Package-ify Dromaeo and browser controller functionality

samples/third_party/dromaeo/htmlrunner.js

-// An version of Dromaeo's original htmlrunner adapted for the
-// Dart-based test driver.
-
-var _operations = [];
-var _N_RUNS = 5;
-var _nRanTests = 0;
-var _nTests = 0;
-var _T_DISTRIBUTION = 2.776;
-
-function startTest() {
-  window.addEventListener(
-      'message',
-      function (event) {
-        if (event.data == 'start') {
-          _run();
-        } else {
-          window.alert('Unknown command: ' + event.data);
-        }
-      },
-      false);
-}
-
-function _run() {
-  var currentOperation = 0;
-  function handler() {
-    if (currentOperation < _operations.length) {
-      _operations[currentOperation]();
-      currentOperation++;
-      window.setTimeout(handler, 1);
-    } else {
-      _postMessage('over');
-    }
-  }
-  window.setTimeout(handler, 0);
-}
-
-function _postMessage(command, data) {
-  var payload = { 'command': command };
-  if (data) {
-    payload['data'] = data;
-  }
-  window.parent.postMessage(JSON.stringify(payload), '*');
-}
-
-function test(name, fn) {
-  _nTests++;
-  _operations.push(function () {
-      // List of number of runs in seconds.
-      var runsPerSecond = [];
-      // Run the test several times.
-      try {
-        // TODO(antonm): use .setTimeout to schedule next run as JS
-        // version does.  That allows to report the intermediate results
-        // more smoothly as well.
-        for (var i = 0; i < _N_RUNS; i++) {
-          var runs = 0;
-          var start = Date.now();
-
-          var cur = Date.now();
-          while ((cur - start) < 1000) {
-            fn();
-            cur = Date.now();
-            runs++;
-          }
-
-          runsPerSecond.push((runs * 1000.0) / (cur - start));
-        }
-      } catch(e) {
-        window.alert('Exception : ' + e);
-        return;
-      }
-      _reportTestResults(name, runsPerSecond);
-    });
-}
-
-// Adapted from Dromaeo's webrunner.
-function _compute(times){
-  var results = {runs: times.length}, num = times.length;
-
-  times = times.sort(function(a,b){
-      return a - b;
-    });
-
-  // Make Sum
-  results.sum = 0;
-
-  for ( var i = 0; i < num; i++ )
-    results.sum += times[i];
-
-  // Make Min
-  results.min = times[0];
-
-  // Make Max
-  results.max = times[ num - 1 ];
-
-  // Make Mean
-  results.mean = results.sum / num;
-
-  // Make Median
-  results.median = num % 2 == 0 ?
-      (times[Math.floor(num/2)] + times[Math.ceil(num/2)]) / 2 :
-      times[Math.round(num/2)];
-
-  // Make Variance
-  results.variance = 0;
-
-  for ( var i = 0; i < num; i++ )
-    results.variance += Math.pow(times[i] - results.mean, 2);
-
-  results.variance /= num - 1;
-
-  // Make Standard Deviation
-  results.deviation = Math.sqrt( results.variance );
-
-  // Compute Standard Errors Mean
-  results.sem = (results.deviation / Math.sqrt(results.runs)) * _T_DISTRIBUTION;
-
-  // Error
-  results.error = ((results.sem / results.mean) * 100) || 0;
-
-  return results;
-}
-
-function _reportTestResults(name, times) {
-  _nRanTests++;
-  var results = _compute(times);
-
-  _postMessage('result', {
-      'testName': name,
-      'mean': results.mean,
-      'error': results.error,
-      'percent': (100.0 * _nRanTests / _nTests)
-          });
-}
-
-function endTest() {
-  _postMessage('inited', { 'nTests': _nTests });
-}
-
-function prep(fn) {
-  _operations.push(fn);
-}