import pytest

from arbitrade.detection.benchmark import run_incremental_detection_benchmark


def test_incremental_detection_benchmark_returns_metrics() -> None:
    result = run_incremental_detection_benchmark(iterations=500)

    assert result.iterations == 500
    assert result.total_ms > 0.0
    assert result.avg_ms > 0.0
    assert result.p50_ms > 0.0
    assert result.p95_ms > 0.0
    assert result.max_ms >= result.p95_ms


def test_incremental_detection_benchmark_rejects_invalid_iterations() -> None:
    with pytest.raises(ValueError, match="iterations"):
        run_incremental_detection_benchmark(iterations=0)