import sys
import unittest

class TestCase(unittest.TestCase):
    
    def testFrameSimpleChange(self):
        frame = sys._getframe()
        a = 20
        frame.f_locals['a'] = 50
        frame.savelocals()
        self.assertEquals(50, a)
        
    def testFrameChangeInInnerFrame(self):
        def change(f):
            self.assert_(f is not sys._getframe())
            f.f_locals['a'] = 50
            f.savelocals()
            
        frame = sys._getframe()
        a = 20
        change(frame)
        self.assertEquals(50, a)
        
if __name__ == '__main__':
    unittest.main()