Redirect signin if authenticated

closes #3147
- added beforeModel redirect
- added test

Author: sebgie

core/client/routes/signin.js

@@ -3,6 +3,11 @@ import loadingIndicator from 'ghost/mixins/loading-indicator';
 
 var SigninRoute = Ember.Route.extend(styleBody, loadingIndicator, {
     classNames: ['ghost-login'],
+    beforeModel: function () {
+        if (this.get('session').isAuthenticated) {
+            this.transitionTo(Ember.SimpleAuth.routeAfterAuthentication);
+        }
+    },
     actions: {
         sessionAuthenticationFailed: function (error) {
             this.notifications.showError(error.message);

core/test/functional/base.js

@@ -87,6 +87,11 @@ screens = {
        url: 'ghost/signin/',
        selector: '.button-save'
    },
+   'signin-authenticated': {
+       url: 'ghost/signin/',
+       //signin with authenticated user redirects to posts
+       selector: '#main-menu .content.active'
+   },
    'signout': {
        url: 'ghost/signout/',
        linkSelector: '#user-menu li.usermenu-signout a',

core/test/functional/client/signin_test.js

@@ -146,6 +146,35 @@ CasperTest.begin('Can login to Ghost', 5, function suite(test) {
     });
 }, true);
 
+CasperTest.begin('Authenticated user is redirected', 8, function suite(test) {
+    casper.thenOpenAndWaitForPageLoad('signin', function testTitleAndUrl() {
+        test.assertTitle('Ghost Admin', 'Ghost admin has no title');
+        test.assertUrlMatch(/ghost\/signin\/$/, 'Landed on the correct URL');
+    });
+
+    casper.waitForOpaque('.login-box', function then() {
+        this.fillAndSave('#login', user);
+    });
+
+    casper.wait(2000);
+
+    casper.waitForResource(/posts/, function testForDashboard() {
+        test.assertUrlMatch(/ghost\/\d+\/$/, 'Landed on the correct URL');
+        test.assertExists('#global-header', 'Global admin header is present');
+        test.assertExists('.manage', 'We\'re now on content');
+    }, function onTimeOut() {
+        test.fail('Failed to signin');
+    });
+
+    casper.thenOpenAndWaitForPageLoad('signin-authenticated', function testTitleAndUrl() {
+        test.assertUrlMatch(/ghost\/\d+\/$/, 'Landed on the correct URL');
+        test.assertExists('#global-header', 'Global admin header is present');
+        test.assertExists('.manage', 'We\'re now on content');
+    }, function onTimeOut() {
+        test.fail('Failed to redirect');
+    });
+}, true);
+
 // TODO: please uncomment when the validation problem is fixed (https://github.com/TryGhost/Ghost/issues/3120)
 // CasperTest.begin('Ensure email field form validation', 3, function suite(test) {
 //     casper.thenOpenAndWaitForPageLoad('signin', function testTitleAndUrl() {