@Before
  public void setUp() {
    vmCaptor = ArgumentCaptor.forClass(VM.class);
    beforeVmCount = getVMCount();
    vm = getVM(0);
  }
Distributed tests for {@link VMEventListener} callbacks.
geode-dunit/src/distributedTest/java/org/apache/geode/test/dunit/rules/tests/VmEventListenerDistributedTest.java