now using expresso for test suite, json test written

tests/json.js

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+var sys = require('sys');
+var Traverse = require('traverse');
+
+exports['json test'] = function (assert) {
+    var id = 54;
+    var callbacks = {};
+    var obj = { moo : function () {}, foo : [2,3,4, function () {}] };
+
+    var scrubbed = Traverse(obj).modify(function (x) {
+        if (x instanceof Function) {
+            callbacks[id] = { id : id, f : x, path : this.path };
+            this.update('[Function]');
+            id++;
+        }
+    }).get();
+
+    assert.equal(
+        scrubbed.moo, '[Function]',
+        'obj.moo replaced with "[Function]"'
+    );
+    assert.equal(
+        scrubbed.foo[3], '[Function]',
+        'obj.foo[3] replaced with "[Function]"'
+    )
+    assert.equal(
+        JSON.stringify(scrubbed),
+        '{"moo":"[Function]","foo":[2,3,4,"[Function]"]}',
+        'Full JSON string matches'
+    );
+    assert.equal(
+        typeof obj.moo, 'function',
+        'Original obj.moo still a function'
+    );
+    assert.equal(
+        typeof obj.foo[3], 'function',
+        'Original obj.foo[3] still a function'
+    );
+    assert.equal(
+        sys.inspect(callbacks),
+        "{ '54': { id: 54, f: [Function], path: [ 'moo' ] }\n"
+        + ", '55': { id: 55, f: [Function], path: [ 'foo', '3' ] }\n}",
+        'Check the generated callbacks list'
+    );
+};
+