old_contents: from django.test import TestCase
  from django.db import OperationalError
  
  
  class ApiTestUtils(TestCase):
      def test_db_timeout(self):
          from api.view_utils import db_timeout
  
          @db_timeout(1)
          def do_long_running_query():
                  from django.db import connection
                  cursor = connection.cursor()
                  cursor.execute("select pg_sleep(0.01);")
          self.assertRaises(OperationalError, do_long_running_query)
  
new_contents: from django.test import TestCase
  from django.db import OperationalError
  
  
  class ApiTestUtils(TestCase):
      def test_db_timeout(self):
          from api.view_utils import db_timeout
  
          @db_timeout(1)
          def do_long_running_query():
                  from django.db import connection
                  cursor = connection.cursor()
                  cursor.execute("select pg_sleep(0.01);")
          self.assertRaises(OperationalError, do_long_running_query)
  
      def test_param_to_list(self):
          from api.view_utils import param_to_list
  
          self.assertEquals(param_to_list('foo'), ['foo'])
          self.assertEquals(param_to_list('foo,bar'), ['foo', 'bar'])
          self.assertEquals(param_to_list('foo,bar'), ['foo', 'bar'])
          self.assertEquals(param_to_list(None), [])
          self.assertEquals(param_to_list([]), [])
  
subject: Add a missing test for param-parsing