unique_titles.js

var remark = require('remark');
var expect = require('expect');
var fs = require('fs');
var visit = require('unist-util-visit');
describe('json validity', () => {
  fs.readdirSync('./content').forEach(function(file) {
    it('valid ' + file, function() {
      var content = fs.readFileSync('./content/' + file, 'utf8');
      var ast = remark.parse(content);
      visit(ast, 'code', function(node) {
        if (node.lang === 'json') {
          expect(function() {
            JSON.parse(node.value);
          }).toNotThrow(null, 'a JSON code block at L:' +
            node.position.start.line + ' of ' + file + ' was invalid');
        }
      });
    });
  });
});