class RouletteWheelSelectionTest(unittest.TestCase):
"""Test selection using a roulette wheel selection scheme.
"""
def setUp(self):
self.selector = RouletteWheelSelection(NoMutation(), NoCrossover(),
NoRepair())
def test_select_best(self):
"""Ensure selection of a best organism in a population of 2.
"""
worst_genome = MutableSeq("0", TestAlphabet())
worst_org = Organism(worst_genome, test_fitness)
better_genome = MutableSeq("1", TestAlphabet())
better_org = Organism(better_genome, test_fitness)
new_pop = self.selector.select([worst_org, better_org])
for org in new_pop:
assert org == better_org, "Worse organism unexpectly selected."
def test_selection(self):
"""Test basic selection on a small population.
"""
pop = [random_organism() for org_num in range(50)]
new_pop = self.selector.select(pop)
assert len(new_pop) == len(pop), "Did not maintain population size."
class RouletteWheelSelectionTest(unittest.TestCase):
"""Test selection using a roulette wheel selection scheme.
"""
def setUp(self):
self.selector = RouletteWheelSelection(NoMutation(), NoCrossover(),
NoRepair())
def test_select_best(self):
"""Ensure selection of a best organism in a population of 2.
"""
worst_genome = MutableSeq("0", TestAlphabet())
worst_org = Organism(worst_genome, test_fitness)
better_genome = MutableSeq("1", TestAlphabet())
better_org = Organism(better_genome, test_fitness)
new_pop = self.selector.select([worst_org, better_org])
for org in new_pop:
self.assertEqual(org, better_org,
"Worse organism unexpectly selected.")
def test_selection(self):
"""Test basic selection on a small population.
"""
pop = [random_organism() for org_num in range(50)]
new_pop = self.selector.select(pop)
self.assertEqual(len(new_pop), len(pop),
"Did not maintain population size.")
def setUp(self):
self.selector = RouletteWheelSelection(NoMutation(), NoCrossover(),
NoRepair())
def setUp(self):
self.selector = RouletteWheelSelection(NoMutation(), NoCrossover(),
NoRepair())
