code: def test_wait_stream_cuda_cuda(self, cuda_sleep):
      source = current_stream(torch.device("cuda"))
      target = new_stream(torch.device("cuda"))
      self._test_wait_stream(source, target, cuda_sleep)
  
imports: import pytest
  import torch
  from fairscale.nn.pipe.stream import CPUStream, current_stream, default_stream, get_device, is_cuda, new_stream, record_stream, use_device, use_stream, wait_stream
label_desc: Use image node_id 5 for calling the TestWaitStream obj's underlying member method code with example usage: obj.test_wait_stream_cuda_cuda(cuda_sleep) without return types