code: def test_stream_synchronize(self):
      # Tests that a stream synchronization does correctly cause all streams to wait
      # for one specific stream, but does not synchronize all streams with each other.
  
      self.assert_good_kernel_launch(
          stream_id(0), read_write=[tensor_id(1)]
      )
      self.assert_good_kernel_launch(
          stream_id(1), read_write=[tensor_id(2)]
      )
      self.handler._handle_stream_synchronization(stream_id(0))
  
      self.assert_good_kernel_launch(
          stream_id(2), read_only=[tensor_id(1)]
      )
      self.assert_good_kernel_launch(
          stream_id(3), read_only=[tensor_id(1)]
      )
      self.assert_bad_kernel_launch(
          1, stream_id(4), read_only=[tensor_id(2)]
      )
  
imports: import sys
  import textwrap
  import traceback
  from typing import List
  import torch
  import torch.cuda._sanitizer
  from torch.cuda._sanitizer import StreamId, DataPtr, EventId
  from torch.testing._internal.common_utils import TestCase, run_tests, NoTest, TEST_CUDA
label_desc: Use image node_id 23 for calling the TestEventHandler obj's underlying member method code with example usage: obj.test_stream_synchronize() without return types