old_contents: # coding: utf-8
  from IPython.lib import passwd
  from IPython.lib.security import passwd_check, salt_len
  import nose.tools as nt
  
  def test_passwd_structure():
      p = passwd('passphrase')
      algorithm, salt, hashed = p.split(':')
      nt.assert_equal(algorithm, 'sha1')
      nt.assert_equal(len(salt), salt_len)
      nt.assert_equal(len(hashed), 40)
  
  def test_roundtrip():
      p = passwd('passphrase')
      nt.assert_equal(passwd_check(p, 'passphrase'), True)
  
  def test_bad():
      p = passwd('passphrase')
      nt.assert_equal(passwd_check(p, p), False)
      nt.assert_equal(passwd_check(p, 'a:b:c:d'), False)
      nt.assert_equal(passwd_check(p, 'a:b'), False)
  
  def test_passwd_check_unicode():
      # GH issue #4524
      phash = u'sha1:23862bc21dd3:7a415a95ae4580582e314072143d9c382c491e4f'
      assert passwd_check(phash, u"łe¶ŧ←↓→")
new_contents: # coding: utf-8
  from IPython.lib import passwd
  from IPython.lib.security import passwd_check, salt_len
  
  def test_passwd_structure():
      p = passwd("passphrase")
      algorithm, salt, hashed = p.split(":")
      assert algorithm == "sha1"
      assert len(salt) == salt_len
      assert len(hashed) == 40
  
  def test_roundtrip():
      p = passwd("passphrase")
      assert passwd_check(p, "passphrase") is True
  
  
  def test_bad():
      p = passwd('passphrase')
      assert passwd_check(p, p) is False
      assert passwd_check(p, "a:b:c:d") is False
      assert passwd_check(p, "a:b") is False
  
  
  def test_passwd_check_unicode():
      # GH issue #4524
      phash = u'sha1:23862bc21dd3:7a415a95ae4580582e314072143d9c382c491e4f'
      assert passwd_check(phash, u"łe¶ŧ←↓→")
  
subject: remove nose from test_security