import tempfile
import unittest
from pathlib import Path
from lean_bench.cli import load_tasks
class Tests(unittest.TestCase):
    def test_duplicate(self):
        with tempfile.TemporaryDirectory() as directory:
            path = Path(directory)/'data.jsonl'
            path.write_text('{"id":"x","statement":"True"}\n' * 2)
            with self.assertRaises(ValueError): load_tasks(path)
if __name__ == '__main__': unittest.main()