[test] setup local testling

package.json

@@ -3,6 +3,9 @@
   "version": "1.0.7",
   "description": "Builtins that were extracted from node-browser-resolve on which browserify depends",
   "main": "index.js",
+  "scripts": {
+    "test": "tape test/node/* && browserify --transform ./test/browserify-transform.js test/browser/* | testling"
+  },
   "repository": {
     "type": "git",
     "url": "git://github.com/alexgorbatchev/node-browser-builtins.git"
@@ -22,5 +25,8 @@
     "buffer-browserify": "0.1.x",
     "zlib-browserify": "0.0.x",
     "constants-browserify": "0.0.x"
+  },
+  "devDependencies": {
+    "tape": "1.0.x"
   }
 }

test/browserify-transform.js

@@ -0,0 +1,42 @@
+
+// This transformer changes the require calls so they don't point to the
+// browserify buildins (older version of this module).
+
+var path = require('path');
+var util = require('util');
+var stream = require('stream');
+var buildins = require('../index.js');
+
+function RequireRedirect() {
+  if (!(this instanceof RequireRedirect)) return new RequireRedirect();
+  stream.Transform.call(this);
+  this.buffers = [];
+}
+module.exports = RequireRedirect;
+util.inherits(RequireRedirect, stream.Transform);
+
+RequireRedirect.prototype._transform = function (chunk, encoding, done) {
+  this.buffers.push(chunk);
+  done(null);
+};
+
+// NOTE: this is an incomplete require RegExp, but for internal use here
+//  its fine.
+var REQUIRE_REGEX = /require\((?:"|')([^"']+)(?:"|')\)/g;
+
+var RELATIVE_DIR = path.resolve(__dirname, '..');
+
+RequireRedirect.prototype._flush = function (done) {
+  var file = Buffer.concat(this.buffers).toString();
+
+  file = file.replace(REQUIRE_REGEX, function (source, name) {
+    if (buildins.hasOwnProperty(name)) {
+      return "require('" + buildins[name] + "')";
+    } else {
+      return source;
+    }
+  });
+
+  this.push(file);
+  done(null);
+};