old_contents: """Tests for tasks.py."""
  
  import time
  import unittest
  
  from . import events
  from . import futures
  from . import tasks
  
  
  class TaskTests(unittest.TestCase):
  
      def setUp(self):
          self.event_loop = events.new_event_loop()
          events.set_event_loop(self.event_loop)
  
      def tearDown(self):
          self.event_loop.close()
  
      def testTaskClass(self):
          @tasks.coroutine
          def notmuch():
              yield from []
              return 'ok'
          t = tasks.Task(notmuch())
          t._event_loop.run()
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'ok')
  
      def testTaskDecorator(self):
          @tasks.task
          def notmuch():
              yield from []
              return 'ko'
          t = notmuch()
          t._event_loop.run()
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'ko')
  
      def testSleep(self):
          @tasks.coroutine
          def sleeper(dt, arg):
              res = yield from futures.sleep(dt, arg)
              return res
          t = tasks.Task(sleeper(0.1, 'yeah'))
          t0 = time.monotonic()
          t._event_loop.run()
          t1 = time.monotonic()
          self.assertTrue(t1-t0 >= 0.09)
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'yeah')
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: """Tests for tasks.py."""
  
  import time
  import unittest
  
  from . import events
  from . import futures
  from . import tasks
  
  
  class TaskTests(unittest.TestCase):
  
      def setUp(self):
          self.event_loop = events.new_event_loop()
          events.set_event_loop(self.event_loop)
  
      def tearDown(self):
          self.event_loop.close()
  
      def testTaskClass(self):
          @tasks.coroutine
          def notmuch():
              yield from []
              return 'ok'
          t = tasks.Task(notmuch())
          t._event_loop.run()
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'ok')
  
      def testTaskDecorator(self):
          @tasks.task
          def notmuch():
              yield from []
              return 'ko'
          t = notmuch()
          t._event_loop.run()
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'ko')
  
      def testSleep(self):
          @tasks.coroutine
          def sleeper(dt, arg):
              yield from futures.sleep(dt/2)
              res = yield from futures.sleep(dt/2, arg)
              return res
          t = tasks.Task(sleeper(0.1, 'yeah'))
          t0 = time.monotonic()
          t._event_loop.run()
          t1 = time.monotonic()
          self.assertTrue(t1-t0 >= 0.09)
          self.assertTrue(t.done())
          self.assertEqual(t.result(), 'yeah')
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Test for sleep(dt) without extra arg.