@Test
  public void testSimplePut() {
    ObjIdMap map = new ObjIdMap();
    int key = 4;
    Object value = key;
    map.put(key, value);
    assertSame(value, map.get(key));
  }
This class tests the functionality of the {@link ObjIdMap} class.
geode-core/src/test/java/org/apache/geode/internal/ObjIdMapJUnitTest.java