@Test
  public void mainLogWriterAppenderLogEventsIsEmptyByDefault() {
    assertThat(mainLogWriterAppender.getLogEvents()).isEmpty();
  }
Integration tests for main and security {@link LogWriterAppender}s, loggers, and
{@link ConfigurationProperties#LOG_FILE} and {@link ConfigurationProperties#SECURITY_LOG_FILE}.
geode-log4j/src/integrationTest/java/org/apache/geode/logging/log4j/internal/impl/BothLogWriterAppendersIntegrationTest.java