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_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
def test_topo_current_occupants_positive():
"""Test that the numbers of herbivore and carnivores occupants in a cell
is either 0 or positive"""
instance = topo.Topography()
assert instance.current_occupants()["Herbivores"] >= 0\
and instance.current_occupants()["Carnivores"] >= 0
def test_topo_current_fodder():
"""Test that the amount of fodder is a float and greater than 0"""
instance = topo.Topography()
assert type(instance.current_fodder()) == float \
and instance.current_fodder() >= 0
def test_topo_current_occupants_int():
"""Test that the numbers of herbivore and carnivores occupants in a cell
is an int"""
instance = topo.Topography()
assert type(instance.current_occupants()["Herbivores"]) == int and type(
instance.current_occupants()["Carnivores"]) == int