discourse/test/javascripts/mdtest/mdtest.js.erb

module("MDTest", {
  setup: function() {
    Discourse.SiteSettings.traditional_markdown_linebreaks = false;
  }
});

// This is cheating, but the trivial differences between sanitization
// do not affect formatting.
function normalize(str) {
  return str.replace(/\n\s*/g, '').
             replace(/ \/\>/g, '>').
             replace(/    ?/g, "\t").
             replace(/"/g, '"');
}

// We use a custom sanitizer for MD test that hoists out comments. In Discourse
// they are stripped, but to be compliant with the spec they should not be.
function hoistingSanitizer(result) {
  var hoisted,
      m = result.match(/<!--[\s\S]*?-->/g);
  if (m && m.length) {
    hoisted = [];
    for (var i=0; i<m.length; i++) {
      var c = m[i],
          id = md5("discourse:hoisted-comment:" + i);
      result = result.replace(c, id);
      hoisted.push([c, id]);
    }
  }

  result = Discourse.Markdown.sanitize(result);

  if (hoisted) {
    hoisted.forEach(function(tuple) {
      result = result.replace(tuple[1], tuple[0]);
    });
  }

  return result;
}

var md = function(input, expected, text) {
  var result = Discourse.Markdown.cook(input, {
        sanitizerFunction: hoistingSanitizer,
        traditional_markdown_linebreaks: true
      }),
      resultNorm = normalize(result),
      expectedNorm = normalize(expected),
      same = (result === expected) || (resultNorm === expectedNorm);

  if (same) {
    ok(same, text);
  } else {
    console.log(resultNorm);
    console.log(expectedNorm);
    equal(resultNorm, expectedNorm, text);
  }
};

test("first", function(){
  equal(1, 1, "cool")
});

<%
  def mdtest_suite
    result = ""
    Dir.glob("#{Rails.root}/test/javascripts/mdtest/fixtures/*.text").each do |f|

      filename_no_ext = f.sub(/\.text$/, '')
      filename = Pathname.new(filename_no_ext)

      text = File.read(f)
      html = File.read("#{filename_no_ext}.xhtml");
      result << "test(\"#{filename}\", function() { md(#{text.to_json}, #{html.to_json}, 'passes MDTest'); });\n"
    end
    result
  end
%>

<%= mdtest_suite %>