import sys, os
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..")))
from comparator.rounding_detect import detect_rounding, RoundingResult


def test_truncation_detected():
    r = detect_rounding("1500000", "1499999")
    assert r.mode in ("TRUNCATE", "HALF_UP")


def test_exact_match():
    r = detect_rounding("1500000", "1500000")
    assert r.mode == "EXACT"
    assert r.confidence == 1.0


def test_low_confidence_small_diff():
    r = detect_rounding("1500", "1498")
    assert r.confidence < 1.0


def test_suggestion_generated():
    r = detect_rounding("1500000", "1499999")
    assert len(r.suggestion) > 0