diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/test/time/years-test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/time/years-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,73 @@
+require("../env");
+require("../../d3");
+require("../../d3.time");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("d3.time.years");
+
+suite.addBatch({
+  "years": {
+    topic: function() {
+      return d3.time.years;
+    },
+    "returns years": function(range) {
+      assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1)), [
+        local(2010, 0, 1),
+        local(2011, 0, 1),
+        local(2012, 0, 1)
+      ]);
+    },
+    "has an inclusive lower bound": function(range) {
+      assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1))[0], local(2010, 0, 1));
+    },
+    "has an exclusive upper bound": function(range) {
+      assert.deepEqual(range(local(2010, 0, 1), local(2013, 0, 1))[2], local(2012, 0, 1));
+    },
+    "can skip years": function(range) {
+      assert.deepEqual(range(local(2009, 0, 1), local(2029, 0, 1), 5), [
+        local(2010, 0, 1),
+        local(2015, 0, 1),
+        local(2020, 0, 1),
+        local(2025, 0, 1)
+      ]);
+    },
+    "UTC": {
+      topic: function(range) {
+        return range.utc;
+      },
+      "returns years": function(range) {
+        assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1)), [
+          utc(2010, 0, 1),
+          utc(2011, 0, 1),
+          utc(2012, 0, 1)
+        ]);
+      },
+      "has an inclusive lower bound": function(range) {
+        assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1))[0], utc(2010, 0, 1));
+      },
+      "has an exclusive upper bound": function(range) {
+        assert.deepEqual(range(utc(2010, 0, 1), utc(2013, 0, 1))[2], utc(2012, 0, 1));
+      },
+      "can skip years": function(range) {
+        assert.deepEqual(range(utc(2009, 0, 1), utc(2029, 0, 1), 5), [
+          utc(2010, 0, 1),
+          utc(2015, 0, 1),
+          utc(2020, 0, 1),
+          utc(2025, 0, 1)
+        ]);
+      }
+    }
+  }
+});
+
+function local(year, month, day, hours, minutes, seconds) {
+  return new Date(year, month, day, hours || 0, minutes || 0, seconds || 0);
+}
+
+function utc(year, month, day, hours, minutes, seconds) {
+  return new Date(Date.UTC(year, month, day, hours || 0, minutes || 0, seconds || 0));
+}
+
+suite.export(module);