--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/time/days-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,105 @@
+require("../env");
+require("../../d3");
+require("../../d3.time");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("d3.time.days");
+
+suite.addBatch({
+  "days": {
+    topic: function() {
+      return d3.time.days;
+    },
+    "returns midnights": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31, 12), local(2011, 0, 3, 12)), [
+        local(2011, 0, 1),
+        local(2011, 0, 2),
+        local(2011, 0, 3)
+      ]);
+    },
+    "has an inclusive lower bound": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31), local(2011, 0, 3))[0], local(2010, 11, 31));
+    },
+    "has an exclusive upper bound": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31), local(2011, 0, 3))[2], local(2011, 0, 2));
+    },
+    "can skip days": function(range) {
+      assert.deepEqual(range(local(2010, 11, 29), local(2011, 0, 14), 5), [
+        local(2010, 11, 31),
+        local(2011, 0, 1),
+        local(2011, 0, 6),
+        local(2011, 0, 11)
+      ]);
+    },
+    "observes start of daylight savings time": function(range) {
+      assert.deepEqual(range(local(2011, 2, 12), local(2011, 2, 16)), [
+        local(2011, 2, 12),
+        local(2011, 2, 13),
+        local(2011, 2, 14),
+        local(2011, 2, 15)
+      ]);
+    },
+    "observes end of daylight savings time": function(range) {
+      assert.deepEqual(range(local(2011, 10, 5), local(2011, 10, 9)), [
+        local(2011, 10, 5),
+        local(2011, 10, 6),
+        local(2011, 10, 7),
+        local(2011, 10, 8)
+      ]);
+    },
+    "UTC": {
+      topic: function(range) {
+        return range.utc;
+      },
+      "returns midnights": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31, 12), utc(2011, 0, 3, 12)), [
+          utc(2011, 0, 1),
+          utc(2011, 0, 2),
+          utc(2011, 0, 3)
+        ]);
+      },
+      "has an inclusive lower bound": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31), utc(2011, 0, 3))[0], utc(2010, 11, 31));
+      },
+      "has an exclusive upper bound": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31), utc(2011, 0, 3))[2], utc(2011, 0, 2));
+      },
+      "can skip days": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 29), utc(2011, 0, 14), 5), [
+          utc(2010, 11, 31),
+          utc(2011, 0, 1),
+          utc(2011, 0, 6),
+          utc(2011, 0, 11)
+        ]);
+      },
+      "does not observe the start of daylight savings time": function(range) {
+        assert.deepEqual(range(utc(2011, 2, 12), utc(2011, 2, 16)), [
+          utc(2011, 2, 12),
+          utc(2011, 2, 13),
+          utc(2011, 2, 14),
+          utc(2011, 2, 15)
+        ]);
+      },
+      "does not observe the end of daylight savings time": function(range) {
+        assert.deepEqual(range(utc(2011, 10, 5), utc(2011, 10, 9)), [
+          utc(2011, 10, 5),
+          utc(2011, 10, 6),
+          utc(2011, 10, 7),
+          utc(2011, 10, 8)
+        ]);
+      }
+    }
+  }
+});
+
+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);