jorisvandenbossche commented on code in PR #43590:
URL: https://github.com/apache/arrow/pull/43590#discussion_r1768909590
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python/pyarrow/tests/test_io.py:
##########
@@ -710,6 +710,15 @@ def test_non_cpu_buffer(pickle_module):
# Sliced buffers with same address
assert buf_on_gpu_sliced.equals(cuda_buf[2:4])
+ # Testing copying buffer
+ mm = ctx.memory_manager
+ for dest in [mm, mm.device]:
+ buf2 = cuda_buf.copy(dest)
+ cuda_buf2 = cuda.CudaBuffer.from_buffer(buf2)
+ assert cuda_buf2.size == cuda_buf.size
+ assert cuda_buf2.copy_to_host()[:] == b'testing'
+ assert cuda_buf2.device == mm.device
Review Comment:
```suggestion
assert buf2.device == mm.device
```
To test the actual resulting Buffer of the `copy` method?
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