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https://github.com/unshackle-dl/unshackle.git
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71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
"""Unit tests for dl.drm_lock, the per-key-set lock that makes tracks sharing KIDs
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take turns so the second one reads the content keys out of the cache."""
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from __future__ import annotations
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from threading import Lock
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from typing import Any, Optional
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from uuid import UUID
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import pytest
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from unshackle.commands.dl import dl
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pytestmark = pytest.mark.unit
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KID_A = UUID("11111111111111111111111111111111")
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KID_B = UUID("22222222222222222222222222222222")
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class FakeDRM:
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def __init__(self, kids: Optional[list[Any]] = None, content_id: Optional[str] = None) -> None:
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self.kids = kids or []
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self.content_id = content_id
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class NamelessDRM:
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"""No kids and no content_id, so the class name is the only key left."""
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pass
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@pytest.fixture(autouse=True)
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def clean_locks() -> Any:
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dl.DRM_LOCKS.clear()
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yield
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dl.DRM_LOCKS.clear()
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def test_same_kid_set_shares_one_lock() -> None:
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lock = dl.drm_lock(FakeDRM(kids=[KID_A, KID_B]))
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assert isinstance(lock, type(Lock()))
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assert dl.drm_lock(FakeDRM(kids=[KID_A, KID_B])) is lock
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def test_kid_order_does_not_matter() -> None:
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first = dl.drm_lock(FakeDRM(kids=[KID_A, KID_B]))
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assert dl.drm_lock(FakeDRM(kids=[KID_B, KID_A])) is first
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def test_different_kids_get_different_locks() -> None:
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assert dl.drm_lock(FakeDRM(kids=[KID_A])) is not dl.drm_lock(FakeDRM(kids=[KID_B]))
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assert len(dl.DRM_LOCKS) == 2
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def test_no_kids_falls_back_to_content_id() -> None:
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lock = dl.drm_lock(FakeDRM(content_id="abc"))
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assert dl.drm_lock(FakeDRM(content_id="abc")) is lock
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assert dl.drm_lock(FakeDRM(content_id="def")) is not lock
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assert set(dl.DRM_LOCKS) == {"abc", "def"}
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def test_no_kids_and_no_content_id_falls_back_to_class_name() -> None:
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lock = dl.drm_lock(NamelessDRM())
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assert dl.drm_lock(NamelessDRM()) is lock
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assert set(dl.DRM_LOCKS) == {"NamelessDRM"}
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def test_empty_content_id_still_falls_back_to_class_name() -> None:
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dl.drm_lock(FakeDRM(content_id=""))
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assert set(dl.DRM_LOCKS) == {"FakeDRM"}
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