title: IntelliJ: How to set log levels for tests
body: <p>I have a problem with test console output in IntelliJ 2016.
  When I run JUnit tests via IntelliJ, the console window is flooded with enormous amounts of log lines, for example</p>
  
  <pre><code>DEBUG reactor.ipc ....
  DEBUG io.netty.buffer.ByteBufUtil ....
  </code></pre>
  
  <p>It's a simple Spring-Boot application which uses the default logging - I think it's slf4j.
  I tried setting </p>
  
  <pre><code>logging.level.reactor.ipc=WARN
  </code></pre>
  
  <p>in my <code>src/main/resources/application.properties</code> and also setting </p>
  
  <p><code>-Dlogging.level.root=WARN</code> on the RunConfig's VM arguments, but neither has any effect on the log output.
  What is the correct place to configure logging verbosity when executing Tests from Intellij?</p>