Port pathological tests from cmark

test/pathological.js

@@ -0,0 +1,137 @@
+// Ported from cmark, https://github.com/commonmark/cmark/blob/master/test/pathological_tests.py
+//
+
+'use strict';
+
+
+var assert     = require('chai').assert;
+var markdownit = require('../');
+
+
+describe('Pathological', function () {
+
+  var md;
+
+  before(function () {
+    md = markdownit({ maxNesting: 100 });
+  });
+
+  it('nested strong emph', function () {
+    assert.match(
+      md.render('*a **a '.repeat(65000) + 'b' + ' a** a*'.repeat(65000)),
+      /(<em>a <strong>a ){65000}b( a<\/strong> a<\/em>){65000}/
+    );
+  });
+
+  it('many emph closers with no openers', function () {
+    assert.match(
+      md.render('a_ '.repeat(65000)),
+      /(a[_] ){64999}a_/
+    );
+  });
+
+  it('many emph openers with no closers', function () {
+    assert.match(
+      md.render('_a '.repeat(65000)),
+      /(_a ){64999}_a/
+    );
+  });
+
+  it('many link closers with no openers', function () {
+    assert.match(
+      md.render('a]'.repeat(65000)),
+      /(a\]){65000}/
+    );
+  });
+
+  it('many link openers with no closers', function () {
+    assert.match(
+      md.render('[a'.repeat(65000)),
+      /(\[a){65000}/
+    );
+  });
+
+  it('mismatched openers and closers', function () {
+    assert.match(
+      md.render('*a_ '.repeat(50000)),
+      /([*]a[_] ){49999}[*]a_/
+    );
+  });
+
+  it('openers and closers multiple of 3', function () {
+    assert.match(
+      md.render('a**b' + ('c* '.repeat(50000))),
+      /a[*][*]b(c[*] ){49999}c[*]/
+    );
+  });
+
+  it('link openers and emph closers', function () {
+    assert.match(
+      md.render('[ a_'.repeat(50000)),
+      /(\[ a_){50000}/
+    );
+  });
+
+  it.skip('pattern [ (]( repeated', function () {
+    assert.match(
+      md.render('[ (]('.repeat(80000)),
+      /(\[ \(\]\(){80000}/
+    );
+  });
+
+  it('hard link/emph case', function () {
+    assert.match(
+      md.render('**x [a*b**c*](d)'),
+      /\*\*x <a href="d">a<em>b\*\*c<\/em><\/a>/
+    );
+  });
+
+  it('nested brackets', function () {
+    assert.match(
+      md.render('['.repeat(50000) + 'a' + ']'.repeat(50000)),
+      /\[{50000}a\]{50000}/
+    );
+  });
+
+  it('nested block quotes', function () {
+    assert.match(
+      md.render('> '.repeat(50000) + 'a'),
+      /(<blockquote>\n){99}/ // limited by maxNesting
+    );
+  });
+
+  it('deeply nested lists', function () {
+    assert.match(
+      md.render(Array(1000).fill(0).map(function (_, x) { return '  '.repeat(x) + '* a\n'; }).join('')),
+      /<ul>\n(<li>a\n<ul>\n){49}<li><\/li>\n<\/ul>\n(<\/li>\n<\/ul>\n){49}/ // limited by maxNesting
+    );
+  });
+
+  it('U+0000 in input', function () {
+    assert.match(
+      md.render('abc\u0000de\u0000'),
+      /abc\ufffd?de\ufffd?/
+    );
+  });
+
+  it.skip('backticks', function () {
+    assert.match(
+      md.render(Array(50000).fill(0).map(function (_, x) { return 'e' + '`'.repeat(x); }).join('')),
+      /^<p>[e`]*<\/p>\n$/
+    );
+  });
+
+  it.skip('unclosed links A', function () {
+    assert.match(
+      md.render('[a](<b'.repeat(30000)),
+      /(\[a\]\(&lt;b){30000}/
+    );
+  });
+
+  it.skip('unclosed links B', function () {
+    assert.match(
+      md.render('[a](b'.repeat(30000)),
+      /(\[a\]\(b){30000}/
+    );
+  });
+});