old_contents: import unittest
  """ import function primesnumbers from prime_numbers file in order to test it"""
  from prime_numbers import primesnumbers
  
  class Test_prime_numbers(unittest.TestCase):
  	def test_returns_correct_primes(self):
  		""" Output should be prime numbers only"""
  		self.assertTrue(primesnumbers(25), [1, 3, 5, 7, 11, 13, 17, 19, 23])
  
  	
  	    
  if __name__ == "__main__":
  	unittest.main()
  
  
new_contents: import unittest
  """ import function primesnumbers from prime_numbers file in order to test it"""
  from prime_numbers import primesnumbers
  
  class Test_prime_numbers(unittest.TestCase):
  	def test_returns_correct_primes(self):
  		""" Output should be prime numbers only"""
  		self.assertTrue(primesnumbers(25), [1, 3, 5, 7, 11, 13, 17, 19, 23])
  
  	def test_asserts_input_not_negative(self):
  		""" Input should be a positive value"""
  		self.assertIsNot(primesnumbers(-5), 'Please don\'t input negatives')	
  	    
  if __name__ == "__main__":
  	unittest.main()
  
  
subject: add a function t assert input is positive int