adds admin layout and access links [#163]

spec/features/admin_spec.rb

@@ -31,4 +31,50 @@ feature 'Admin' do
     expect(page).to_not have_content "not authorized"
   end
 
+  scenario "Admin access links" do
+    create(:administrator, user: user)
+
+    login_as(user)
+    visit root_path
+
+    expect(page).to have_link('Administration')
+    expect(page).to_not have_link('Moderator')
+  end
+
+  scenario "Moderation access links" do
+    create(:moderator, user: user)
+
+    login_as(user)
+    visit root_path
+
+    expect(page).to have_link('Moderation')
+    expect(page).to_not have_link('Administration')
+  end
+
+  scenario 'Admin dashboard' do
+    create(:administrator, user: user)
+
+    login_as(user)
+    visit root_path
+
+    click_link 'Administration'
+
+    expect(current_path).to eq(admin_root_path)
+    expect(page).to have_css('#admin_menu')
+    expect(page).to_not have_css('#moderation_menu')
+  end
+
+  scenario 'Moderation dashboard' do
+    create(:moderator, user: user)
+
+    login_as(user)
+    visit root_path
+
+    click_link 'Moderation'
+
+    expect(current_path).to eq(moderation_root_path)
+    expect(page).to have_css('#moderation_menu')
+    expect(page).to_not have_css('#admin_menu')
+  end
+
 end