@Test
  public void testGetCache() throws CacheException {
    String name = getUniqueName();
    Region<Object, Object> region = createRegion(name);
    assertSame(getCache(), region.getCache());
  }
Tests the {@link Region#getCache} method (for what it's worth)
geode-dunit/src/main/java/org/apache/geode/cache30/RegionTestCase.java