Casper function to reload a page until a condition is met

reloadUntil.js

/**
 * Reload a page until a selector satisfies a condition
 * is changed to a different value.
 *
 * @param String    selector    The CSS selector we're looking at
 * @param Number    delay       How long to wait till we reload the page
 * @param Function  testFunc    A function to determine if we found what we're looking for
 *    @param String  result     The text found by the selector that is passed to the above function
 * @return Does not return anything
*/
function reloadUntil(selector, delay, testFunc) {
  casper.then(function() {
    this.reload(function() {
      var result = this.fetchText(selector);
      if(!testFunc(result)) {
        this.wait(delay, function() {
          reloadUntil(selector, delay, testFunc);
        });
      }
    });
  });
}

/*
 * Example use:
 */
casper.then(function(){
  reloadUntil('#foo', 2500, function(param){
    console.log(param);
    return (param > 50); //done when #foo is > than 50,
  });