def test_gridtiles(self): mb = ImageExporter() # At zoom level 0 grid = mb.grid_tiles((-180.0, -90.0, 180.0, 90.0), 0) self.assertEqual(grid, [[(0, 0)]]) # At zoom level 1 grid = mb.grid_tiles((-180.0, -90.0, 180.0, 90.0), 1) self.assertEqual(grid, [[(0, 0), (1, 0)], [(0, 1), (1, 1)]])