@Test
  public void testConstructor2() {
    try {
      new CustomEntryConcurrentHashMap(1, 0, -1);
      shouldThrow();
    } catch (IllegalArgumentException ignored) {
    }
  }
Cannot create with negative concurrency level
geode-core/src/integrationTest/java/org/apache/geode/internal/util/concurrent/cm/ConcurrentHashMapJUnitTest.java