diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/test/core/selection-classed-test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/core/selection-classed-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,219 @@
+require("../env");
+require("../../d3");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("selection.call");
+
+suite.addBatch({
+  "select(body)": {
+    topic: function() {
+      return d3.select("body").html("");
+    },
+    "adds a missing class as true": function(body) {
+      body.attr("class", null);
+      body.classed("foo", true);
+      assert.equal(document.body.className, "foo");
+      body.classed("bar", true);
+      assert.equal(document.body.className, "foo bar");
+    },
+    "adds a missing class as a function": function(body) {
+      body.attr("class", null);
+      body.classed("foo", function() { return true; });
+      assert.equal(document.body.className, "foo");
+      body.classed("bar", function() { return true; });
+      assert.equal(document.body.className, "foo bar");
+    },
+    "removes an existing class as false": function(body) {
+      body.attr("class", "bar foo");
+      body.classed("foo", false);
+      assert.equal(document.body.className, "bar");
+      body.classed("bar", false);
+      assert.equal(document.body.className, "");
+    },
+    "removes an existing class as a function": function(body) {
+      body.attr("class", "bar foo");
+      body.classed("foo", function() { return false; });
+      assert.equal(document.body.className, "bar");
+      body.classed("bar", function() { return false; });
+      assert.equal(document.body.className, "");
+    },
+    "preserves an existing class as true": function(body) {
+      body.attr("class", "bar foo");
+      body.classed("foo", true);
+      assert.equal(document.body.className, "bar foo");
+      body.classed("bar", true);
+      assert.equal(document.body.className, "bar foo");
+    },
+    "preserves an existing class as a function": function(body) {
+      body.attr("class", "bar foo");
+      body.classed("foo", function() { return true; });
+      assert.equal(document.body.className, "bar foo");
+      body.classed("bar", function() { return true; });
+      assert.equal(document.body.className, "bar foo");
+    },
+    "preserves a missing class as false": function(body) {
+      body.attr("class", "baz");
+      body.classed("foo", false);
+      assert.equal(document.body.className, "baz");
+      body.attr("class", null);
+      body.classed("bar", false);
+      assert.equal(document.body.className, "");
+    },
+    "preserves a missing class as a function": function(body) {
+      body.attr("class", "baz");
+      body.classed("foo", function() { return false; });
+      assert.equal(document.body.className, "baz");
+      body.attr("class", null);
+      body.classed("bar", function() { return false; });
+      assert.equal(document.body.className, "");
+    },
+    "gets an existing class": function(body) {
+      body.attr("class", " foo\tbar  baz");
+      assert.isTrue(body.classed("foo"));
+      assert.isTrue(body.classed("bar"));
+      assert.isTrue(body.classed("baz"));
+    },
+    "does not get a missing class": function(body) {
+      body.attr("class", " foo\tbar  baz");
+      assert.isFalse(body.classed("foob"));
+      assert.isFalse(body.classed("bare"));
+      assert.isFalse(body.classed("rbaz"));
+    },
+    "returns the current selection": function(body) {
+      assert.isTrue(body.classed("foo", true) === body);
+    },
+    "adds missing classes as true": function(body) {
+      body.attr("class", null);
+      body.classed("foo bar", true);
+      assert.equal(document.body.className, "foo bar");
+    },
+    "gets existing classes": function(body) {
+      body.attr("class", " foo\tbar  baz");
+      assert.isTrue(body.classed("foo"));
+      assert.isTrue(body.classed("foo bar"));
+      assert.isTrue(body.classed("bar baz"));
+      assert.isTrue(body.classed("foo bar baz"));
+    },
+    "does not get missing classes": function(body) {
+      body.attr("class", " foo\tbar  baz");
+      assert.isFalse(body.classed("foob"));
+      assert.isFalse(body.classed("foob bar"));
+      assert.isFalse(body.classed("bar baz blah"));
+      assert.isFalse(body.classed("foo bar baz moo"));
+    }
+  }
+});
+
+suite.addBatch({
+  "selectAll(div)": {
+    topic: function() {
+      return d3.select("body").html("").selectAll("div").data(d3.range(2)).enter().append("div");
+    },
+    "adds a missing class as true": function(div) {
+      div.attr("class", null);
+      div.classed("foo", true);
+      assert.equal(div[0][0].className, "foo");
+      assert.equal(div[0][1].className, "foo");
+      div.classed("bar", true);
+      assert.equal(div[0][0].className, "foo bar");
+      assert.equal(div[0][1].className, "foo bar");
+    },
+    "adds a missing class as a function": function(div) {
+      div.data([0, 1]).attr("class", null);
+      div.classed("foo", function(d, i) { return d === 0; });
+      assert.equal(div[0][0].className, "foo");
+      assert.equal(div[0][1].className, "");
+      div.classed("bar", function(d, i) { return i === 1; });
+      assert.equal(div[0][0].className, "foo");
+      assert.equal(div[0][1].className, "bar");
+    },
+    "removes an existing class as false": function(div) {
+      div.attr("class", "bar foo");
+      div.classed("foo", false);
+      assert.equal(div[0][0].className, "bar");
+      assert.equal(div[0][1].className, "bar");
+      div.classed("bar", false);
+      assert.equal(div[0][0].className, "");
+      assert.equal(div[0][1].className, "");
+    },
+    "removes an existing class as a function": function(div) {
+      div.data([0, 1]).attr("class", "bar foo");
+      div.classed("foo", function(d, i) { return d === 0; });
+      assert.equal(div[0][0].className, "bar foo");
+      assert.equal(div[0][1].className, "bar");
+      div.classed("bar", function(d, i) { return i === 1; });
+      assert.equal(div[0][0].className, "foo");
+      assert.equal(div[0][1].className, "bar");
+      div.classed("foo", function() { return false; });
+      assert.equal(div[0][0].className, "");
+      assert.equal(div[0][1].className, "bar");
+      div.classed("bar", function() { return false; });
+      assert.equal(div[0][0].className, "");
+      assert.equal(div[0][1].className, "");
+    },
+    "preserves an existing class as true": function(div) {
+      div.attr("class", "bar foo");
+      div.classed("foo", true);
+      assert.equal(div[0][0].className, "bar foo");
+      assert.equal(div[0][1].className, "bar foo");
+      div.classed("bar", true);
+      assert.equal(div[0][0].className, "bar foo");
+      assert.equal(div[0][1].className, "bar foo");
+    },
+    "preserves an existing class as a function": function(div) {
+      div.attr("class", "bar foo");
+      div.classed("foo", function() { return true; });
+      assert.equal(div[0][0].className, "bar foo");
+      assert.equal(div[0][1].className, "bar foo");
+      div.classed("bar", function() { return true; });
+      assert.equal(div[0][0].className, "bar foo");
+      assert.equal(div[0][1].className, "bar foo");
+    },
+    "preserves a missing class as false": function(div) {
+      div.attr("class", "baz");
+      div.classed("foo", false);
+      assert.equal(div[0][0].className, "baz");
+      assert.equal(div[0][1].className, "baz");
+      div.attr("class", null);
+      div.classed("bar", false);
+      assert.equal(div[0][0].className, "");
+      assert.equal(div[0][1].className, "");
+    },
+    "preserves a missing class as a function": function(div) {
+      div.attr("class", "baz");
+      div.classed("foo", function() { return false; });
+      assert.equal(div[0][0].className, "baz");
+      assert.equal(div[0][1].className, "baz");
+      div.attr("class", null);
+      div.classed("bar", function() { return false; });
+      assert.equal(div[0][0].className, "");
+      assert.equal(div[0][1].className, "");
+    },
+    "gets an existing class": function(div) {
+      div[0][0].className = " foo\tbar  baz";
+      assert.isTrue(div.classed("foo"));
+      assert.isTrue(div.classed("bar"));
+      assert.isTrue(div.classed("baz"));
+    },
+    "does not get a missing class": function(div) {
+      div[0][0].className = " foo\tbar  baz";
+      assert.isFalse(div.classed("foob"));
+      assert.isFalse(div.classed("bare"));
+      assert.isFalse(div.classed("rbaz"));
+    },
+    "ignores null nodes": function(div) {
+      var some = d3.selectAll("div");
+      some[0][1] = null;
+      some.attr("class", null).classed("foo", true);
+      assert.equal(div[0][0].className, "foo");
+      assert.equal(div[0][1].className, "");
+    },
+    "returns the current selection": function(div) {
+      assert.isTrue(div.classed("foo", true) === div);
+    }
+  }
+});
+
+suite.export(module);