def test_birth_does_not_happen_if_prob_0(self, mocker):
"""Test to show that birth method does not add new pop if
birth does not occur
"""
mocker.patch('random.random', return_value=1)
loc = (2, 7)
i_sim = Island()
a_sim_1 = Herbivore(i_sim, loc, weight=100)
a_sim_2 = Herbivore(i_sim, loc, weight=100)
a_sim_1.birth()
assert i_sim.get_num_herb_on_loc(loc) == 2
def test_birth_adds_to_num_herb_on_loc(self, mocker):
"""Test to show that birth method adds new pop to herb_pop list
when birth occurs
"""
mocker.patch('random.random', return_value=0)
loc = (2, 7)
i_sim = Island()
a_sim_1 = Herbivore(i_sim, loc, weight=100)
a_sim_2 = Herbivore(i_sim, loc, weight=100)
a_sim_1.birth()
assert i_sim.get_num_herb_on_loc(loc) == 3
def test_get_num_animals_on_loc(self):
"""Tests if the get animals on location method can return the number
of animals placed out on the map.
"""
i = Island()
num_herb = 4
num_carn = 3
loc = (2, 7)
for _ in range(num_herb):
Herbivore(i, loc)
for _ in range(num_carn):
Carnivore(i, loc)
assert i.get_num_herb_on_loc(loc) == num_herb
assert i.get_num_carn_on_loc(loc) == num_carn
def test_migration_removes_pop_from_loc_and_adds_to_odder(self, mocker):
"""Test to show that migration removes population from initial
loc to the chosen destination when the mocked value for will_move
is set to True
"""
mocker.return_value = True
loc_with_one_place_to_move = (1, 1)
i = Island(self.spes_geogr_2)
h = Herbivore(i, loc_with_one_place_to_move)
old_loc = h.get_loc()
h.migrate()
new_loc = h.get_loc()
assert i.get_num_herb_on_loc(old_loc) == 0
assert i.get_num_herb_on_loc(new_loc) == 1
assert old_loc != new_loc