added events.filter and events.onfilter methods

@@ -653,7 +653,7 @@ Casper.prototype.open = function(location, options) {
         this.setHttpAuth(httpAuth.username, httpAuth.password);
     }
     this.emit('open', location);
-    this.page.open(location);
+    this.page.open(this.filter('open.location', location) || location);
     return this;
 };
 

@@ -213,3 +213,29 @@ EventEmitter.prototype.listeners = function(type) {
   }
   return this._events[type];
 };
+
+// Added for CasperJS: filters a value attached to an event
+EventEmitter.prototype.filter = function() {
+  var type = arguments[0];
+  if (!this._filters) {
+    return;
+  }
+  var filter = this._filters[type];
+  if (!filter || typeof filter !== 'function') {
+    return;
+  }
+  return filter.apply(null, Array.prototype.splice.call(arguments, 1));
+};
+
+EventEmitter.prototype.setFilter = function(type, filterFn) {
+  if (!this._filters) this._filters = {};
+  if ('function' !== typeof filterFn) {
+    throw new Error('setFilter only takes instances of Function');
+  }
+  if (!this._filters[type]) {
+    this._filters[type] = filterFn;
+    return true;
+  }
+  // TODO: process multiple filters? in which order? disallow?
+  return false;
+};

@@ -5,28 +5,23 @@ if (!phantom.casperLoaded) {
 
 var fs = require('fs');
 var utils = require('utils');
-
-// Overriding Casper.open to prefix all test urls
-require('casper').Casper.extend({
-    open: function(location, options) {
-        options = utils.isType(options, "object") ? options : {};
-        this.requestUrl = location;
-        var url = 'file://' + phantom.casperPath + '/' + location;
-        this.page.open(url);
-        return this;
-    }
-});
-
 var casper = require('casper').create({
     faultTolerant: false
 });
 
+// Overriding Casper.open to prefix all test urls
+casper.setFilter('open.location', function(location) {
+    return 'file://' + phantom.casperPath + '/' + location;
+});
+
 var tests = [];
+
 if (casper.cli.args.length) {
     tests = casper.cli.args.filter(function(path) {
         return fs.isFile(path) || fs.isDirectory(path);
     });
 }
+
 if (!tests.length) {
     if (casper.cli.args.length > 0) {
         casper.echo('No valid test path passed, exiting.', 'ERROR').exit(1);
@@ -35,4 +30,5 @@ if (!tests.length) {
     casper.echo('Running complete CasperJS test suite', 'INFO');
     tests = [fs.absolute(fs.pathJoin(phantom.casperPath, 'tests', 'suites'))];
 }
+
 casper.test.runSuites.apply(casper.test, tests);