code: def test_escape_silent():
      assert escape_silent(None) == Markup()
      assert escape(None) == Markup(None)
      assert escape_silent("<foo>") == Markup("&lt;foo&gt;")
  
imports: import pytest
  from markupsafe import escape
  from markupsafe import escape_silent
  from markupsafe import Markup
  from markupsafe._compat import PY2
  from markupsafe._compat import text_type
label_desc: Use image node_id 15 for calling a global function with example usage: test_escape_silent() without return types