mirror of
https://github.com/Abdess/retroarch_system.git
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105 lines
3.8 KiB
Python
105 lines
3.8 KiB
Python
"""Tests for the TorrentZip builder against real MAME romsets."""
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from __future__ import annotations
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import hashlib
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import os
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import sys
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import tempfile
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import unittest
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import zipfile
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REPO_ROOT = os.path.join(os.path.dirname(__file__), "..")
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sys.path.insert(0, os.path.join(REPO_ROOT, "scripts"))
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from torrentzip import ( # noqa: E402
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build_torrentzip,
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identify_romset,
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is_torrentzip,
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rebuild_torrentzip,
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)
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class TorrentZipTest(unittest.TestCase):
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"""The format is deterministic: same members always give the same bytes."""
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def test_deterministic_output(self):
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members = [("b.rom", b"second"), ("a.rom", b"first")]
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self.assertEqual(build_torrentzip(members), build_torrentzip(members))
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def test_member_order_is_irrelevant(self):
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a = build_torrentzip([("a.rom", b"one"), ("b.rom", b"two")])
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b = build_torrentzip([("b.rom", b"two"), ("a.rom", b"one")])
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self.assertEqual(a, b)
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def test_case_insensitive_sorting(self):
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data = build_torrentzip([("B.rom", b"x"), ("a.rom", b"y")])
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with zipfile.ZipFile(_as_file(self, data)) as zf:
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self.assertEqual([i.filename for i in zf.infolist()], ["a.rom", "B.rom"])
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def test_fixed_timestamp_and_signature(self):
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data = build_torrentzip([("a.rom", b"payload")])
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with zipfile.ZipFile(_as_file(self, data)) as zf:
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self.assertEqual(zf.infolist()[0].date_time, (1996, 12, 24, 23, 32, 0))
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self.assertTrue(zf.comment.decode().startswith("TORRENTZIPPED-"))
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def test_roundtrip_readable_content(self):
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data = build_torrentzip([("a.rom", b"hello"), ("b.rom", b"world")])
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with zipfile.ZipFile(_as_file(self, data)) as zf:
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self.assertEqual(zf.read("a.rom"), b"hello")
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self.assertEqual(zf.read("b.rom"), b"world")
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def test_rebuild_matches_real_mame_set(self):
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"""Rebuilding a shipped MAME romset reproduces it byte for byte."""
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candidates = [
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os.path.join(REPO_ROOT, "bios", "Arcade", "Arcade", "naomi2.zip"),
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os.path.join(REPO_ROOT, "bios", "Arcade", "MAME", "naomi2.zip"),
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]
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checked = 0
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for path in candidates:
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if not os.path.exists(path) or not is_torrentzip(path):
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continue
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with open(path, "rb") as fh:
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original = fh.read()
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self.assertEqual(rebuild_torrentzip(path), original, path)
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checked += 1
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if not checked:
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self.skipTest("no TorrentZip romset available")
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def test_identify_romset_selects_matching_recipe(self):
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atoms = {"3610a686": b"alpha", "9d0d1b46": b"beta"}
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import zlib
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atoms = {
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f"{zlib.crc32(b'alpha') & 0xffffffff:08x}": b"alpha",
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f"{zlib.crc32(b'beta') & 0xffffffff:08x}": b"beta",
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}
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crc_a, crc_b = list(atoms)
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wanted = hashlib.md5(
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build_torrentzip([("a.rom", b"alpha"), ("b.rom", b"beta")])
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).hexdigest()
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recipes = {
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"v1": [("a.rom", crc_a)],
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"v2": [("a.rom", crc_a), ("b.rom", crc_b)],
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}
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self.assertEqual(identify_romset(recipes, atoms, wanted), "v2")
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self.assertIsNone(identify_romset(recipes, atoms, "0" * 32))
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def test_identify_romset_skips_recipes_with_absent_atoms(self):
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atoms = {"aaaaaaaa": b"x"}
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recipes = {"v1": [("a.rom", "ffffffff")]}
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self.assertIsNone(identify_romset(recipes, atoms, "0" * 32))
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def _as_file(test: unittest.TestCase, data: bytes) -> str:
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"""Write bytes to a temp file cleaned up with the test."""
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fd, path = tempfile.mkstemp(suffix=".zip")
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os.close(fd)
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with open(path, "wb") as fh:
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fh.write(data)
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test.addCleanup(os.unlink, path)
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return path
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if __name__ == "__main__":
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unittest.main()
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