text: from shaape.scalable import Scalable
  import nose
  import unittest
  from nose.tools import *
  
  class TestScalable(unittest.TestCase):
      def test_init(self):
          scalable = Scalable()
          assert scalable != None
  
      def test_scale(self):
          scalable = Scalable()
          assert_raises(NotImplementedError, scalable.scale, (1, 2))
  