test.js

'use strict';

var packageName;  // there seems to be no official way of finding out the name of the very package we're testing - http://stackoverflow.com/questions/27180709/in-a-tinytest-test-file-how-do-i-get-the-name-of-the-package

// Check that the font files are downloadable. Meteor places assets at /packages/<packageName>/.

['eot', 'ttf', 'woff'].forEach(function (font) {
  Tinytest.addAsync(font + ' fonts are shipped', function (test, done) {

    // curiously enough, the 'local-test:...' package isn't loaded into Package before calling Tinytest, so we can't do this determination outside this loop
    if (!packageName)
      Object.keys(Package).forEach(function(p) {
        if (p.search(/local-test/) > -1)
          packageName = p.replace('local-test:', '');  // we should stop the loop, but forEach can't do that
      });

    var packagePath = packageName.replace(':', '_');  // e.g. webix_webix

    HTTP.get(
      '/packages/' + packagePath + '/webix/codebase/fonts/PTS-webfont.' + font,
      {
        headers: {
          'Cache-Control': 'no-cache'  // because Meteor has cached fonts even after they were removed from package.js (!) - https://github.com/meteor/meteor/issues/3196
        }
      },
      function callback(error, result) {
        if (error) {
          test.fail({message: 'Font failed to load'});
        } else {
          // if the file is 404, Meteor will redirect to / and return the Meteor.js boilerplate
          test.isTrue(result.content.length > 30000, font + ' font could not be downloaded');
        }

        done();
      }
    );
  });
});