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diff --git a/web-ui/test/spec/page/router.spec.js b/web-ui/test/spec/page/router.spec.js
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+++ b/web-ui/test/spec/page/router.spec.js
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+/*global Smail */
+/*global jasmine */
+describeComponent('page/router', function () {
+  'use strict';
+
+  var fakeHistory;
+
+  describe('on router:pushState coming from a tag selection', function () {
+    beforeEach(function () {
+      fakeHistory = jasmine.createSpyObj('history', ['pushState']);
+      setupComponent({history: fakeHistory});
+    });
+
+    it('pushes the state with the tag and the url', function () {
+      $(document).trigger(Smail.events.router.pushState, { tag: 'inbox'});
+
+      expect(fakeHistory.pushState).toHaveBeenCalledWith(jasmine.objectContaining({ tag: 'inbox' }), '', '/#/inbox');
+    });
+
+    it('pushes the state with mailIdent', function () {
+      $(document).trigger(Smail.events.router.pushState, { tag: 'inbox', mailIdent: 1});
+
+      expect(fakeHistory.pushState).toHaveBeenCalledWith(jasmine.objectContaining({ tag: 'inbox', mailIdent: 1 }), '', '/#/inbox/mail/1');
+    });
+
+    it('pushes the state with mailIdent even if mail ident is 0 (that happens for drafts)', function () {
+      $(document).trigger(Smail.events.router.pushState, { tag: 'inbox', mailIdent: 0});
+
+      expect(fakeHistory.pushState).toHaveBeenCalledWith(jasmine.objectContaining({ tag: 'inbox', mailIdent: 0 }), '', '/#/inbox/mail/0');
+    });
+
+    it('pushes the state with the displayNoMessage boolean forwarded from the event', function () {
+      $(document).trigger(Smail.events.router.pushState, { tag: 'inbox', mailIdent: 0});
+
+      expect(fakeHistory.pushState).toHaveBeenCalledWith(jasmine.objectContaining({ isDisplayNoMessageSelected: false}), '', '/#/inbox/mail/0');
+
+      $(document).trigger(Smail.events.router.pushState, { tag: 'inbox', mailIdent: 0, isDisplayNoMessageSelected: true});
+
+      expect(fakeHistory.pushState).toHaveBeenCalledWith(jasmine.objectContaining({ isDisplayNoMessageSelected: true}), '', '/#/inbox/mail/0');
+    });
+
+    it('when popping a state with no tag should select tag from url', function () {
+      var urlParams = require("page/router/url_params");
+      spyOn(urlParams, 'getTag').andReturn('tag');
+
+      var selectTagEvent = spyOnEvent(document, Smail.events.ui.tag.select);
+
+      this.component.smailPopState({ state: {tag: undefined} });
+
+      expect(selectTagEvent).toHaveBeenTriggeredOnAndWith(document, jasmine.objectContaining({ tag: "tag"}))
+    });
+
+    it('when popping a state triggers the displayNoMessage pane if required', function () {
+      var urlParams = require("page/router/url_params");
+      spyOn(urlParams, 'getTag').andReturn('tag');
+
+      var displayNoMessageEvent = spyOnEvent(document, Smail.events.dispatchers.rightPane.openNoMessageSelectedWithoutPushState);
+
+      this.component.smailPopState({ state: {tag: undefined, isDisplayNoMessageSelected: false} });
+
+      expect(displayNoMessageEvent).not.toHaveBeenTriggeredOn(document)
+
+      this.component.smailPopState({ state: {tag: undefined, isDisplayNoMessageSelected: true} });
+
+      expect(displayNoMessageEvent).toHaveBeenTriggeredOn(document)
+    });
+
+  });
+
+});