Improve CaptureLogEvents test logger

[keithrbennett]

Environment

Ruby version independent
Semantic Logger version 4.12.0

Requested Improvement

The CaptureLogEvents logger for testing is useful, but when I tried to access the events array before any log messages were logged, it was not yet initialized. So I had to do an additional check for nil when accessing the events array.

I suggest initializing the events array in the constructor rather than lazily initializing it in the log method. This way, callers can be guaranteed to get the array whether or not any messages have been logged yet.

Also, in my use of this logger, I found it useful to be able to clear the array of events. I recommend adding a clear method that does this.

[reidmorrison]

Merged the pull request