kc3-lang/md4c/test/pathological_tests.py

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• Hash : b42e7f5c
  Author :
  Date : 2022-01-10T11:41:25
  

  md_resolve_links: Avoid link ref. def. lookup if... if we know that the bracket pair contains nested brackets. That makes the label invalid anyway, therefore we know that there is no link ref. def. to be found anyway. In case of heavily nested bracket pairs, the lookup could lead to quadratic parsing times. Fixes #172.

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• test/pathological_tests.py

• #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  import re
  import argparse
  import sys
  import platform
  from cmark import CMark
  from timeit import default_timer as timer
  
  if __name__ == "__main__":
      parser = argparse.ArgumentParser(description='Run cmark tests.')
      parser.add_argument('-p', '--program', dest='program', nargs='?', default=None,
              help='program to test')
      parser.add_argument('--library-dir', dest='library_dir', nargs='?',
              default=None, help='directory containing dynamic library')
      args = parser.parse_args(sys.argv[1:])
  
  cmark = CMark(prog=args.program, library_dir=args.library_dir)
  
  # list of pairs consisting of input and a regex that must match the output.
  pathological = {
      # note - some pythons have limit of 65535 for {num-matches} in re.
      "U+0000":
              ("abc\u0000de\u0000",
              re.compile("abc\ufffd?de\ufffd?")),
      "U+FEFF (Unicode BOM)":
              ("\ufefffoo",
              re.compile("<p>foo</p>")),
      "nested strong emph":
              (("*a **a " * 65000) + "b" + (" a** a*" * 65000),
              re.compile("(<em>a <strong>a ){65000}b( a</strong> a</em>){65000}")),
      "many emph closers with no openers":
              (("a_ " * 65000),
              re.compile("(a[_] ){64999}a_")),
      "many emph openers with no closers":
              (("_a " * 65000),
              re.compile("(_a ){64999}_a")),
      "many 3-emph openers with no closers":
              (("a***" * 65000),
              re.compile("(a<em><strong>a</strong></em>){32500}")),
      "many link closers with no openers":
              (("a]" * 65000),
              re.compile("(a\]){65000}")),
      "many link openers with no closers":
              (("[a" * 65000),
              re.compile("(\[a){65000}")),
      "mismatched openers and closers":
              (("*a_ " * 50000),
              re.compile("([*]a[_] ){49999}[*]a_")),
      "openers and closers multiple of 3":
              (("a**b" + ("c* " * 50000)),
              re.compile("a[*][*]b(c[*] ){49999}c[*]")),
      "link openers and emph closers":
              (("[ a_" * 50000),
              re.compile("(\[ a_){50000}")),
      "hard link/emph case":
              ("**x [a*b**c*](d)",
              re.compile("\\*\\*x <a href=\"d\">a<em>b\\*\\*c</em></a>")),
      "nested brackets":
              (("[" * 50000) + "a" + ("]" * 50000),
              re.compile("\[{50000}a\]{50000}")),
      "nested block quotes":
              ((("> " * 50000) + "a"),
              re.compile("(<blockquote>\r?\n){50000}")),
      "backticks":
              ("".join(map(lambda x: ("e" + "`" * x), range(1,1000))),
              re.compile("^<p>[e`]*</p>\r?\n$")),
      "many links":
              ("[t](/u) " * 50000,
              re.compile("(<a href=\"/u\">t</a> ?){50000}")),
      "many references":
              ("".join(map(lambda x: ("[" + str(x) + "]: u\n"), range(1,20000 * 16))) + "[0] " * 20000,
              re.compile("(\[0\] ){19999}")),
      "deeply nested lists":
              ("".join(map(lambda x: ("  " * x + "* a\n"), range(0,1000))),
              re.compile("<ul>\r?\n(<li>a<ul>\r?\n){999}<li>a</li>\r?\n</ul>\r?\n(</li>\r?\n</ul>\r?\n){999}")),
      "many html openers and closers":
              (("<>" * 50000),
              re.compile("(&lt;&gt;){50000}")),
      "many html proc. inst. openers":
              (("x" + "<?" * 50000),
              re.compile("x(&lt;\\?){50000}")),
      "many html CDATA openers":
              (("x" + "<![CDATA[" * 50000),
              re.compile("x(&lt;!\\[CDATA\\[){50000}")),
      "many backticks and escapes":
              (("\\``" * 50000),
              re.compile("(``){50000}")),
      "many broken link titles":
              (("[ (](" * 50000),
              re.compile("(\[ \(\]\(){50000}")),
      "broken thematic break":
              (("* " * 50000 + "a"),
              re.compile("<ul>\r?\n(<li><ul>\r?\n){49999}<li>a</li>\r?\n</ul>\r?\n(</li>\r?\n</ul>\r?\n){49999}")),
      "nested invalid link references":
              (("[" * 50000 + "]" * 50000 + "\n\n[a]: /b"),
              re.compile("\[{50000}\]{50000}"))
  }
  
  whitespace_re = re.compile('/s+/')
  passed = 0
  errored = 0
  failed = 0
  
  #print("Testing pathological cases:")
  for description in pathological:
      (inp, regex) = pathological[description]
      start = timer()
      [rc, actual, err] = cmark.to_html(inp)
      end = timer()
      if rc != 0:
          errored += 1
          print('{:35} [ERRORED (return code %d)]'.format(description, rc))
          print(err)
      elif regex.search(actual):
          print('{:35} [PASSED] {:.3f} secs'.format(description, end-start))
          passed += 1
      else:
          print('{:35} [FAILED]'.format(description))
          print(repr(actual))
          failed += 1
  
  print("%d passed, %d failed, %d errored" % (passed, failed, errored))
  if (failed == 0 and errored == 0):
      exit(0)
  else:
      exit(1)
  

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