from core.domain.errors import (
    CDRProcessingError,
    FailureReason,
)
from core.worker.dlq import build_dlq_envelope


def test_build_dlq_envelope() -> None:
    original = {
        "raw_id": "raw-invalid-001",
        "rat": 99,
    }

    error = CDRProcessingError(
        reason=FailureReason.INVALID_RAT_VALUE,
        detail="Unsupported RAT value: 99.",
        failed_field="rat",
    )

    envelope = build_dlq_envelope(
        original_payload=original,
        error=error,
        worker_instance="worker-test",
    )

    assert envelope["original_payload"] == original

    assert (
        envelope["failure_reason"]
        == "invalid_rat_value"
    )

    assert envelope["failed_field"] == "rat"
    assert envelope["worker_instance"] == "worker-test"

    assert envelope["failed_at"].endswith("Z")