old_contents: import unittest
  import kerneltest
  
  class IRkernelTests(kerneltest.KernelTests):
      kernel_name = "ir"
  
      language_name = "R"
  
      code_hello_world = "print('hello, world')"
  
      completion_samples = [
          {
              'text': 'zi',
              'matches': {'zip'},
          },
      ]
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  import kerneltest
  
  class IRkernelTests(kerneltest.KernelTests):
      kernel_name = "ir"
  
      language_name = "R"
  
      code_hello_world = "print('hello, world')"
  
      completion_samples = [
          {
              'text': 'zi',
              'matches': {'zip'},
          },
      ]
  
      complete_code_samples = ['1', "print('hello, world')", "f <- function(x) {\n  x*2\n}"]
      incomplete_code_samples = ["print('hello", "f <- function(x) {\n  x*2"]
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add tests for is_complete requests