mirror of
https://github.com/unshackle-dl/unshackle.git
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imSp4rky
2f8492ebaf
Opt-in --adaptive-workers (AIMD scaling + tail range-split), request/rnet session parity, and fixes for resume poisoning, truncated-segment acceptance, 416 handling, and byte-range-slice corruption. Tests + docs.
180 lines
7.2 KiB
Python
180 lines
7.2 KiB
Python
"""Unit tests for unshackle.core.api.errors."""
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from __future__ import annotations
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import json
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import pytest
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from unshackle.core.api.errors import (APIError, APIErrorCode, build_error_response, categorize_exception,
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handle_api_exception)
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pytestmark = pytest.mark.unit
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def _body(resp) -> dict:
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return json.loads(resp.body.decode("utf-8"))
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def test_api_error_default_http_status_per_code() -> None:
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# Every live APIErrorCode and the status a client observes for it. This is the
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# status half of the error contract PRD 05 must preserve through the collapse.
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cases = {
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APIErrorCode.INVALID_INPUT: 400,
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APIErrorCode.INVALID_SERVICE: 400,
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APIErrorCode.INVALID_PROXY: 400,
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APIErrorCode.INVALID_PARAMETERS: 400,
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APIErrorCode.AUTH_FAILED: 401,
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APIErrorCode.FORBIDDEN: 403,
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APIErrorCode.GEOFENCE: 403,
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APIErrorCode.NOT_FOUND: 404,
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APIErrorCode.NO_CONTENT: 404,
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APIErrorCode.JOB_NOT_FOUND: 404,
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APIErrorCode.SESSION_NOT_FOUND: 404,
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APIErrorCode.TRACK_NOT_FOUND: 404,
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APIErrorCode.CONFLICT: 409,
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APIErrorCode.RATE_LIMITED: 429,
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APIErrorCode.INTERNAL_ERROR: 500,
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APIErrorCode.DOWNLOAD_ERROR: 500,
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APIErrorCode.WORKER_ERROR: 500,
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APIErrorCode.SERVICE_ERROR: 502,
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APIErrorCode.DRM_ERROR: 502,
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APIErrorCode.NETWORK_ERROR: 503,
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APIErrorCode.SERVICE_UNAVAILABLE: 503,
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}
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# Lock that the cases above are the *complete* live set — a new/removed code trips this.
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assert {c.name for c in cases} == {c.name for c in APIErrorCode}
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for code, expected in cases.items():
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assert APIError(code, "x").http_status == expected, code
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def test_api_error_explicit_http_status_overrides_default() -> None:
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err = APIError(APIErrorCode.INVALID_INPUT, "x", http_status=418)
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assert err.http_status == 418
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def test_build_error_response_from_api_error() -> None:
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err = APIError(
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APIErrorCode.SESSION_NOT_FOUND,
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"no such session",
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details={"session_id": "abc"},
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retryable=False,
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)
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resp = build_error_response(err)
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assert resp.status == 404
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body = _body(resp)
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assert body["status"] == "error"
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assert body["error_code"] == "SESSION_NOT_FOUND"
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assert body["message"] == "no such session"
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assert body["details"] == {"session_id": "abc"}
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assert "retryable" not in body
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assert "debug_info" not in body
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assert "timestamp" in body
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def test_build_error_response_retryable_flag() -> None:
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err = APIError(APIErrorCode.NETWORK_ERROR, "boom", retryable=True)
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body = _body(build_error_response(err))
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assert body["retryable"] is True
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def test_build_error_response_from_generic_exception() -> None:
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resp = build_error_response(RuntimeError("oops"))
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assert resp.status == 500
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body = _body(resp)
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assert body["error_code"] == "INTERNAL_ERROR"
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assert body["message"] == "oops"
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def test_build_error_response_debug_mode_includes_traceback() -> None:
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try:
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raise ValueError("kaboom")
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except ValueError as e:
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resp = build_error_response(e, debug_mode=True, extra_debug_info={"foo": "bar"})
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body = _body(resp)
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assert body["debug_info"]["exception_type"] == "ValueError"
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assert "traceback" in body["debug_info"]
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assert body["debug_info"]["foo"] == "bar"
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@pytest.mark.parametrize(
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"exc, expected_code",
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[
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(Exception("Invalid credentials provided"), APIErrorCode.AUTH_FAILED),
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(Exception("Connection refused"), APIErrorCode.NETWORK_ERROR),
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(TimeoutError("read timeout"), APIErrorCode.NETWORK_ERROR),
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(Exception("Not available in your region"), APIErrorCode.GEOFENCE),
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(Exception("Title not found"), APIErrorCode.NOT_FOUND),
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(Exception("HTTP 429 too many requests"), APIErrorCode.RATE_LIMITED),
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(Exception("DRM license fetch failed"), APIErrorCode.DRM_ERROR),
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(Exception("503 service unavailable"), APIErrorCode.SERVICE_UNAVAILABLE),
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(ValueError("malformed body"), APIErrorCode.INVALID_INPUT),
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(RuntimeError("totally novel failure xyz"), APIErrorCode.INTERNAL_ERROR),
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],
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)
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def test_categorize_exception(exc: Exception, expected_code: APIErrorCode) -> None:
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api_err = categorize_exception(exc, context={"service": "ATV"})
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assert api_err.error_code == expected_code
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assert api_err.details.get("service") == "ATV"
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def test_categorize_preserves_context() -> None:
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api_err = categorize_exception(ValueError("bad"), context={"op": "search"})
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assert api_err.details["op"] == "search"
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def test_handle_api_exception_with_api_error_preserves_code() -> None:
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err = APIError(APIErrorCode.TRACK_NOT_FOUND, "no track")
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resp = handle_api_exception(err)
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body = _body(resp)
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assert body["error_code"] == "TRACK_NOT_FOUND"
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assert resp.status == 404
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def test_handle_api_exception_categorizes_generic() -> None:
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resp = handle_api_exception(ConnectionError("oops"))
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body = _body(resp)
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assert body["error_code"] == "NETWORK_ERROR"
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# --- Error contract harness (PRD 05 gate) ---------------------------------
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# Locks the FULL observable response — (http status, error_code, retryable) — that
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# a client sees for a generic (non-APIError) exception flowing through the
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# handle_api_exception funnel that every route's `except Exception` path calls.
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# This is the equivalence reference: after the categorize_exception collapse,
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# any tuple that changes here is a client-visible behaviour change, not a refactor.
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@pytest.mark.parametrize(
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"exc, status, code, retryable",
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[
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(Exception("Invalid credentials provided"), 401, "AUTH_FAILED", False),
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(Exception("Connection refused"), 503, "NETWORK_ERROR", True),
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(TimeoutError("read timeout"), 503, "NETWORK_ERROR", True),
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(Exception("Not available in your region"), 403, "GEOFENCE", False),
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(Exception("Title not found"), 404, "NOT_FOUND", False),
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(Exception("HTTP 429 too many requests"), 429, "RATE_LIMITED", True),
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(Exception("DRM license fetch failed"), 502, "DRM_ERROR", False),
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(Exception("503 service unavailable"), 503, "SERVICE_UNAVAILABLE", True),
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(ValueError("malformed body"), 400, "INVALID_INPUT", False),
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(RuntimeError("totally novel failure xyz"), 500, "INTERNAL_ERROR", False),
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],
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)
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def test_error_contract_generic_exception(exc: Exception, status: int, code: str, retryable: bool) -> None:
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resp = handle_api_exception(exc)
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assert resp.status == status
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body = _body(resp)
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assert body["error_code"] == code
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# retryable is only serialized when True (build_error_response omits it otherwise).
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assert body.get("retryable", False) is retryable
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def test_error_contract_apierror_passthrough_full_shape() -> None:
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# APIError carriers keep status + code + message + details + retryable verbatim.
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err = APIError(APIErrorCode.RATE_LIMITED, "slow down", details={"retry_after": 5}, retryable=True)
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resp = handle_api_exception(err)
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assert resp.status == 429
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body = _body(resp)
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assert body["error_code"] == "RATE_LIMITED"
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assert body["message"] == "slow down"
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assert body["details"] == {"retry_after": 5}
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assert body["retryable"] is True
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