Fix populate script

edx changed the behaviour of auto_auth:
- duplicate username will cause error
- response is in json format instead of text

scripts/populate.js

@@ -32,11 +32,14 @@ var config = require('./populate.json');
 
 api.baseUrls = config.baseUrls;
 
+var timestamp = new Date();
+var timestamp_str = timestamp.getFullYear() + ("0" + (timestamp.getMonth() + 1)).slice(-2) + ("0" + timestamp.getDate()).slice(-2) + ("0" + timestamp.getHours()).slice(-2) + ("0" + timestamp.getMinutes()).slice(-2) + ("0" + timestamp.getSeconds()).slice(-2);
+
 async.timesSeries(config.answers.length, function(i, next) {
     async.timesSeries(config.xblock_keys.length, function(j, nextx) {
         async.series([
             function (cb) {
-                api.createUserOrLogin('pitestuser'+i, 'lms', config.course_key, cb);
+                api.createUserOrLogin('pitestuser_'+timestamp_str+'_'+i, 'lms', config.course_key, cb);
             },
             function (cb) {
                 api.piSubmitAnswer(config.course_key, config.xblock_prefix + config.xblock_keys[j], {

ubcpi/static/js/features/support/api.js

@@ -62,14 +62,14 @@ Api.prototype.createUserOrLogin = function (username, target, course_id, callbac
             });
 
             // parse the response
-            var userInfo = body.match(/Logged in user (.+) \((.+)\) with password (.+) and user_id (.+)/);
+            var userInfo = JSON.parse(body)
             self.users[target] = {
-                username: userInfo[1],
-                email: userInfo[2],
-                password: userInfo[3],
-                id: userInfo[4]
+                username: userInfo['username'],
+                email: userInfo['email'],
+                password: userInfo['password'],
+                id: userInfo['user_id']
             };
-            //console.log(target + ': ' + body);
+            // console.log(self.users[target])
             callback(null, self.users[target]);
         }
     );