<%# Make sure you ONLY include this code in RAILS_ENV=test or cucumber %>
<%# Note: Selenium treats alert()s as kind of failed expectation. %>
<script type="text/javascript">
  window.cucumberOriginalAlert = window.alert;
  window.cucumberErrors = [];
  window.onerror = function() {
    var args = [];  // typical arguments are Message, File, Line#
    for (var i = 0; i < arguments.length; i++) {
      args.push(arguments[i]);
    }
    cucumberErrors.push(args.join(", "));
    if (!window.cucumberErrorReporter) {
      window.cucumberErrorReporter = setInterval(function() {
        // Wait for selenium to replace the alert function, or we'll cause a REAL alert (bad!)
        if (window.alert != window.cucumberOriginalAlert) {
          alert(cucumberErrors.join("\n"));
          clearInterval(window.cucumberErrorReporter);
        }
      }, 100);
    }
  };
</script>