"""Golden tests for STRONG_CLOSE_SIGNAL_V1 (governance/todo/technical_signals_p4_adoption_plan.yaml P4-2)."""
from __future__ import annotations

import importlib.util
from pathlib import Path

ROOT = Path(__file__).resolve().parents[3]
MODULE_PATH = ROOT / "tools" / "build_strong_close_signal_v1.py"


def _load_module():
    spec = importlib.util.spec_from_file_location("build_strong_close_signal_v1", MODULE_PATH)
    module = importlib.util.module_from_spec(spec)
    assert spec.loader is not None
    spec.loader.exec_module(module)
    return module


def test_close_near_high_is_strong_close() -> None:
    mod = _load_module()
    result = mod.evaluate_strong_close(99, 100, 90)
    assert result["strong_close"] is True
    assert result["close_position_pct"] == 90.0


def test_close_near_low_is_not_strong_close() -> None:
    mod = _load_module()
    result = mod.evaluate_strong_close(91, 100, 90)
    assert result["strong_close"] is False


def test_degenerate_high_equals_low_returns_null() -> None:
    mod = _load_module()
    result = mod.evaluate_strong_close(100, 100, 100)
    assert result["strong_close"] is None
    assert result["close_position_pct"] is None