code: def test_load_earth():
      mesh = pv.examples.planets.load_earth()
      assert isinstance(mesh, pv.PolyData)
      assert mesh.n_cells
  
file_path: pyvista/tests/examples/test_examples.py
imports: import numpy
  import pytest
  import pyvista
  from pyvista import examples
label_desc: Use image node_id 10 for calling a global function with example usage: test_load_earth() without return types