import unittest
from map_manager.utils import get_hgt_tile_geographic_bounds, calculate_meters_per_pixel


class TestUtils(unittest.TestCase):
    def test_hgt_tile_bounds(self):
        # N45E007 -> west=7, south=45, east=8, north=46
        bbox = get_hgt_tile_geographic_bounds(45, 7)
        self.assertEqual(bbox, (7.0, 45.0, 8.0, 46.0))

    def test_meters_per_pixel(self):
        mpp = calculate_meters_per_pixel(45.0, 10, tile_pixel_size=256)
        self.assertIsNotNone(mpp)
        self.assertGreater(mpp, 0)


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