N)]
mock_sorted_list = [(herb, herb.fitness) for herb in herb_list]
initial_weight = carn.weight
_ = carn.kill_prey(mock_sorted_list)
new_weight = carn.weight
assert new_weight == initial_weight + carn.p["beta"] * carn.p["F"]