added follow user spec

spec/features/users/follow_user_spec.rb

@@ -0,0 +1,28 @@
+include Warden::Test::Helpers
+Warden.test_mode!
+
+feature "User profile page", :devise do
+
+  after :each do
+    Warden.test_reset!
+  end
+
+  scenario "user gets followed", js: true do
+    me = FactoryGirl.create(:user)
+    other = FactoryGirl.create(:user)
+
+    login_as me, scope: :user
+    visit show_user_profile_path(other.screen_name)
+    page.driver.render Rails.root.join("tmp/#{Time.now.to_i}_1.png"), full: true
+
+    click_button "Follow"
+    wait_for_ajax
+    page.driver.render Rails.root.join("tmp/#{Time.now.to_i}_2.png"), full: true
+
+    expect(page).to have_text("FOLLOWING")
+
+    click_link 'Followers'
+    page.driver.render Rails.root.join("tmp/#{Time.now.to_i}_3.png"), full: true
+    expect(page).to have_text(me.screen_name)
+  end
+end