@Test
  public void logFileContainsBannerOnlyOnce() {
    LogFileAssert.assertThat(getLogFile()).containsOnlyOnce(displayValues());
  }
Integration tests of logging with {@link ServerLauncher}.
geode-core/src/integrationTest/java/org/apache/geode/logging/internal/api/LoggingWithServerLauncherIntegrationTest.java