from unittest.mock import MagicMock, patch
from slo_tracker import evaluate_slo


def make_prom(value):
    prom = MagicMock()
    prom.custom_query.return_value = [{"value": [0, str(value)]}]
    return prom


def test_slo_ok():
    slo = {"name": "test", "query": "up", "target": 0.99}
    result = evaluate_slo(make_prom(0.999), slo, "7d")
    assert result["ok"] is True


def test_slo_burning():
    slo = {"name": "test", "query": "up", "target": 0.99}
    result = evaluate_slo(make_prom(0.985), slo, "7d")
    assert result["ok"] is False