decode tag name before passing it into TagFollowingAction, fixes #4027

Changelog.md

@@ -8,6 +8,7 @@
 * Delegate parent_author to the target of a RelayableRetraction
 * Do not fail on receiving a SignedRetraction via the public route
 * Pass the real values to stderr_path and stdout_path in unicorn.rb since it runs a case statement on them.
+* Decode tag name before passing it into a TagFollowingAction [#4027](https://github.com/diaspora/diaspora/issues/4027)
 
 ## Refactor
 

app/assets/javascripts/app/router.js

@@ -77,7 +77,7 @@ app.Router = Backbone.Router.extend({
 
     if(name) {
       var followedTagsAction = new app.views.TagFollowingAction(
-            {tagText: name}
+            {tagText: decodeURIComponent(name)}
           );
       $("#author_info").prepend(followedTagsAction.render().el)
     }

spec/javascripts/app/router_spec.js

@@ -0,0 +1,19 @@
+describe('app.Router', function () {
+  describe('followed_tags', function() {
+    it('decodes name before passing it into TagFollowingAction', function () {
+      var followed_tags = spyOn(app.router, 'followed_tags').andCallThrough();
+      var tag_following_action = spyOn(app.views, 'TagFollowingAction').andCallFake(function(data) {
+        return {render: function() { return {el: ""}}};
+      });
+      spyOn(window.history, 'pushState').andCallFake(function (data, title, url) {
+        var route = app.router._routeToRegExp("tags/:name");
+        var args = app.router._extractParameters(route, url.replace(/^\//, ""));
+        app.router.followed_tags(args[0]);
+      });
+      window.preloads = {tagFollowings: []};
+      app.router.navigate('/tags/'+encodeURIComponent('օբյեկտիվ'));
+      expect(followed_tags).toHaveBeenCalled();
+      expect(tag_following_action).toHaveBeenCalledWith({tagText: 'օբյեկտիվ'});
+    });
+  });
+});