Add service for creating invites

spec/services/create_invitations_spec.rb

@@ -0,0 +1,40 @@
+require 'rails_helper'
+
+RSpec.describe CreateInvitations, type: :model do
+  include ActiveJob::TestHelper
+
+  let(:user) { create :user }
+
+  describe "#call" do
+    before do
+      CreateInvitations.call(user: user, amount: 5)
+    end
+
+    after(:each) { clear_enqueued_jobs }
+
+    it "creates the right amount of invitations for the given user" do
+      expect(user.invitations.count).to eq(5)
+    end
+
+    it "sends an email notification to the user" do
+      expect(enqueued_jobs.size).to eq(1)
+      expect(enqueued_jobs.first["job_class"]).to eq("ActionMailer::MailDeliveryJob")
+      args = enqueued_jobs.first['arguments']
+      expect(args[0]).to eq("NotificationMailer")
+      expect(args[1]).to eq("new_invitations_available")
+      expect(args[3]["params"]["user"]["_aj_globalid"]).to eq("gid://akkounts/User/1")
+    end
+  end
+
+  describe "#call with notification disabled" do
+    before do
+      CreateInvitations.call(user: user, amount: 3, notify: false)
+    end
+
+    after(:each) { clear_enqueued_jobs }
+
+    it "does not send an email notification to the user" do
+      expect(enqueued_jobs.size).to eq(0)
+    end
+  end
+end