File size: 2,592 Bytes
9422383 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | """Public Python runtime admission behavior that does not require Pi hardware."""
from __future__ import annotations
import hashlib
import json
import unittest
from pathlib import Path
from tempfile import TemporaryDirectory
from arm_yolo26n import Yolo26nError, Yolo26nTensorSession
def _write_model(directory: Path, payload: bytes) -> None:
directory.mkdir()
(directory / "model.bin").write_bytes(payload)
manifest = {
"kind": "yolo26n-exported-model",
"version": 1,
"model": {
"checkpoint_sha256": "0" * 64,
"class_names": ["first", "second"],
"input_shape": [1, 3, 320, 320],
"output_shape": [1, 6, 2100],
"target": {
"version": 1,
"target": "linux-aarch64-raspberry-pi-5",
"input_shape": [1, 3, 320, 320],
"input_dtype": "fp32",
"output_dtype": "fp32",
"thread_count": 4,
},
},
"artifact": {
"path": "model.bin",
"bytes": len(payload),
"sha256": hashlib.sha256(payload).hexdigest(),
},
}
(directory / "manifest.json").write_text(json.dumps(manifest), encoding="utf-8")
class RuntimeAdmissionTests(unittest.TestCase):
def test_session_requires_runtime_and_model_as_separate_inputs(self) -> None:
with TemporaryDirectory() as directory:
root = Path(directory)
with self.assertRaisesRegex(FileNotFoundError, "runtime library"):
Yolo26nTensorSession(runtime=root / "missing.so", model=root / "missing-model")
runtime = root / "libarm-yolo26n.so.0"
runtime.write_bytes(b"not loaded because model admission fails first")
with self.assertRaisesRegex(FileNotFoundError, "model directory"):
Yolo26nTensorSession(runtime=runtime, model=root / "missing-model")
def test_session_rejects_a_model_that_does_not_match_its_manifest(self) -> None:
with TemporaryDirectory() as directory:
root = Path(directory)
runtime = root / "libarm-yolo26n.so.0"
runtime.write_bytes(b"not loaded because model admission fails first")
model = root / "model"
_write_model(model, b"model")
(model / "model.bin").write_bytes(b"damaged")
with self.assertRaisesRegex(Yolo26nError, "'model.bin' does not match its manifest"):
Yolo26nTensorSession(runtime=runtime, model=model)
if __name__ == "__main__":
unittest.main()
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