new_contents: import pytest
  
  import helpers
  import meshio
  
  
  @pytest.mark.parametrize(
      "mesh",
      [
          helpers.tri_mesh,
          helpers.quad_mesh,
          helpers.tri_quad_mesh,
          helpers.tet_mesh,
          helpers.hex_mesh,
      ],
  )
  @pytest.mark.parametrize(
      "accuracy,ext",
      [
          (1.0e-7, ".ugrid"),
          (1.0e-15, ".b8.ugrid"),
          (1.0e-7, ".b4.ugrid"),
          (1.0e-15, ".lb8.ugrid"),
          (1.0e-7, ".lb4.ugrid"),
          (1.0e-15, ".r8.ugrid"),
          (1.0e-7, ".r4.ugrid"),
          (1.0e-15, ".lr8.ugrid"),
          (1.0e-7, ".lr4.ugrid"),
      ],
  )
  def test_io(mesh, accuracy, ext):
      helpers.write_read(meshio.ugrid.write, meshio.ugrid.read, mesh, accuracy, ext)
  
  
  # def test_generic_io():
  #    helpers.generic_io("test.mesh")
  #    # With additional, insignificant suffix:
  #    helpers.generic_io("test.0.mesh")
  
subject: add initial ugrid test