log4j appender implemented as JUnit rule

[dmzaytsev]

log4j appender implemented as JUnit rule

I use mocked log4j appender in the unit test and check log output like this

Mockito.verify(appender)
   .doAppend(
       Matchers.argThat(
          new ArgumentMatcher<LoggingEvent>() {
              @Override
              public boolean matches(final Object argument) {
                  return ((LoggingEvent) argument)
                          .getRenderedMessage()
                          .matches("^.*accept.*$");

I got comment from my reviewer that "matching looks a bit glibly".

He suggest to create custom log4j appender as JUnit rule see more

[yegor256]

@dmzaytsev again, the description of the ticket sounds like a task, but it should be a bug. You should say what is broken and it's up to "us" how to solve it. You should say that you miss something in the project, or something doesn't work as you expect, etc.

[dmzaytsev]

This is no longer necessary