def setUp(self):
self.trans=dict()
self.trans['ym'],self.trans['yb'] = sf.translation(-1,10,1,500)
self.trans['tm'],self.trans['tb'] = sf.translation(-1,10,1,500)
def testTranslationGenerator(self):
a,b = sf.translation(1,2,3,5)
self.assertEqual(a*1+b,2)
self.assertEqual(a*3+b,5)