@Test
  public void testOverflowUpdatedValue() {
    IntStream.range(0, MAX_ENTRIES + 1).forEach((i) -> region.put(i, "value"));

    region.put(0, "newValue");
    assertEquals("newValue", region.get(0));

    // Iterate over a bunch of stuff to cause the updated entry to be
    // overflowed
    IntStream.range(0, MAX_ENTRIES + 1).forEach((i) -> region.get(i));

    // Make sure that the updated value got written to disk
    assertEquals("newValue", region.get(0));
  }
Tests that the updated value gets overflowed
geode-core/src/integrationTest/java/org/apache/geode/cache30/DiskRegionIntegrationTest.java