Merge branch 'master' of https://github.com/ZeeAgency/d3 into v2.8.0

d3.v2.js

@@ -2022,6 +2022,9 @@ function d3_selection_enter(selection) {
 
 var d3_selection_enterPrototype = [];
 
+d3.selection.enter = d3_selection_enter;
+d3.selection.enter.prototype = d3_selection_enterPrototype;
+
 d3_selection_enterPrototype.append = d3_selectionPrototype.append;
 d3_selection_enterPrototype.insert = d3_selectionPrototype.insert;
 d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;

src/core/selection-enter.js

@@ -5,6 +5,9 @@ function d3_selection_enter(selection) {
 
 var d3_selection_enterPrototype = [];
 
+d3.selection.enter = d3_selection_enter;
+d3.selection.enter.prototype = d3_selection_enterPrototype;
+
 d3_selection_enterPrototype.append = d3_selectionPrototype.append;
 d3_selection_enterPrototype.insert = d3_selectionPrototype.insert;
 d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;

test/core/selection-enter-test.js

@@ -0,0 +1,25 @@
+require("../env");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("selection.enter");
+
+suite.addBatch({
+  "selectAll(div)": {
+    topic: function() {
+      return d3.select("body").html("").selectAll("div").data(d3.range(2)).enter();
+    },
+    "is an instanceof d3.selection.enter": function(enter) {
+      assert.instanceOf(enter, d3.selection.enter);
+    },
+    "selection prototype can be extended": function(enter) {
+      d3.selection.enter.prototype.foo = function() { return this.append("foo"); };
+      var selection = enter.foo();
+      assert.equal(document.body.innerHTML, "<foo></foo><foo></foo>");
+      delete d3.selection.enter.prototype.foo;
+    }
+  }
+});
+
+suite.export(module);

test/core/selection-test.js

@@ -16,11 +16,11 @@ suite.addBatch({
       assert.equal(selection[0][0], document);
     },
     "is an instanceof d3.selection": function(selection) {
-      assert.isTrue(selection instanceof d3.selection);
+      assert.instanceOf(selection, d3.selection);
     },
     "subselections are also instanceof d3.selection": function(selection) {
-      assert.isTrue(selection.select("body") instanceof d3.selection);
-      assert.isTrue(selection.selectAll("body") instanceof d3.selection);
+      assert.instanceOf(selection.select("body"), d3.selection);
+      assert.instanceOf(selection.selectAll("body"), d3.selection);
     },
     "selection prototype can be extended": function(selection) {
       d3.selection.prototype.foo = function(v) { return this.attr("foo", v); };