code: def test_report_empty_fit(masker_class, input_parameters):
      """Test minimal report generation."""
      masker = masker_class(**input_parameters)
      masker.fit()
      _check_html(masker.generate_report())
  
imports: from collections import Counter
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from numpy.testing import assert_almost_equal
  from nilearn._utils.data_gen import generate_fake_fmri, generate_labeled_regions, generate_maps, generate_random_img
  from nilearn.image import get_data, new_img_like
  from nilearn.maskers import MultiNiftiLabelsMasker, MultiNiftiMapsMasker, MultiNiftiMasker, NiftiLabelsMasker, NiftiMapsMasker, NiftiMasker, NiftiSpheresMasker
label_desc: Use image node_id 6 for calling a global function with example usage: test_report_empty_fit(masker_class, input_parameters) without return types