"""Unit tests for retry_on_exception decorator."""

import pytest
from werkzeug.exceptions import Conflict

from ledger.utils.retry import retry_on_exception


def test_does_not_retry_http_exception():
    """HTTPExceptions propagate immediately without retry."""
    call_count = 0

    @retry_on_exception(retries=3)
    def failing_fn():
        nonlocal call_count
        call_count += 1
        raise Conflict('duplicate')

    with pytest.raises(Conflict):
        failing_fn()

    assert call_count == 1


def test_retries_generic_exception():
    """Generic exceptions are retried up to max attempts."""
    call_count = 0

    @retry_on_exception(retries=3, delay_secs=0)
    def failing_fn():
        nonlocal call_count
        call_count += 1
        raise RuntimeError('transient')

    with pytest.raises(RuntimeError):
        failing_fn()

    assert call_count == 3