def test_return_parents_if_same(self):
"""
If both parents have the same chromosome then just return the parents.
"""
mum = Genome([1, 2, 3])
dad = Genome([1, 2, 3])
result = crossover(mum, dad, Genome)
self.assertEqual(mum, result[0],
"Child expected to be the same as parent.")
self.assertEqual(mum, result[0],
"Child expected to be the same as parent.")
def test_creates_two_babies(self):
"""
If the parents are different ensures that the children are the result
of an expected crossover.
"""
mum = Genome([1, 2, 3, 4])
dad = Genome(['a', 'b', 'c', 'd'])
result = crossover(mum, dad, Genome)
# There must be two children.
self.assertEqual(2, len(result))
# The randint call in crossover will choose 2 given random.seed(5).
expected1 = Genome([1, 2, 'c', 'd'])
expected2 = Genome(['a', 'b', 3, 4])
self.assertEqual(expected1, result[0],
"Expected: %r Got: %r" % (expected1, result[0]))
self.assertEqual(expected2, result[1],
"Expected: %r Got: %r" % (expected2, result[1]))
