fix($location): reset $location.$$replace with every watch call

Closes #1111

src/ng/location.js

@@ -590,6 +590,7 @@ function $LocationProvider(){
     var changeCounter = 0;
     $rootScope.$watch(function $locationWatch() {
       var oldUrl = $browser.url();
+      var currentReplace = $location.$$replace;
 
       if (!changeCounter || oldUrl != $location.absUrl()) {
         changeCounter++;
@@ -598,12 +599,12 @@ function $LocationProvider(){
               defaultPrevented) {
             $location.$$parse(oldUrl);
           } else {
-            $browser.url($location.absUrl(), $location.$$replace);
-            $location.$$replace = false;
+            $browser.url($location.absUrl(), currentReplace);
             afterLocationChange(oldUrl);
           }
         });
       }
+      $location.$$replace = false;
 
       return changeCounter;
     });

test/ng/locationSpec.js

@@ -447,6 +447,29 @@ describe('$location', function() {
 
       expect($browserUrl).toHaveBeenCalledOnce();
       expect($browserUrl.mostRecentCall.args).toEqual(['http://new.com/a/b#!/n/url', true]);
+      expect($location.$$replace).toBe(false);
+    }));
+
+
+    it('should always reset replace flag after running watch', inject(function($rootScope, $location) {
+      // init watches
+      $location.url('/initUrl');
+      $rootScope.$apply();
+
+      // changes url but resets it before digest
+      $location.url('/newUrl').replace().url('/initUrl');
+      $rootScope.$apply();
+      expect($location.$$replace).toBe(false);
+
+      // set the url to the old value
+      $location.url('/newUrl').replace();
+      $rootScope.$apply();
+      expect($location.$$replace).toBe(false);
+
+      // doesn't even change url only calls replace()
+      $location.replace();
+      $rootScope.$apply();
+      expect($location.$$replace).toBe(false);
     }));
 
 

test/ng/routeSpec.js

@@ -560,20 +560,15 @@ describe('$route', function() {
         $routeProvider.when('/bar/:id', {templateUrl: 'bar.html'});
         $routeProvider.when('/foo/:id/:extra', {redirectTo: '/bar/:id'});
       });
-      inject(function($route, $location, $rootScope) {
-        var replace;
-
-        $rootScope.$on('$locationChangeStart', function(event, newUrl, oldUrl) {
-          if (oldUrl == 'http://server/#/foo/id3/eId') {
-            replace = $location.$$replace;
-          }
-        });
+      inject(function($browser, $route, $location, $rootScope) {
+        var $browserUrl = spyOnlyCallsWithArgs($browser, 'url').andCallThrough();
 
         $location.path('/foo/id3/eId');
         $rootScope.$digest();
 
         expect($location.path()).toEqual('/bar/id3');
-        expect(replace).toBe(true);
+        expect($browserUrl.mostRecentCall.args)
+            .toEqual(['http://server/#/bar/id3?extra=eId', true]);
       });
     });
   });