def test_crossing_change_pathfail_0(self):
"""Should raise error if randon_index
set to False and index not set or
not set to int"""
bw = BraidWord([1, 2, 3])
with self.assertRaises(ValueError) as te:
bw.crossing_change(random_index=False)
def test_crossing_change_pathsuccess_2(self):
"""Should return new BraidWord with
manually set generator inverted"""
bw = BraidWord([1, 2, 3])
newbraidword = bw.crossing_change(random_index=False, index=1)
# Check that manually set generator has been inverted
self.assertEqual(newbraidword.word, [1, -2, 3])
def test_crossing_change_pathsuccess_0(self):
"""Should return new BraidWord with
random generator inverted"""
bw = BraidWord([1, 2, 3])
newbraidword = bw.crossing_change()
# Check that one generator has been inverted
x = list((i == -abs(i) for i in newbraidword.word))
self.assertTrue(any(x) and not all(x))
def test_crossing_change_pathsuccess_1(self):
"""Should return new BraidWord with
same length as previous"""
bw = BraidWord([1, 2, 3])
newbraidword = bw.crossing_change()
self.assertEqual(len(newbraidword.word), 3)
