def test_will_birth(self, mocker):
"""Tests that the will_birth method works correctly.
The weights of herbivores and carnivores are set as needed to have the
correct return object from the will_birth method.
The mocker is used to give spesific values from random functions used
in the module.
"""
h = Herb()
c = Carn()
h.weight = 0
c.weight = 0
return_object_herb = h.will_birth(10)
return_object_carn = c.will_birth(10)
assert return_object_herb is None
assert return_object_carn is None
mocker.patch("random.uniform", return_value=0)
h = Herb()
c = Carn()
h.weight = 100
c.weight = 100
return_object_herb = h.will_birth(10000)
return_object_carn = c.will_birth(10000)
assert isinstance(return_object_herb, Herb)
assert isinstance(return_object_carn, Carn)
def test_weightloss(self, mocker):
"""Tests that the weight is updated according to the weightloss method.
The mocker is used to give spesific values from random functions used
in the module.
"""
mocker.patch("numpy.random.normal", return_value=1)
h = Herb()
h.weightloss()
assert h.weight == 1 - h.eta * 1
h.weight = 100000
c = Carn()
c.weight = 100000
weight_list_herb = []
weight_list_carn = []
for _ in range(100):
weight_list_herb.append(h.weight)
weight_list_carn.append(c.weight)
h.weightloss()
c.weightloss()
assert all([
weight1 > weight2 for weight1, weight2 in zip(
weight_list_herb[:-1], weight_list_herb[1:])
]), "The weight does not decrease in the list when weightloss is used"
assert all([
weight1 > weight2 for weight1, weight2 in zip(
weight_list_carn[:-1], weight_list_carn[1:])
]), "The weight does not decrease in the list when weightloss is used"
def test_fitness_update(self, mocker):
"""Tests that the fitness gets updated for given values of weight.
The mocker is used to give spesific values from random functions used
in the module.
"""
h = Herb()
c = Carn()
h.weight = -3
c.weight = -2
h.fitness_update()
c.fitness_update()
assert h.fitness == 0
assert c.fitness == 0
mocker.patch("numpy.random.normal", return_value=0)
h = Herb()
c = Carn()
h.fitness_update()
c.fitness_update()
assert h.fitness == 0
assert c.fitness == 0
mocker.patch("numpy.random.normal", return_value=1)
h = Herb()
c = Carn()
h.fitness_update()
c.fitness_update()
assert h.fitness == pytest.approx(
1 / (1 + m.exp(h.phi_age * (h.a - h.a_half))) * 1 /
(1 + m.exp(-h.phi_weight * (1 - h.w_half))))
assert c.fitness == pytest.approx(
1 / (1 + m.exp(c.phi_age * (c.a - c.a_half))) * 1 /
(1 + m.exp(-c.phi_weight * (1 - c.w_half))))
def test_fitness_update(self, mocker):
h = Herb()
c = Carn()
h.weight = -3
c.weight = -2
h.fitness_update()
c.fitness_update()
assert h.fitness == 0
assert c.fitness == 0
mocker.patch('numpy.random.normal', return_value=0)
h = Herb()
c = Carn()
h.fitness_update()
c.fitness_update()
assert h.fitness == 0
assert c.fitness == 0
mocker.patch('numpy.random.normal', return_value=1)
h = Herb()
c = Carn()
h.fitness_update()
c.fitness_update()
assert h.fitness == pytest.approx(
1 / (1 + m.exp(h.phi_age * (h.a - h.a_half))) * 1 /
(1 + m.exp(-h.phi_weight * (1 - h.w_half))))
assert c.fitness == pytest.approx(
1 / (1 + m.exp(c.phi_age * (c.a - c.a_half))) * 1 /
(1 + m.exp(-c.phi_weight * (1 - c.w_half))))
def test_will_birth(self, mocker):
h = Herb()
c = Carn()
h.weight = 0
c.weight = 0
return_object_herb = h.will_birth(10)
return_object_carn = c.will_birth(10)
assert return_object_herb is None
assert return_object_carn is None
mocker.patch('random.uniform', return_value=0)
h = Herb()
c = Carn()
h.weight = 100
c.weight = 100
return_object_herb = h.will_birth(10000)
return_object_carn = c.will_birth(10000)
assert isinstance(return_object_herb, Herb)
assert isinstance(return_object_carn, Carn)
def test_weightloss(self, mocker):
mocker.patch('numpy.random.normal', return_value=1)
h = Herb()
h.weightloss()
assert h.weight == 1 - h.eta * 1
h.weight = 100000
c = Carn()
c.weight = 100000
weight_list_herb = []
weight_list_carn = []
for _ in range(100):
weight_list_herb.append(h.weight)
weight_list_carn.append(c.weight)
h.weightloss()
c.weightloss()
assert all([
weight1 > weight2 for weight1, weight2 in zip(
weight_list_herb[:-1], weight_list_herb[1:])
])
assert all([
weight1 > weight2 for weight1, weight2 in zip(
weight_list_carn[:-1], weight_list_carn[1:])
])