@Test
  public void testInvokeNamedLambdaAsync() throws Exception {
    assertThat(vm0.invokeAsync("getId", () -> DUnitEnv.get().getId()).getResult(), is(0));
  }
This class tests the basic functionality of the distributed unit test framework.
geode-dunit/src/distributedTest/java/org/apache/geode/test/dunit/tests/BasicDistributedTest.java