code: def test_tile_layer():
      m = folium.Map([48.0, 5.0], zoom_start=6)
      layer = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
  
      folium.raster_layers.TileLayer(
          tiles=layer, name="OpenStreetMap", attr="attribution"
      ).add_to(m)
  
      folium.raster_layers.TileLayer(
          tiles=layer,
          name="OpenStreetMap2",
          attr="attribution2",
          overlay=True,
      ).add_to(m)
  
      folium.LayerControl().add_to(m)
      m._repr_html_()
  
      bounds = m.get_bounds()
      assert bounds == [[None, None], [None, None]], bounds
  
file_path: folium/tests/test_raster_layers.py
imports: import pytest
  import xyzservices
  from jinja2 import Template
  import folium
  from folium.utilities import normalize
label_desc: Use image node_id 1 for calling a global function with example usage: test_tile_layer() without return types