kc3-lang/md4c/test/pathological_tests.py

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• Author : Martin Mitas
  Date : 2019-04-29 19:03:16
  Hash : d4d10915
  Message : Improve parsing of inline raw HTML. * Isolate some common code for scanning HTML closer into a new function so most HTML scanner functions reuse the same code. * Improve the scanning for the closer so that on failure we remember the range where no closer is present. So any later scanning attempts may fail early. Fixes #73.

• 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.
      "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}")),
      "U+0000 in input":
                   ("abc\u0000de\u0000",
                    re.compile("abc\ufffd?de\ufffd?")),
      "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}"))
      }
  
  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)