old_contents: from echo_client import client
  
  
  def test_1():
      assert client('This is a unicode test') == 'This is a unicode test'
  
  
  def test_2():
      assert client(u'This is an é unicode test') == u'This is an é unicode test'
  
new_contents: from echo_client import client
  
  
  def test_1():
      assert client('This is a unicode test') == 'This is a unicode test'
  
  
  def test_2():
      assert client('This string is larger than my current buffer size. It should return all of the characters. This is the last sentence of this test.') == 'This string is larger than my current buffer size. It should return all of the characters. This is the last sentence of this test.'
  
  
  def test_3():
      assert client('') == ''
  
subject: Add long and empty strings for testing