added test suite duration to result bar

@@ -1003,8 +1003,9 @@ Tester.prototype.renderResults = function renderResults(exit, status, save) {
             statusText = this.options.passText;
             style = 'GREEN_BAR';
         }
-        result = f('%s %s tests executed, %d passed, %d failed.',
-                   statusText, total, this.testResults.passed, this.testResults.failed);
+        result = f('%s %s tests executed in %ss, %d passed, %d failed.',
+                   statusText, total, utils.ms2seconds(this.calculateSuiteDuration()),
+                   this.testResults.passed, this.testResults.failed);
     }
     this.casper.echo(result, style, this.options.pad);
     if (this.testResults.failed > 0) {

@@ -495,6 +495,18 @@ function mergeObjects(origin, add) {
 exports.mergeObjects = mergeObjects;
 
 /**
+ * Converts milliseconds to seconds and rounds the results to 3 digits accuracy.
+ *
+ * @param  Number  milliseconds
+ * @return Number  seconds
+ */
+function ms2seconds(milliseconds) {
+    "use strict";
+    return Math.round(milliseconds / 1000 * 1000) / 1000;
+}
+exports.ms2seconds = ms2seconds;
+
+/**
  * Creates an (SG|X)ML node element.
  *
  * @param  String  name        The node name

@@ -34,17 +34,6 @@ var utils = require('utils');
 var fs = require('fs');
 
 /**
- * Returns duration in seconds, matching XUnit "standard".
- *
- * @param  Number  duration  Duration in milliseconds
- * @return String
- */
-function format_duration(duration) {
-    "use strict";
-    return (duration / 1000).toString();
-}
-
-/**
  * Generates a value for 'classname' attribute of the JUnit XML report.
  *
  * Uses the (relative) file name of the current casper script without file
@@ -112,7 +101,7 @@ XUnitExporter.prototype.addSuccess = function addSuccess(classname, name, durati
         name: name
     });
     if (duration !== undefined) {
-        snode.setAttribute('time', format_duration(duration));
+        snode.setAttribute('time', utils.ms2seconds(duration));
     }
     this._xml.appendChild(snode);
 };
@@ -133,7 +122,7 @@ XUnitExporter.prototype.addFailure = function addFailure(classname, name, messag
         name:      name
     });
     if (duration !== undefined) {
-        fnode.setAttribute('time', format_duration(duration));
+        fnode.setAttribute('time', utils.ms2seconds(duration));
     }
     var failure = utils.node('failure', {
         type: type || "unknown"
@@ -151,7 +140,7 @@ XUnitExporter.prototype.addFailure = function addFailure(classname, name, messag
 XUnitExporter.prototype.setSuiteDuration = function setSuiteDuration(duration) {
     "use strict";
     if (!isNaN(duration)) {
-        this._xml.setAttribute("time", format_duration(duration));
+        this._xml.setAttribute("time", utils.ms2seconds(duration));
     }
 };