def test_true_if_death_prob_is_zero(self, example_properties_w_40):
"""
Assert that will_animal_live returns True if probability of dying
is zero because of high fitness.
"""
numpy.random.seed(1)
animal = Animal(example_properties_w_40)
assert animal.will_animal_live() is True
def test_not_true_if_death_prob_is_one(self, example_properties_w_20):
"""
Assert that will_animal_live does not return True if probability of
dying is one.
"""
animal = Animal(example_properties_w_20)
animal.weight = 0
animal.find_fitness()
assert animal.will_animal_live() is not True
def test_true_if_rand_num_more_than_death_prob(self,
example_properties_w_20,
mocker):
"""
Asserts that will_animal_live returns True if the random number is
larger than the death probability.
"""
mocker.patch('numpy.random.random', return_value=0.5)
animal = Animal(example_properties_w_20)
animal.find_fitness()
assert animal.will_animal_live() is True