using last stable version when using compact config

Author: SaranshBS

lib/configParser.js

@@ -36,13 +36,17 @@ var ConfigParser = {
       return parseFloat(a) - parseFloat(b);
     });
     if (verStr === 'current' || verStr === 'latest') {
-      return filteredBrowsers[filteredBrowsers.length - 1];
+      return ConfigParser.checkIfLatestFlagApplicable(browserObject) ? 'latest' : filteredBrowsers[filteredBrowsers.length - 1];
     }
     else if (verStr === 'previous') {
-      return filteredBrowsers[filteredBrowsers.length - 2];
+      return ConfigParser.checkIfLatestFlagApplicable(browserObject) ? 'latest-1' : filteredBrowsers[filteredBrowsers.length - 2];
     }
   },
 
+  checkIfLatestFlagApplicable: function(browserObject) {
+    return !browserObject.mobile && ['chrome', 'firefox', 'edge'].includes(browserObject.browser)
+  },
+
   populateOsAndOsVersion: function(browserObject) {
     if (!(browserObject.os && browserObject.os_version)) {
       if (browserObject.mobile) {
@@ -56,13 +60,18 @@ var ConfigParser = {
       else {
 
         var windowsFiltered = ConfigParser.bsBrowsers.filter(function(currentValue) {
-          return currentValue.os === 'Windows' && currentValue.browser_version.match(/metro/i) == null && currentValue.browser === browserObject.browser && parseFloat(currentValue.browser_version).toPrecision(4) === parseFloat(browserObject.browser_version).toPrecision(4);
+          return currentValue.os === 'Windows' && currentValue.browser_version.match(/metro/i) == null && currentValue.browser === browserObject.browser && ((browserObject.browser_version && browserObject.browser_version.indexOf('latest') > -1) || parseFloat(currentValue.browser_version).toPrecision(4) === parseFloat(browserObject.browser_version).toPrecision(4));
         });
 
         var osxFiltered = ConfigParser.bsBrowsers.filter(function(currentValue) {
-          return currentValue.os === 'OS X' && currentValue.browser === browserObject.browser && parseFloat(currentValue.browser_version).toPrecision(4) === parseFloat(browserObject.browser_version).toPrecision(4);
+          return currentValue.os === 'OS X' && currentValue.browser === browserObject.browser && ((browserObject.browser_version && browserObject.browser_version.indexOf('latest')) > -1 || parseFloat(currentValue.browser_version).toPrecision(4) === parseFloat(browserObject.browser_version).toPrecision(4));
         });
-        browserObject = windowsFiltered.length > 0 ? windowsFiltered[Math.floor(Math.random() * windowsFiltered.length)] : osxFiltered[Math.floor(Math.random() * osxFiltered.length)];
+
+        let filteredObject = windowsFiltered.length > 0 ? windowsFiltered[Math.floor(Math.random() * windowsFiltered.length)] : osxFiltered[Math.floor(Math.random() * osxFiltered.length)];
+        if (browserObject.browser_version.indexOf('latest') > -1) {
+          filteredObject.browser_version = browserObject.browser_version
+        }
+        browserObject = filteredObject
       }
 
     }