module SessionsHelper

  def sign_in(user = :user)
    case user
    when User
      sign_in_as_user(user)
    when Symbol
      sign_in_as_user(create(:user))
    else
      raise ArgumentError, "Invalid argument user: #{user}"
    end
  end

  def sign_in_as_user(user)
    clear_cookies!
    visit root_path
    within "#sign-in-form" do
      fill_in "Email", with: user.email
      fill_in "Password", with: user.password.presence || 'password'
      click_button "Sign in"
    end
  end

end