Move Dashboard shortcuts specs from Spinah to RSpec

Signed-off-by: Rémy Coutable <remy@rymai.me>

features/dashboard/shortcuts.feature

-@dashboard
-Feature: Dashboard Shortcuts
-  Background:
-    Given I sign in as a user
-    And I visit dashboard page
-
-  @javascript
-  Scenario: Navigate to projects tab
-    Given I press "g" and "p"
-    Then the active main tab should be Projects
-
-  @javascript
-  Scenario: Navigate to issue tab
-    Given I press "g" and "i"
-    Then the active main tab should be Issues
-
-  @javascript
-  Scenario: Navigate to merge requests tab
-    Given I press "g" and "m"
-    Then the active main tab should be Merge Requests
-

features/steps/dashboard/shortcuts.rb

-class Spinach::Features::DashboardShortcuts < Spinach::FeatureSteps
-  include SharedAuthentication
-  include SharedPaths
-  include SharedProject
-  include SharedSidebarActiveTab
-  include SharedShortcuts
-end

spec/features/dashboard/shortcuts_spec.rb

+require 'spec_helper'
+
+feature 'Dashboard shortcuts', feature: true, js: true do
+  before do
+    login_as :user
+    visit dashboard_projects_path
+  end
+
+  scenario 'Navigate to tabs' do
+    find('body').native.send_key('g')
+    find('body').native.send_key('p')
+
+    ensure_active_main_tab('Projects')
+
+    find('body').native.send_key('g')
+    find('body').native.send_key('i')
+
+    ensure_active_main_tab('Issues')
+
+    find('body').native.send_key('g')
+    find('body').native.send_key('m')
+
+    ensure_active_main_tab('Merge Requests')
+  end
+
+  def ensure_active_main_tab(content)
+    expect(find('.nav-sidebar li.active')).to have_content(content)
+  end
+end