def test_Cat(self):
v = Vt.FloatArray((1, 2, 3, 4, 5, 6))
vcat = Vt.Cat(v, v)
self.assertEqual(len(vcat), 12)
self.assertEqual(vcat[11], 6)
vcat = Vt.Cat(Vt.Cat(v), Vt.Cat(v, v, v, v), Vt.Cat(v, v, v, v, v))
self.assertEqual(len(vcat), 60)
self.assertEqual(vcat[58], 5)
vcat = Vt.Cat(v, self.empty)
self.assertEqual(vcat, Vt.Cat(v))
e = Vt.Cat(self.empty, self.empty)
self.assertEqual((len(e)), 0)
