Pull an HTML file into a TinyTest

TinyTest seems to be concerned only with unit testing; however, may Meteor packages have UI elements, and it would be helpful to pull in a pre-crafted HTML file that exercises a widget. For instance, we might want to transform a <table> into a grid with DataTables.net, then test if the instantiation was correct.

How can external HTML files be used in a TinyTest?

package.js:

Package.onTest(function (api) {
  api.use(packageName, where);
  api.use(['tinytest', 'http'], where);

  // TODO we should just bring in src/test.html - but how to do that with TinyTest?
  api.addFiles('src/test.html', where);  // this won't magically display the HTML anywhere
  api.addFiles('meteor/test.js', where);
});

test.js:

Tinytest.addAsync('Visual check', function (test, done) {
  var iconsDropZone = document.createElement('div');
  document.body.appendChild(iconsDropZone);


  // TODO ideally we'd get src/test.html straight from this repo, but no idea how to do this from TinyTest
  HTTP.get('https://rawgit.com/FortAwesome/Font-Awesome/master/src/test.html', function callback(error, result) {
    if (error) {
      test.fail('Error getting the icons. Do we have an Internet connection to rawgit.com?');
    } else {
      iconsDropZone.innerHTML = result.content;
      test.ok({message: 'Test passed if the icons look OK.'});
    }

    done();
  });

});