Add spec for AccountableConcern#log_action (#9559)

spec/controllers/concerns/accountable_concern_spec.rb

+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe AccountableConcern do
+  class Hoge
+    include AccountableConcern
+    attr_reader :current_account
+
+    def initialize(current_account)
+      @current_account = current_account
+    end
+  end
+
+  let(:user)   { Fabricate(:user, account: Fabricate(:account)) }
+  let(:target) { Fabricate(:user, account: Fabricate(:account)) }
+  let(:hoge)   { Hoge.new(user.account) }
+
+  describe '#log_action' do
+    it 'creates Admin::ActionLog' do
+      expect do
+        hoge.log_action(:create, target.account)
+      end.to change { Admin::ActionLog.count }.by(1)
+    end
+  end
+end