feat: Slack link unfurling (#7940)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

spec/jobs/slack_unfurl_job_spec.rb

@@ -0,0 +1,38 @@
+require 'rails_helper'
+
+RSpec.describe SlackUnfurlJob do
+  subject(:job) { described_class.perform_later(params: link_shared, integration_hook: hook) }
+
+  let(:account) { create(:account) }
+  let(:hook) { create(:integrations_hook, account: account) }
+  let(:inbox) { create(:inbox, account: account) }
+  let!(:conversation) { create(:conversation, inbox: inbox) }
+
+  let(:link_shared) do
+    {
+      team_id: 'TLST3048H',
+      api_app_id: 'A012S5UETV4',
+      event: link_shared_event.merge(links: [{
+                                       url: "https://qa.chatwoot.com/app/accounts/1/conversations/#{conversation.display_id}",
+                                       domain: 'qa.chatwoot.com'
+                                     }]),
+      type: 'event_callback',
+      event_time: 1_588_623_033
+    }
+  end
+
+  it 'enqueues the job' do
+    expect { job }.to have_enqueued_job(described_class)
+      .on_queue('low')
+  end
+
+  it 'calls the SlackLinkUnfurlService' do
+    slack_link_unfurl_service = instance_double(Integrations::Slack::SlackLinkUnfurlService)
+
+    expect(Integrations::Slack::SlackLinkUnfurlService).to receive(:new)
+      .with(params: link_shared, integration_hook: hook)
+      .and_return(slack_link_unfurl_service)
+    expect(slack_link_unfurl_service).to receive(:perform)
+    described_class.perform_now(link_shared, hook)
+  end
+end