cmark

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -26,6 +26,10 @@ add_test(spectest_library
    python "${CMAKE_SOURCE_DIR}/runtests.py" "--no-normalize" "--spec"
    "${CMAKE_SOURCE_DIR}/spec.txt" "--library-dir" "${CMAKE_BINARY_DIR}/src"
 )
+add_test(pathological_tests_library
+   python "${CMAKE_SOURCE_DIR}/pathological_tests.py"
+   "--library-dir" "${CMAKE_BINARY_DIR}/src"
+)
 add_test(NAME api_test COMMAND api_test)
 if (WIN32)
   file(TO_NATIVE_PATH ${CMAKE_BINARY_DIR}/src WIN_DLL_DIR)

diff --git a/pathological_tests.py b/pathological_tests.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from ctypes import CDLL, c_char_p, c_long
+from subprocess import *
+import re
+import argparse
+import sys
+import platform
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='Run cmark tests.')
+    parser.add_argument('--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:])
+
+if not args.program:
+    sysname = platform.system()
+    libname = "libcmark"
+    if sysname == 'Darwin':
+        libname += ".dylib"
+    elif sysname == 'Windows':
+        libname += ".dll"
+    else:
+        libname += ".so"
+    if args and args.library_dir:
+        libpath = args.library_dir + "/" + libname
+    else:
+        libpath = "build/src/" + libname
+    cmark = CDLL(libpath)
+
+    markdown = cmark.cmark_markdown_to_html
+    markdown.restype = c_char_p
+    markdown.argtypes = [c_char_p, c_long]
+
+def md2html(text, prog):
+    if prog:
+        p1 = Popen(prog.split(), stdout=PIPE, stdin=PIPE, stderr=PIPE)
+        [result, err] = p1.communicate(input=text)
+        return [p1.returncode, result, err]
+    else:
+        return [0, markdown(text, len(text)), '']
+
+pathological = {
+    "nested strong emph":
+                (("*a **a " * 100000) + "b" + (" a** a*" * 100000),
+                 "<p>" + ("<em>a <strong>a " * 100000) + "b" +
+                   (" a</strong> a</em>" * 100000) + "</p>"),
+    "nested brackets":
+                 (("[" * 50000) + "a" + ("]" * 50000),
+                  "<p>" + ("[" * 50000) + "a" + ("]" * 50000) + "</p>")
+    }
+
+whitespace_re = re.compile('/s+/')
+passed = 0
+errored = 0
+failed = 0
+
+print "Testing pathological cases:"
+for description in pathological:
+    print description
+    (inp, expected) = pathological[description]
+    [rc, actual, err] = md2html(inp, args.program)
+    if rc != 0:
+        errored += 1
+        print description
+        print "program returned error code %d" % rc
+        print(err)
+    elif whitespace_re.sub(' ', actual.rstrip()) == expected.rstrip():
+        passed += 1
+    else:
+        print description, 'failed'
+        print(actual)
+        failed += 1
+
+print "%d passed, %d failed, %d errored" % (passed, failed, errored)
+if (failed == 0 and errored == 0):
+    exit(0)
+else:
+    exit(1)