fix(client): don't crash if receive array-like results

fixes #2061

client/karma.js

@@ -118,17 +118,32 @@ var Karma = function (socket, iframe, opener, navigator, location) {
  return false
  }
 
- this.result = function (result) {
+ this.result = function (originalResult) {
+ var convertedResult = {}
+
+ // Convert all array-like objects to real arrays.
+ for (var propertyName in originalResult) {
+ if (originalResult.hasOwnProperty(propertyName)) {
+ var propertyValue = originalResult[propertyName]
+
+ if (Object.prototype.toString.call(propertyValue) === '[object Array]') {
+ convertedResult[propertyName] = Array.prototype.slice.call(propertyValue)
+ } else {
+ convertedResult[propertyName] = propertyValue
+ }
+ }
+ }
+
  if (!startEmitted) {
  socket.emit('start', {total: null})
  startEmitted = true
  }
 
  if (resultsBufferLimit === 1) {
- return socket.emit('result', result)
+ return socket.emit('result', convertedResult)
  }
 
- resultsBuffer.push(result)
+ resultsBuffer.push(convertedResult)
 
  if (resultsBuffer.length === resultsBufferLimit) {
  socket.emit('result', resultsBuffer)