added outstanding request queue

src/Browser.js

@@ -8,6 +8,7 @@ function Browser(location, document) {
   this.urlListeners = [];
   this.hoverListener = noop;
   this.isMock = false;
+  this.outstandingRequests = { count: 0, callbacks:[]};
 
   this.XHR = window.XMLHttpRequest || function () {
     try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch (e1) {}
@@ -57,16 +58,42 @@ Browser.prototype = {
       callback = post;
       post = null;
     }
-    var xhr = new this.XHR();
+    var xhr = new this.XHR(),
+        self = this;
     xhr.open(method, url, true);
+    this.outstandingRequests.count ++;
     xhr.onreadystatechange = function() {
       if (xhr.readyState == 4) {
-        callback(xhr.status || 200, xhr.responseText);
+        try {
+          callback(xhr.status || 200, xhr.responseText);
+        } finally {
+          self.outstandingRequests.count--;
+          self.processRequestCallbacks();
+        }
       }
     };
     xhr.send(post || '');
   },
 
+  processRequestCallbacks: function(){
+    if (this.outstandingRequests.count === 0) {
+      while(this.outstandingRequests.callbacks.length) {
+        try {
+          this.outstandingRequests.callbacks.pop()();
+        } catch (e) {
+        }
+      }
+    }
+  },
+
+  notifyWhenNoOutstandingRequests: function(callback){
+    if (this.outstandingRequests.count === 0) {
+      callback();
+    } else {
+      this.outstandingRequests.callbacks.push(callback);
+    }
+  },
+
   watchUrl: function(fn){
     this.urlListeners.push(fn);
   },

test/BrowserSpecs.js

@@ -0,0 +1,48 @@
+describe('browser', function(){
+
+  var browser, location;
+
+  beforeEach(function(){
+    location = {href:"http://server", hash:""};
+    browser = new Browser(location, {});
+    browser.setTimeout = noop;
+  });
+
+  it('should watch url', function(){
+    browser.delay = 1;
+    expectAsserts(2);
+    browser.watchUrl(function(url){
+      assertEquals('http://getangular.test', url);
+    });
+    browser.setTimeout = function(fn, delay){
+      assertEquals(1, delay);
+      location.href = "http://getangular.test";
+      browser.setTimeout = function(fn, delay) {};
+      fn();
+    };
+    browser.startUrlWatcher();
+  });
+
+  describe('outstading requests', function(){
+    it('should process callbacks immedietly with no outstanding requests', function(){
+      var callback = jasmine.createSpy('callback');
+      browser.notifyWhenNoOutstandingRequests(callback);
+      expect(callback).wasCalled();
+    });
+
+    it('should queue callbacks with outstanding requests', function(){
+      var callback = jasmine.createSpy('callback');
+      browser.outstandingRequests.count = 1;
+      browser.notifyWhenNoOutstandingRequests(callback);
+      expect(callback).not.wasCalled();
+
+      browser.processRequestCallbacks();
+      expect(callback).not.wasCalled();
+
+      browser.outstandingRequests.count = 0;
+      browser.processRequestCallbacks();
+      expect(callback).wasCalled();
+    });
+  });
+
+});

test/BrowserTest.js

@@ -1,25 +0,0 @@
-BrowserTest = TestCase('BrowserTest');
-
-BrowserTest.prototype.testUrlWatcher = function () {
-  expectAsserts(2);
-  var location = {href:"http://server", hash:""};
-  var watcher = new Browser(location, {});
-  watcher.delay = 1;
-  watcher.watchUrl(function(url){
-    assertEquals('http://getangular.test', url);
-  });
-  watcher.setTimeout = function(fn, delay){
-    assertEquals(1, delay);
-    location.href = "http://getangular.test";
-    watcher.setTimeout = function(fn, delay) {
-    };
-    fn();
-  };
-  watcher.startUrlWatcher();
-};
-
-FunctionTest = TestCase("FunctionTest");
-
-FunctionTest.prototype.testEscapeHtml = function () {
-  assertEquals("&lt;div&gt;&amp;amp;&lt;/div&gt;", escapeHtml('<div>&amp;</div>'));
-};