def test_topo_remove_carnivore():
"""Tests that an emigrating animal can be removed from its old cells
animal list"""
cell = topo.Topography()
testcarni = animals.Carnivores()
testlist = [animals.Carnivores() for _ in range(10)]
cell.herbivore_list = testlist
cell.add_animal(testcarni)
cell.remove_animal(testcarni)
assert testcarni not in cell.herbivore_list
def test_annual_death_0_fitness_random_cells(test_map):
"""Tests that the method annual_death works in a random accessible cell"""
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=99, weight=0))
test_map.raster_model[(11, 8)].add_animal(ani.Carnivores(age=99, weight=0))
test_map._annual_death_all_cells()
assert test_map.raster_model[(3, 4)].herbivore_list == []
assert test_map.raster_model[(11, 8)].carnivore_list == []
def test_fitness_level_is_zero_when_weight_is_zero():
"""Tests that the fitness level is zero, when the weight is zero"""
herbivore = ani.Herbivores()
carnivore = ani.Carnivores()
herbivore.weight = 0
carnivore.weight = 0
assert herbivore.fitness == 0
assert carnivore.fitness == 0
def test_breed_certain_probability_all_in_cell():
"""Tests that all animals breed, when the breeding-probability = 1"""
cell = topo.Jungle()
for _ in range(100):
cell.add_animal(animals.Herbivores(age=10, weight=100))
cell.add_animal(animals.Carnivores(age=10, weight=100))
cell.breed_all_animals_in_cell()
assert len(cell.herbivore_list) == 200
assert len(cell.carnivore_list) == 200
def test_population_age_groups(test_map):
"""Tests that the method population_age_groups returns two arrays and two
lists"""
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=1, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=4, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=9, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=14, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=50, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=1, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=4, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=9, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=14, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=50, weight=10))
herb_list, carn_list, herb_mean_w_list, carn_mean_w_list = \
test_map.population_biomass_age_groups()
assert herb_list == [1, 1, 1, 1, 1]
assert carn_list == [-1, -1, -1, -1, -1]
assert herb_mean_w_list == [10, 10, 10, 10, 10]
assert carn_mean_w_list == [-10, -10, -10, -10, -10]
def strong_vs_weak():
"""Creates a test herbivore and carnivore instance"""
cell = topo.Desert()
herbivore = ani.Herbivores()
carnivore = ani.Carnivores()
herbivore.weight, herbivore.age = 1, 100
carnivore.weight, carnivore.age = 15, 52
cell.add_animal(herbivore)
cell.add_animal(carnivore)
return herbivore, carnivore, cell
def test_set_parameters(bad_parameters):
"""Test if the non allowed parameters raises a value error. """
carnivore = ani.Carnivores()
herbivore = ani.Herbivores()
with pytest.raises(ValueError):
carnivore.set_parameters(bad_parameters)
with pytest.raises(ValueError):
herbivore.set_parameters(bad_parameters)
carnivore.set_parameters({"w_birth": 6.0})
assert carnivore.parameters["w_birth"] == 6.0
def test_feeding_carnivores_in_a_cell():
"""Tests if the most fit herbivore kills the least fit herbivore etc"""
animals.Carnivores.set_parameters({"DeltaPhiMax": 0.1})
jungle_cell = topo.Jungle()
[jungle_cell.add_animal(animals.Herbivores()) for _ in range(10)]
[jungle_cell.add_animal(animals.Carnivores(weight=80)) for _ in range(10)]
assert jungle_cell.biomass_carnivores() == 800
pre_feeding_herbi_biomass = jungle_cell.biomass_herbivores()
jungle_cell.feed_carnivores_in_cell()
assert pre_feeding_herbi_biomass > jungle_cell.biomass_herbivores()
def test_ek_for_cell_9_herbs_carns_100_fodder(basic_jungle):
"""Tests that the ek formula for herbivores and carnivores are correct"""
basic_jungle.fodder = 100
for _ in range(9):
basic_jungle.add_animal(animals.Herbivores(weight=10))
basic_jungle.add_animal(animals.Carnivores())
animals.Carnivores.parameters["F"] = 50
ek_herbivores = basic_jungle.ek_for_cell("Herbivores")
ek_carnivores = basic_jungle.ek_for_cell("Carnivores")
assert ek_herbivores == 1
assert ek_carnivores == 0.18
def test_biomass_food_chain(test_map):
"""Tests that the method biomass_food_chain returns a dictionary with the
correct islands total biomass of fodder, herbivores and carnivores"""
test_map.raster_model[(3, 4)].add_animal(ani.Herbivores(age=99, weight=10))
test_map.raster_model[(3, 4)].add_animal(ani.Carnivores(age=1, weight=100))
for cell in test_map.raster_model.values():
if cell.is_accessible:
cell.fodder = 0
biomass_dict = test_map.biomass_food_chain()
assert biomass_dict.get('biomass_fodder') == 0
assert biomass_dict.get('biomass_herbs') == 10
assert biomass_dict.get('biomass_carnivores') == 100
def test_remove_carnivore():
"""Test that a carnivore can be removed"""
jungle_cell = topo.Jungle()
test_carnivore = animals.Carnivores()
jungle_cell.add_animal(test_carnivore)
assert test_carnivore in animals.Animals.instances
assert test_carnivore in jungle_cell.carnivore_list
jungle_cell.remove_animal(test_carnivore)
assert test_carnivore in animals.Animals.instances
assert test_carnivore not in jungle_cell.carnivore_list
animals.Animals.instances.remove(test_carnivore)
assert test_carnivore not in animals.Animals.instances
def low_fitness_animals():
"""Creates some test instances with very low fitness"""
jungle_cell = topo.Jungle()
herbivore = animals.Herbivores()
carnivore = animals.Carnivores()
carnivore.weight, carnivore.age = 1, 1000
herbivore.weight, herbivore.age = 1, 1000
herbivore.parameters["omega"] = 1
carnivore.parameters["omega"] = 1
jungle_cell.add_animal(herbivore)
jungle_cell.add_animal(carnivore)
return jungle_cell
def test_breed_all_cells_certain_prob_random_cell(test_map):
"""Test that the method 'breed_all_cell' works in a random accessible
cell"""
for _ in range(100):
test_map.raster_model[(3,
4)].add_animal(ani.Herbivores(age=0,
weight=100))
test_map.raster_model[(11,
8)].add_animal(ani.Carnivores(age=0,
weight=100))
test_map._breed_in_all_cells()
assert len(test_map.raster_model[(3, 4)].herbivore_list) == 200
assert len(test_map.raster_model[(11, 8)].carnivore_list) == 200
def test_what_cell_two_options_equal_probability():
"""Test that a carnivores chances to migrate to two cells with equal ek
are 50-50"""
testanimal = ani.Carnivores(age=0, weight=100)
testanimal.parameters["mu"] = 10
current_cell = (10, 10)
mock_ek = {(11, 10): 1, (10, 11): 1}
random.seed(2)
decisionlist = [
testanimal.what_cell_to_migrate_to(current_cell, mock_ek)
for _ in range(1000)
]
times_11_10_chosen = decisionlist.count((11, 10))
assert 490 < times_11_10_chosen < 510
def test_topo_add_carnivore():
"""Tests that an immigrating animal can be added to the new cells
animal list"""
instance = topo.Topography()
instance.add_animal(animals.Carnivores())
assert len(instance.carnivore_list) == 1
