Github user ProjectMoon commented on the pull request: https://github.com/apache/cloudstack/pull/1373#issuecomment-176208728 I'm not the original author of this work, but I think it was just because a class for testing was needed. Looking at it now I'm not really sure why it can't just be the regular `UsageEventDao` with `@Mock`. I will try to find out the intention behind it, and then remove the class if it's not needed.
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