def test_birth_does_not_add_new_baby_if_weight_too_low(self, mocker):
"""Test to show that if birth weight is too low, a new baby will not
be born"""
a_sim_1 = Herbivore(self.i, self.loc, weight=1)
mocker.return_value = True
a_sim_2 = Herbivore(self.i, self.loc, weight=1)
old_pop = a_sim_1.get_num_same_species(self.loc)
a_sim_1.birth()
new_pop = a_sim_1.get_num_same_species(self.loc)
assert old_pop == new_pop
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
