code: def test_null_fragment():
      terms = frozenset(("bravo", "india"))
      sa = analysis.StandardAnalyzer()
      nf = highlight.WholeFragmenter()
      uc = highlight.UppercaseFormatter()
      htext = highlight.highlight(_doc, terms, sa, nf, uc)
      assert (
          htext
          == "alfa BRAVO charlie delta echo foxtrot golf hotel INDIA juliet kilo lima"
      )
  
imports: from __future__ import with_statement
  import pytest
  from whoosh import analysis, highlight, fields, qparser, query
  from whoosh.compat import u
  from whoosh.filedb.filestore import RamStorage
  from whoosh.util.testing import TempIndex
label_desc: Use image node_id 1 for calling a global function with example usage: test_null_fragment() without return types