private int readPidFileWithValidation() {
    int pid = readPidFile(getPidFile());
    assertThat(pid).isGreaterThan(0);
    assertThat(isProcessAlive(pid)).isTrue();
    return pid;
  }
Abstract base class for integration tests of both {@link LocatorLauncher} and
{@link ServerLauncher}.

@since GemFire 8.0
geode-core/src/integrationTest/java/org/apache/geode/distributed/LauncherIntegrationTestCase.java