0.4.1 is out, with array methods proxied for wrapped objects, an _.breakLoop(), and an _.isEmpty()

test/chaining.js

@@ -1,7 +1,7 @@
 $(document).ready(function() {
-  
+
   module("Underscore chaining.");
-    
+
   test("chaining: map/flatten/reduce", function() {
     var lyrics = [
       "I'm a lumberjack and I'm okay",
@@ -12,14 +12,14 @@ $(document).ready(function() {
     var counts = _(lyrics).chain()
       .map(function(line) { return line.split(''); })
       .flatten()
-      .reduce({}, function(hash, l) { 
+      .reduce({}, function(hash, l) {
         hash[l] = hash[l] || 0;
         hash[l]++;
         return hash;
     }).get();
     ok(counts['a'] == 16 && counts['e'] == 10, 'counted all the letters in the song');
   });
-  
+
   test("chaining: select/reject/sortBy", function() {
     var numbers = [1,2,3,4,5,6,7,8,9,10];
     numbers = _(numbers).chain().select(function(n) {
@@ -31,5 +31,17 @@ $(document).ready(function() {
     }).get();
     equals(numbers.join(', '), "10, 6, 2", "filtered and reversed the numbers");
   });
-  
+
+  test("chaining: reverse/concat/unshift/pop/map", function() {
+    var numbers = [1,2,3,4,5];
+    numbers = _(numbers).chain()
+      .reverse()
+      .concat([5, 5, 5])
+      .unshift(17)
+      .pop()
+      .map(function(n){ return n * 2; })
+      .get();
+    equals(numbers.join(', '), "34, 10, 8, 6, 4, 2, 10, 10", 'can chain together array functions.');
+  });
+
 });