React + Sizzle

react-queries.js

let sizzle = require('sizzle');
let React = require('react/addons');
let TestUtils = React.addons.TestUtils;

global.findAll = function (root, selector) {
  return TestUtils.findAllInRenderedTree(root, function (component) {
    let node = React.findDOMNode(component)
    return sizzle.matchesSelector(node, selector);
  });
};

global.find = function (root, selector) {
  let matches = findAll(root, selector);

  if (matches.length != 1) {
    throw Error(`Did not find exactly one match (found: ${matches.length}) for selector:${selector}`);
  }

  return matches[0];
}