old_contents: import unittest
  import stoc
  class TestStringMethods(unittest.TestCase):
  
  	def test_upper(self):
  		self.assertEqual('foo'.upper(), 'FOO')
  
  	def test_isupper(self):
  		self.assertTrue('FOO'.isupper())
  		self.assertFalse('Foo'.isupper())
  
  	def test_split(self):
  		s = 'hello world'
  		self.assertEqual(s.split(), ['hello', 'world'])
  		# check that s.split fails when the separator is not a string
  		with self.assertRaises(TypeError):
  			s.split(2)
  
  	def test_test(self):
  		self.assertTrue(True)
  
  	def test_import(self):
  		self.assertEqual(stoc.__author__, 'Jacob Hwang <yz0624@gmail.com>')
  
  	def test_bm(self):
  		self.assertEqual(stoc.bm(), 0)
  
  	def test_sde(self):
  		self.assertEqual(stoc.sde(), "hello")
  
  	def test_bsde(self):
  		self.assertEqual(stoc.bsde(), "hello")
new_contents: import unittest
  import stoc
  class TestStocMethods(unittest.TestCase):
  
  	def test_upper(self):
  		self.assertEqual('foo'.upper(), 'FOO')
  
  	def test_isupper(self):
  		self.assertTrue('FOO'.isupper())
  		self.assertFalse('Foo'.isupper())
  
  	def test_split(self):
  		s = 'hello world'
  		self.assertEqual(s.split(), ['hello', 'world'])
  		# check that s.split fails when the separator is not a string
  		with self.assertRaises(TypeError):
  			s.split(2)
  
  	def test_test(self):
  		self.assertTrue(True)
  
  	def test_import(self):
  		self.assertEqual(stoc.__author__, 'Jacob Hwang <yz0624@gmail.com>')
  
  	def test_bm(self):
  		self.assertEqual(stoc.bm(), 0)
  
  	def test_sde(self):
  		self.assertEqual(stoc.sde(), "hello")
  
  	def test_bsde(self):
  		self.assertEqual(stoc.bsde(), "hello")
subject: change class name