"""src/vkgs/src/render_graph.cpp 의 정렬·배리어 로직을 g++ 로 컴파일해 시험한다. GPU·창 없음
(vkCmdPipelineBarrier 는 시험 쪽 가짜가 기록한다)."""

import os
import shutil
import subprocess
from pathlib import Path

import pytest

ROOT = Path(__file__).resolve().parents[1]
# 뷰어 빌드와 같은 컴파일러 (conda gcc 12, $CXX). 시스템 g++ 9 는 C++20 을 모른다
CXX = os.environ.get("CXX") or "g++"


@pytest.mark.skipif(shutil.which(CXX) is None, reason="g++ 없음")
def test_render_graph(tmp_path):
    exe = tmp_path / "t"
    inc = [str(ROOT / "src/vkgs/src"), str(ROOT / "third_party")]
    if os.environ.get("CONDA_PREFIX"):
        inc.append(os.environ["CONDA_PREFIX"] + "/include")
    subprocess.run([CXX, "-std=c++20", "-O1", *(f"-I{d}" for d in inc),
                    str(ROOT / "tests/cpp/test_render_graph.cpp"), str(ROOT / "src/vkgs/src/render_graph.cpp"),
                    "-o", str(exe)], check=True)
    r = subprocess.run([str(exe), str(ROOT / "configs/render_graph.json")], capture_output=True, text=True)
    assert r.returncode == 0, r.stdout + r.stderr