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import os
import sys
import numpy as np
import pytest
import asdf
@pytest.mark.skipif(
sys.platform.startswith("win"), reason="os.pipe.seek noop on windows: https://bugs.python.org/issue42602"
)
def test_failure_to_write_blocks_to_non_seekable_file():
"""
ASDF fails to write blocks to non-seekable file
https://github.com/asdf-format/asdf/issues/1542
"""
r, w = os.pipe()
with os.fdopen(r, "rb") as rf:
with os.fdopen(w, "wb") as wf:
arrs = [np.zeros(1, dtype="uint8") + i for i in range(10)]
af = asdf.AsdfFile({"arrs": arrs})
af.write_to(wf)
with asdf.open(rf) as raf:
for a, ra in zip(arrs, raf["arrs"]):
np.testing.assert_array_equal(a, ra)
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