def test_write_subregion_to_file(self, n_dims, in_slice, out_slice,
machine_timestep, vector_address):
# Create the region
sr = SystemRegion(n_dims=n_dims, machine_timestep=machine_timestep)
# Store the address of the shared vector in SDRAM
sr.shared_vector_address = vector_address
# Write the region to file, assert the values are sane
fp = tempfile.TemporaryFile()
sr.write_subregion_to_file(fp, in_slice=in_slice, out_slice=out_slice)
fp.seek(0)
assert struct.unpack("<6I", fp.read()) == (
machine_timestep,
n_dims,
in_slice.start,
in_slice.stop - in_slice.start,
out_slice.stop - out_slice.start,
vector_address,
)
