fix($browser): normalize inputted URLs

Fixes #16100

Author: jbedard

src/ng/browser.js

@@ -131,6 +131,16 @@ function Browser(window, document, $log, $sniffer) {
     // setter
     if (url) {
       var sameState = lastHistoryState === state;
+      var trailingSlashRe = /\/$/;
+      var hasTrailingSlash = trailingSlashRe.test(url);
+
+      // Normalize the inputted URL ...
+      url = urlResolve(url).href;
+
+      // ... but keep the (lack of) trailing '/' consistent
+      if (!hasTrailingSlash && trailingSlashRe.test(url)) {
+        url = url.replace(trailingSlashRe, "");
+      }
 
       // Don't change anything if previous and current URLs and states match. This also prevents
       // IE<10 from getting into redirect loop when in LocationHashbangInHtml5Url mode.

test/ng/browserSpecs.js

@@ -568,6 +568,30 @@ describe('browser', function() {
           expect(replaceState).not.toHaveBeenCalled();
           expect(locationReplace).not.toHaveBeenCalled();
         });
+
+        it('should not do pushState with a URL only different in encoding', function() {
+          //A URL from something such as window.location.href
+          browser.url('http://server/abc?q=%27');
+
+          pushState.calls.reset();
+          replaceState.calls.reset();
+          locationReplace.calls.reset();
+
+          //A prettier URL from something such as $location
+          browser.url('http://server/abc?q=\'');
+          expect(pushState).not.toHaveBeenCalled();
+          expect(replaceState).not.toHaveBeenCalled();
+          expect(locationReplace).not.toHaveBeenCalled();
+        });
+
+        it('should not do pushState on $$checkUrlChange() with a URL only different in encoding', function() {
+          var callback = jasmine.createSpy('onUrlChange');
+          browser.onUrlChange(callback);
+          browser.url('http://server/abc?q=\'');
+
+          browser.$$checkUrlChange();
+          expect(callback).not.toHaveBeenCalled();
+        });
       };
     }
   });
@@ -1014,7 +1038,7 @@ describe('browser', function() {
     it('should not interfere with legacy browser url replace behavior', function() {
       inject(function($rootScope) {
         var current = fakeWindow.location.href;
-        var newUrl = 'notyet';
+        var newUrl = 'http://notyet';
         sniffer.history = false;
         expect(historyEntriesLength).toBe(1);
         browser.url(newUrl, true);