querystring: fix maxKeys = 0 is ignored

lib/querystring.js

@@ -164,7 +164,12 @@ QueryString.parse = QueryString.decode = function(qs, sep, eq, options) {
   sep = sep || '&';
   eq = eq || '=';
   var obj = {},
-      maxKeys = options && options.maxKeys || 1000;
+      maxKeys = 1000;
+
+  // Handle maxKeys = 0 case
+  if (options && typeof options.maxKeys === 'number') {
+    maxKeys = options.maxKeys;
+  }
 
   if (typeof qs !== 'string' || qs.length === 0) {
     return obj;

test/simple/test-querystring.js

@@ -189,6 +189,22 @@ assert.equal(
   1
 );
 
+// Test removing limit
+function testUnlimitedKeys() {
+  var query = {},
+      url;
+
+  for (var i = 0; i < 2000; i++) query[i] = i;
+
+  url = qs.stringify(query);
+
+  assert.equal(
+    Object.keys(qs.parse(url, null, null, { maxKeys: 0 })).length,
+    2000
+  );
+}
+testUnlimitedKeys();
+
 
 var b = qs.unescapeBuffer('%d3%f2Ug%1f6v%24%5e%98%cb' +
                           '%0d%ac%a2%2f%9d%eb%d8%a2%e6');