code: def test_rsphere_eqavol():
      assert rsphere.eqavol() == approx(6371000.8049)
  
file_path: pymap3d/src/pymap3d/tests/test_rsphere.py
imports: import pymap3d
  import pymap3d.rcurve
  import pymap3d.rsphere
  import pytest
  from pytest import approx
label_desc: Use image node_id 3 for calling a global function with example usage: test_rsphere_eqavol() without return types