code: def test_mapper_init(mapper):
      assert isinstance(mapper, PointGaussianMapper)
      assert "False" in repr(mapper)
      assert "Emissive" in repr(mapper)
  
file_path: pyvista/tests/plotting/mappers/test_gaussian_mapper.py
imports: import pytest
  import pyvista
  from pyvista.plotting.mapper import PointGaussianMapper
label_desc: Use image node_id 2 for calling a global function with example usage: test_mapper_init(mapper) without return types