Add a confirmation screen when suspending a domain (#25144)

spec/lib/admin/metrics/measure/instance_follows_measure_spec.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Admin::Metrics::Measure::InstanceFollowsMeasure do
+  subject(:measure) { described_class.new(start_at, end_at, params) }
+
+  let(:domain) { 'example.com' }
+
+  let(:start_at) { 2.days.ago }
+  let(:end_at)   { Time.now.utc }
+
+  let(:params) { ActionController::Parameters.new(domain: domain) }
+
+  before do
+    local_account = Fabricate(:account)
+
+    local_account.follow!(Fabricate(:account, domain: domain))
+    local_account.follow!(Fabricate(:account, domain: domain))
+    Fabricate(:account, domain: domain)
+
+    local_account.follow!(Fabricate(:account, domain: "foo.#{domain}"))
+    local_account.follow!(Fabricate(:account, domain: "foo.#{domain}"))
+    Fabricate(:account, domain: "bar.#{domain}")
+  end
+
+  describe 'total' do
+    context 'without include_subdomains' do
+      it 'returns the expected number of accounts' do
+        expect(measure.total).to eq 2
+      end
+    end
+
+    context 'with include_subdomains' do
+      let(:params) { ActionController::Parameters.new(domain: domain, include_subdomains: 'true') }
+
+      it 'returns the expected number of accounts' do
+        expect(measure.total).to eq 4
+      end
+    end
+  end
+end