changed scope of d4 var to work with how browserify compiles

Gruntfile.js

@@ -53,6 +53,14 @@ module.exports = function(grunt) {
         }
       }
     },
+    browserify: {
+      specs: {
+        src: ["test/tests/browserify-test.js"],
+        dest: "test/tests/d4-bundle.js",
+        options: {
+        }
+      }
+    },
     mocha: {
       options: {
         run: true,
@@ -124,8 +132,9 @@ module.exports = function(grunt) {
   grunt.loadNpmTasks('grunt-mocha');
   grunt.loadNpmTasks('grunt-plato');
   grunt.loadNpmTasks('grunt-remove-logging');
+  grunt.loadNpmTasks('grunt-browserify');
 
-  grunt.registerTask('test', ['concat', 'mocha']);
+  grunt.registerTask('test', ['concat', 'browserify', 'mocha']);
   grunt.registerTask('quality', ['plato']);
   grunt.registerTask('default', ['jsbeautifier', 'jshint', 'test']);
   grunt.registerTask('release', ['default', 'concat', 'uglify', 'removelogging']);

d4.js

@@ -1,6 +1,6 @@
-/*! d4 - v0.9.5
+/*! d4 - v0.9.6
  *  License: MIT Expat
- *  Date: 2016-03-10
+ *  Date: 2016-03-28
  *  Copyright: Mark Daggett, D4 Team
  */
 /*!
@@ -9,14 +9,17 @@
   (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
   Underscore may be freely distributed under the MIT license.
 */
+
+var d4;
+
 (function() {
   'use strict';
 
   var root = this;
   var breaker = {};
 
   // Create a safe reference to the d4 object.
-  var d4 = function(obj) {
+  d4 = function(obj) {
     if (obj instanceof d4) {
       return obj;
     }

package.json

@@ -24,6 +24,7 @@
     "chai": "~1.9.0",
     "chai-spies": "~0.5.1",
     "grunt": "~0.4.0",
+    "grunt-browserify": "^5.0.0",
     "grunt-cli": "~0.1.11",
     "grunt-contrib-concat": "~0.1.3",
     "grunt-contrib-jshint": "~0.1.1",

src/base.js

@@ -4,14 +4,17 @@
   (c) 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
   Underscore may be freely distributed under the MIT license.
 */
+
+var d4;
+
 (function() {
   'use strict';
 
   var root = this;
   var breaker = {};
 
   // Create a safe reference to the d4 object.
-  var d4 = function(obj) {
+  d4 = function(obj) {
     if (obj instanceof d4) {
       return obj;
     }

test/index.html

@@ -16,6 +16,7 @@
     <link href="lib/mocha.css" rel="stylesheet"></link>
     <title>d4 test suite</title>
     <script src="../bower_components/d3/d3.js"></script>
+    <script src="tests/d4-bundle.js"></script>
     <script src="lib/d4.js"></script>
     <script src="tests/axis-tests.js"></script>
     <script src="tests/base-test.js"></script>

test/tests/browserify-test.js

@@ -0,0 +1,13 @@
+/*global describe:true*/
+/*global it:true*/
+/*global beforeEach:true*/
+/*global document:true*/
+
+'use strict';
+
+describe( 'using browserify', function(){
+  it('should compile d4 with require', function() {
+     var d4 = require( '../lib/d4.js' );
+     expect(d4).to.not.be.an('undefined');
+  });
+});