Feature: Allow staff to change user emails (#7074)

* Admin: Show unconfirmed email address on account page

* Admin: Allow staff to change user email addresses

* ActionLog: On change_email, log current email address and new unconfirmed email address

spec/controllers/admin/change_email_controller_spec.rb

@@ -0,0 +1,47 @@
+require 'rails_helper'
+
+RSpec.describe Admin::ChangeEmailsController, type: :controller do
+  render_views
+
+  let(:admin) { Fabricate(:user, admin: true) }
+
+  before do
+    sign_in admin
+  end
+
+  describe "GET #show" do
+    it "returns http success" do
+      account = Fabricate(:account)
+      user = Fabricate(:user, account: account)
+
+      get :show, params: { account_id: account.id }
+
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe "GET #update" do
+    before do
+      allow(UserMailer).to receive(:confirmation_instructions).and_return(double('email', deliver_later: nil))
+    end
+
+    it "returns http success" do
+      account = Fabricate(:account)
+      user = Fabricate(:user, account: account)
+
+      previous_email = user.email
+
+      post :update, params: { account_id: account.id, user: { unconfirmed_email: 'test@example.com' } }
+
+      user.reload
+
+      expect(user.email).to eq previous_email
+      expect(user.unconfirmed_email).to eq 'test@example.com'
+      expect(user.confirmation_token).not_to be_nil
+
+      expect(UserMailer).to have_received(:confirmation_instructions).with(user, user.confirmation_token, { to: 'test@example.com' })
+
+      expect(response).to redirect_to(admin_account_path(account.id))
+    end
+  end
+end