#!/usr/bin/env python3
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"""Unit test script, to check cantools behavior regarding overlapping signals."""

import unittest
from pathlib import Path

import cantools
from cantools.database import load_file

SCRIPT_DIR = Path(__file__).parent.resolve()


class OverlappingSignals(unittest.TestCase):
    """Derived test case"""

    def test_overlapping_signals(self):
        """check that cantools raises an error if signals are overlapping in a
        message"""
        self.assertRaises(
            cantools.database.errors.Error,
            load_file,
            SCRIPT_DIR / "overlapping-signals.dbc",
        )


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