Refactor ejabberd API integration

spec/services/ejabberd_manager/exchange_contacts_spec.rb

@@ -0,0 +1,22 @@
+require 'rails_helper'
+require 'webmock/rspec'
+
+RSpec.describe EjabberdManager::ExchangeContacts, type: :model do
+  let(:user)  { create :user, cn: "willherschel", ou: "kosmos.org" }
+  let(:guest) { create :user, cn: "isaacnewton", ou: "kosmos.org",
+                              id: 2, email: "hotapple42@eol.com" }
+
+  before do
+    stub_request(:post, "http://xmpp.example.com/api/add_rosteritem")
+      .to_return(status: 200, body: "", headers: {})
+    allow_any_instance_of(User).to receive(:services_enabled).and_return(["ejabberd"])
+    described_class.call(inviter: user, invitee: guest)
+  end
+
+  it "posts add_rosteritem commands to the ejabberd API" do
+    expect(WebMock).to have_requested(:post, "http://xmpp.example.com/api/add_rosteritem")
+      .with { |req| req.body == '{"localuser":"isaacnewton","localhost":"kosmos.org","user":"willherschel","host":"kosmos.org","nick":"willherschel","group":"Buddies","subs":"both"}' }
+    expect(WebMock).to have_requested(:post, "http://xmpp.example.com/api/add_rosteritem")
+      .with { |req| req.body == '{"localuser":"willherschel","localhost":"kosmos.org","user":"isaacnewton","host":"kosmos.org","nick":"isaacnewton","group":"Buddies","subs":"both"}' }
+  end
+end