@Test
  public void testMemberTimeout() {
    Properties props = new Properties();
    int memberTimeout = 100;
    props.put(MEMBER_TIMEOUT, String.valueOf(memberTimeout));
    props.put(MCAST_PORT, "0");

    DistributionConfig config = createSystem(props).getOriginalConfig();
    assertThat(memberTimeout).isEqualTo(config.getMemberTimeout());
  }
Tests that the default values of properties are what we expect
geode-core/src/integrationTest/java/org/apache/geode/distributed/internal/InternalDistributedSystemIntegrationTest.java