Check for global variable leaks

test/less-test.js

@@ -5,6 +5,8 @@ var path = require('path'),
 var less = require('../lib/less');
 var stylize = require('../lib/less/lessc_helper').stylize;
 
+var globals = Object.keys(global);
+
 var oneTestOnly = process.argv[2];
 
 var totalTests = 0,
@@ -77,6 +79,12 @@ function globalReplacements(input, directory) {
             .replace(/\r\n/g, '\n');
 }
 
+function checkGlobalLeaks() {
+    return Object.keys(global).filter(function(v) {
+        return globals.indexOf(v) < 0;
+    });
+}
+
 function runTestSet(options, foldername, verifyFunction, nameModifier, doReplacements) {
     foldername = foldername || "";
 
@@ -147,6 +155,7 @@ function ok(msg) {
 }
 
 function endTest() {
+    var leaked = checkGlobalLeaks();
     if (failedTests + passedTests === totalTests) {
         sys.puts("");
         sys.puts("");
@@ -158,6 +167,12 @@ function endTest() {
             sys.print(stylize("All Passed ", "green"));
             sys.print(passedTests + " run");
         }
+        if (leaked.length > 0) {
+            sys.puts("");
+            sys.puts("");
+            sys.print(stylize("Global leak detected: ", "red") + leaked.join(', '));
+            sys.print("\n");
+        }
     }
 }
 
@@ -196,4 +211,4 @@ function testNoOptions() {
         return;
     }
     ok(stylize("OK\n", "green"));
-}
+}