from __future__ import annotations

import sys
import tempfile
import unittest
from pathlib import Path

import laspy

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
from apply_pointcloud_semantic_model import load_cloud  # noqa: E402


class ApplyPointCloudSemanticModelTests(unittest.TestCase):
    def test_empty_las_reports_a_clear_input_error(self) -> None:
        with tempfile.TemporaryDirectory() as directory:
            source = Path(directory) / "empty.las"
            laspy.LasData(laspy.LasHeader(point_format=3, version="1.2")).write(source)

            with self.assertRaisesRegex(ValueError, "没有可读取的点"):
                load_cloud(source)


if __name__ == "__main__":
    unittest.main()