def test_extend(self):
"""
Tests the extend function.
"""
l1 = LongArray(5)
for i in range(5):
l1[i] = i
l2 = LongArray(5)
for i in range(5):
l2[i] = 5 + i
l1.extend(l2.get_npy_array())
self.assertEqual(l1.length, 10)
self.assertEqual(numpy.allclose(l1.get_npy_array(), numpy.arange(10)), True)
