Create new transaction log table to track user conversions

test/fixtures/transaction_log_items.yml

@@ -0,0 +1,9 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/Fixtures.html
+
+one:
+  category: MyString
+  data: MyText
+
+two:
+  category: MyString
+  data: MyText

test/unit/transaction_log_item_test.rb

@@ -0,0 +1,28 @@
+require 'test_helper'
+
+class TransactionLogItemTest < ActiveSupport::TestCase
+  setup do
+    @user = FactoryGirl.create(:user)
+  end
+
+  context "Promoting a user" do
+    should "create a new line item in the transaction log" do
+      @user.level = User::Levels::GOLD
+      assert_difference("TransactionLogItem.count", 1) do
+        TransactionLogItem.record_account_upgrade(@user)
+      end
+
+      item = TransactionLogItem.last
+      assert_equal(@user.id, item.user_id)
+      assert_equal("account_upgrade_basic_to_gold", item.category)
+    end
+  end
+
+  context "Viewing the account upgrade page" do
+    should "create a new line item in the transaction log" do
+      assert_difference("TransactionLogItem.count", 1) do
+        TransactionLogItem.record_account_upgrade_view(@user, "xxx")
+      end
+    end
+  end
+end