escaping error message content prevents displaying images in results

[maliberty]

I'm new to Mocha but liking it so far. I wanted to port over js-imagediff (https://github.com/HumbleSoftware/js-imagediff) to Mocha as it only provides a jasmine interface currently. It nicely shows a graphical diff in its error output as can be seen at the example at http://humblesoftware.github.io/js-imagediff/test.html

The problem I've run into with mocha is that it html escapes the error messages preventing the embedding of images. This makes a port impossible. As far as I can see the issue lies in html.js

el.appendChild(fragment('

%e

', str));

where the %e invokes escaping on the message. Perhaps the framework could provide an option for the matcher to say the output shouldn't be escaped. I image a flag on the test.err could serve this purpose.

If this seems reasonable I'm willing to work on such a change.

[boneskull]

possible to catch the errors and unescape them?

[boneskull]

closing as old