def test_amount_returned_when_no_fodder_available_to_herb(
self, example_pop_herb):
"""
Tests available_fodder_herbivore method.
Asserts that no fodder is provided to the herbivore when there is no
fodder available.
"""
landscape = Landscape(example_pop_herb)
landscape.fodder_amount = 0
assert landscape.available_fodder_herbivore() == 0
assert landscape.fodder_amount == 0
def test_amount_returned_when_restricted_fodder_is_available_to_herb(
self, example_pop_herb):
"""
Tests available_fodder_herbivore method.
Asserts that all of the fodder in the cell is provided to a herbivore
when it's demand is larger than the amount of fodder available.
Also asserts that the amount of fodder left now is zero.
"""
landscape = Landscape(example_pop_herb)
landscape.fodder_amount = Herbivore.params["F"] / 2
old_fodder_amount = landscape.fodder_amount
available_fodder_to_herb = landscape.available_fodder_herbivore()
assert available_fodder_to_herb == Herbivore.params["F"] / 2
assert landscape.fodder_amount == old_fodder_amount - \
available_fodder_to_herb
def test_amount_returned_when_enough_fodder_is_available_to_herb(
self, example_pop_herb):
"""
Tests available_fodder_herbivore method.
Asserts that a herbivore is provided with the amount it desires, when
enough fodder is available.
Also asserts that the amount of fodder
provided is subtracted from the initial fodder amount.
"""
landscape = Landscape(example_pop_herb)
landscape.regrowth()
old_fodder_amount = landscape.fodder_amount
available_fodder_to_herb = landscape.available_fodder_herbivore()
assert available_fodder_to_herb == Herbivore.params["F"]
assert landscape.fodder_amount == old_fodder_amount - \
available_fodder_to_herb
