diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/test/core/zip-test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/core/zip-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,32 @@
+require("../env");
+require("../../d3");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("d3.zip");
+
+suite.addBatch({
+  "zip": {
+    topic: function() {
+      return d3.zip;
+    },
+    "transposes a square matrix": function(zip) {
+      assert.deepEqual(d3.zip([1, 2], [3, 4]), [[1, 3], [2, 4]]);
+    },
+    "transposes a non-square matrix": function(zip) {
+      assert.deepEqual(d3.zip([1, 2, 3, 4, 5], [2, 4, 6, 8, 10]), [[1, 2], [2, 4], [3, 6], [4, 8], [5, 10]]);
+    },
+    "transposes a single-row matrix": function(zip) {
+      assert.deepEqual(d3.zip([1, 2, 3, 4, 5]), [[1], [2], [3], [4], [5]]);
+    },
+    "transposes an empty matrix": function(zip) {
+      assert.deepEqual(d3.zip(), []);
+    },
+    "ignores extra elements given an irregular matrix": function(zip) {
+      assert.deepEqual(d3.zip([1, 2], [3, 4], [5, 6, 7]), [[1, 3, 5], [2, 4, 6]]);
+    }
+  }
+});
+
+suite.export(module);