more tests, all pass

test/hash.js

@@ -2,7 +2,7 @@
 var sys = require('sys');
 var Hash = require('traverse/hash');
 
-exports['flat traversal with the hash lib'] = function (assert) {
+exports['hash traversal'] = function (assert) {
     var ref1 = { a : 1, b : 2 };
     var hash1 = Hash(ref1).map(function (v) { return v + 1 }).end;
     assert.equal(ref1.a, 1);
@@ -16,5 +16,19 @@ exports['flat traversal with the hash lib'] = function (assert) {
     assert.equal(ref2.bar.join(' '), '4 5');
     assert.equal(hash2.foo.join(' '), '0 1 2');
     assert.equal(hash2.bar.join(' '), '3 4 5');
+
+    var sum1 = Hash(ref2).reduce(function (acc, v) {
+        return acc + v.length
+    }, 0);
+    assert.equal(sum1, 4);
+
+    var sum2 = Hash.reduce(ref2, function (acc, v) {
+        return acc + v.length
+    }, 0);
+    assert.equal(sum2, 4);
+
+    var ref3 = { a : 5, b : 2, c : 7, 1337 : 'leet' };
+    var f1 = Hash.filter(ref3, function (v, k) { return v > 5 || k > 5 });
+    assert.equal(Object.keys(f1).sort().join(' '), '1337 c');
 };