code: def test_plot_img_on_surf_title(img_3d_mni):
      title = "Title"
      fig, _ = plot_img_on_surf(
          img_3d_mni, hemispheres=["right"], views=["lateral"]
      )
      assert fig._suptitle is None, "Created title without title kwarg."
      fig, _ = plot_img_on_surf(
          img_3d_mni,
          hemispheres=["right"],
          views=["lateral"],
          title=title,
      )
      assert fig._suptitle is not None, "Title not created."
      assert (
          fig._suptitle.get_text() == title
      ), "Title text not assigned."
  
imports: import re
  import tempfile
  import unittest.mock
  import matplotlib.pyplot
  import numpy
  import pytest
  from matplotlib.figure import Figure
  from numpy.testing import assert_array_equal
  from nilearn._utils.helpers import is_kaleido_installed, is_plotly_installed
  from nilearn.conftest import _rng
  from nilearn.datasets import fetch_surf_fsaverage
  from nilearn.plotting.displays import PlotlySurfaceFigure
  from nilearn.plotting.surf_plotting import VALID_HEMISPHERES, VALID_VIEWS, _compute_facecolors_matplotlib, _get_ticks_matplotlib, _get_view_plot_surf_matplotlib, _get_view_plot_surf_plotly, plot_img_on_surf, plot_surf, plot_surf_contours, plot_surf_roi, plot_surf_stat_map
  from nilearn.surface import load_surf_data, load_surf_mesh
  from nilearn.surface.tests._testing import generate_surf
label_desc: Use image node_id 39 for calling a global function with example usage: test_plot_img_on_surf_title(img_3d_mni) without return types