Add SystemHelpers file to simplify system tests

Author: Oli0li

spec/rails_helper.rb

@@ -68,4 +68,6 @@
   config.filter_rails_from_backtrace!
   # arbitrary gems may also be filtered via:
   # config.filter_gems_from_backtrace("gem name")
+
+  config.include SystemHelpers, type: :system
 end

spec/support/system_helpers.rb

@@ -0,0 +1,9 @@
+module SystemHelpers
+  def login_as(user)
+    visit root_path
+    click_link("Sign In")
+    fill_in "email", with: user.email
+    fill_in "password", with: user.password
+    click_button("Sign in")
+  end
+end