docstr: Naive geometry get no tiles
docstr_tok: ["Naive","geometry","get","no","tiles"]
code: def test_no_crs(self):
      """Naive geometry get no tiles"""
      df = self.world.copy()
      df.crs = None
      m = df.explore()
      assert "openstreetmap" not in m.to_dict()["children"].keys()
  
imports: import geopandas
  import numpy
  import pandas
  import pytest
  import shapely
  from packaging.version import Version
  from matplotlib import cm
  from matplotlib import colors
  from branca.colormap import StepColormap
label_desc: Use image node_id 14 for calling the TestExplore obj's underlying member method code with example usage: obj.test_no_crs() without return types