diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/test/core/selection-property-test.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/test/core/selection-property-test.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,91 @@
+require("../env");
+require("../../d3");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("selection.property");
+
+suite.addBatch({
+  "select(body)": {
+    topic: function() {
+      return d3.select("body").html("");
+    },
+    "sets a property as a string": function(body) {
+      body.property("bgcolor", "red");
+      assert.equal(document.body.bgcolor, "red");
+    },
+    "sets a property as a number": function(body) {
+      body.property("opacity", 1);
+      assert.equal(document.body.opacity, "1");
+    },
+    "sets a property as a function": function(body) {
+      body.property("bgcolor", function() { return "orange"; });
+      assert.equal(document.body.bgcolor, "orange");
+    },
+    "gets a property value": function(body) {
+      document.body.bgcolor = "yellow";
+      assert.equal(body.property("bgcolor"), "yellow");
+    },
+    "removes a property as null": function(body) {
+      body.property("bgcolor", "yellow").property("bgcolor", null);
+      assert.isFalse("bgcolor" in document.body);
+    },
+    "removes a property as a function": function(body) {
+      body.property("bgcolor", "yellow").property("bgcolor", function() { return null });
+      assert.isFalse("bgcolor" in document.body);
+    },
+    "returns the current selection": function(body) {
+      assert.isTrue(body.property("bgcolor", "yellow") === body);
+    }
+  }
+});
+
+suite.addBatch({
+  "selectAll(div)": {
+    topic: function() {
+      return d3.select("body").html("").selectAll("div").data(d3.range(2)).enter().append("div");
+    },
+    "sets a property as a string": function(div) {
+      div.property("bgcolor", "red");
+      assert.equal(div[0][0].bgcolor, "red");
+      assert.equal(div[0][1].bgcolor, "red");
+    },
+    "sets a property as a number": function(div) {
+      div.property("opacity", 0.4);
+      assert.equal(div[0][0].opacity, "0.4");
+      assert.equal(div[0][1].opacity, "0.4");
+    },
+    "sets a property as a function": function(div) {
+      div.property("bgcolor", d3.interpolateRgb("brown", "steelblue"));
+      assert.equal(div[0][0].bgcolor, "#a52a2a");
+      assert.equal(div[0][1].bgcolor, "#4682b4");
+    },
+    "gets a property value": function(div) {
+      div[0][0].bgcolor = "purple";
+      assert.equal(div.property("bgcolor"), "purple");
+    },
+    "removes a property as null": function(div) {
+      div.property("bgcolor", "yellow").property("bgcolor", null);
+      assert.isFalse("bgcolor" in div[0][0]);
+      assert.isFalse("bgcolor" in div[0][1]);
+    },
+    "removes a property as a function": function(div) {
+      div.property("bgcolor", "yellow").property("bgcolor", function() { return null });
+      assert.isFalse("bgcolor" in div[0][0]);
+      assert.isFalse("bgcolor" in div[0][1]);
+    },
+    "ignores null nodes": function(div) {
+      var some = d3.selectAll("div");
+      some[0][1] = null;
+      some.property("bgcolor", null).property("bgcolor", "red");
+      assert.equal(div[0][0].bgcolor, "red");
+      assert.isFalse("bgcolor" in div[0][1]);
+    },
+    "returns the current selection": function(div) {
+      assert.isTrue(div.property("bgcolor", "yellow") === div);
+    }
+  }
+});
+
+suite.export(module);