def test_diff_2(self):
a = IntervalVector([[-1, 1], [0, 2], [1, 5]])
b = IntervalVector(a)
l = a.diff(b)
self.assertEqual(len(l), 1)
self.assertEqual(l[0], IntervalVector.empty(3))
def test_empty(self):
a = IntervalVector.empty(3)
self.assertEqual(a.size(), 3)
self.assertEqual(len(a), 3)
self.assertTrue(a.is_empty())
def test_empty(self): a = IntervalVector.empty(3) self.assertEqual(a.size(), 3) self.assertEqual(len(a), 3) self.assertTrue(a.is_empty())
