code: def test_entities():
      example = "&amp;\n<html>\n&amp;"
      assert fix_text(example) == "&\n<html>\n&amp;"
      assert fix_text_segment(example) == "&amp;\n<html>\n&amp;"
  
      assert fix_text(example, unescape_html=True) == "&\n<html>\n&"
      assert (
          fix_text_segment(example, unescape_html=True)
          == "&\n<html>\n&"
      )
  
      assert (
          fix_text(example, unescape_html=False)
          == "&amp;\n<html>\n&amp;"
      )
      assert (
          fix_text_segment(example, unescape_html=False)
          == "&amp;\n<html>\n&amp;"
      )
  
      assert (
          fix_text_segment("&lt;&gt;", unescape_html=False)
          == "&lt;&gt;"
      )
      assert fix_text_segment("&lt;&gt;", unescape_html=True) == "<>"
      assert fix_text_segment("&lt;&gt;") == "<>"
      assert fix_text_segment("jednocze&sacute;nie") == "jednocześnie"
      assert fix_text_segment("JEDNOCZE&Sacute;NIE") == "JEDNOCZEŚNIE"
      assert (
          fix_text_segment("ellipsis&#133;", normalization="NFKC")
          == "ellipsis..."
      )
      assert (
          fix_text_segment("ellipsis&#x85;", normalization="NFKC")
          == "ellipsis..."
      )
      assert fix_text_segment("broken&#x81;") == "broken\x81"
      assert fix_text_segment("&amp;amp;amp;") == "&"
      assert unescape_html("euro &#x80;") == "euro €"
      assert unescape_html("EURO &EURO;") == "EURO €"
      assert (
          unescape_html("not an entity &#20x6;")
          == "not an entity &#20x6;"
      )
      assert unescape_html("JEDNOCZE&SACUTE;NIE") == "JEDNOCZEŚNIE"
      assert unescape_html("V&SCARON;ICHNI") == "VŠICHNI"
      assert unescape_html("&#xffff;") == ""
      assert unescape_html("&#xffffffff;") == "\ufffd"
      assert (
          fix_text_segment("this is just informal english &not html")
          == "this is just informal english &not html"
      )
  
imports: from ftfy import fix_text, fix_text_segment
  from ftfy.fixes import unescape_html
  import pytest
label_desc: Use image node_id 1 for calling a global function with example usage: test_entities() without return types