public TestObjectPool(String testName) 
{
        super(testName);
}

 abstract protected Object getNthObject(int n)
Return what we expect to be the nth
object (zero indexed) created by the _pool.

 abstract protected ObjectPool makeEmptyPool(int mincapacity)
Create an ObjectPool  instance
that can contain at least mincapacity
idle and active objects, or
throw IllegalArgumentException 
if such a pool cannot be created.

 public  void setUp() throws Exception 
{

}

 public  void tearDown() throws Exception 
{
        _pool = null;
}

 public  void testBaseAddObject() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        try {
            assertEquals(0,_pool.getNumIdle());
            assertEquals(0,_pool.getNumActive());
            _pool.addObject();
            assertEquals(1,_pool.getNumIdle());
            assertEquals(0,_pool.getNumActive());
            Object obj = _pool.borrowObject();
            assertEquals(getNthObject(0),obj);
            assertEquals(0,_pool.getNumIdle());
            assertEquals(1,_pool.getNumActive());
            _pool.returnObject(obj);
            assertEquals(1,_pool.getNumIdle());
            assertEquals(0,_pool.getNumActive());
        } catch(UnsupportedOperationException e) {
            return; // skip this test if one of those calls is unsupported
        }
}

 public  void testBaseBorrow() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        assertEquals(getNthObject(0),_pool.borrowObject());
        assertEquals(getNthObject(1),_pool.borrowObject());
        assertEquals(getNthObject(2),_pool.borrowObject());
}

 public  void testBaseBorrowReturn() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        Object obj0 = _pool.borrowObject();
        assertEquals(getNthObject(0),obj0);
        Object obj1 = _pool.borrowObject();
        assertEquals(getNthObject(1),obj1);
        Object obj2 = _pool.borrowObject();
        assertEquals(getNthObject(2),obj2);
        _pool.returnObject(obj2);
        obj2 = _pool.borrowObject();
        assertEquals(getNthObject(2),obj2);
        _pool.returnObject(obj1);
        obj1 = _pool.borrowObject();
        assertEquals(getNthObject(1),obj1);
        _pool.returnObject(obj0);
        _pool.returnObject(obj2);
        obj2 = _pool.borrowObject();
        assertEquals(getNthObject(2),obj2);
        obj0 = _pool.borrowObject();
        assertEquals(getNthObject(0),obj0);
}

 public  void testBaseCantCloseTwice() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        Object obj = _pool.borrowObject();
        _pool.returnObject(obj);
        _pool.close();
        try {
            _pool.close();
            fail("Expected IllegalStateException");
        } catch(IllegalStateException e) {
            // expected
        }
}

 public  void testBaseClear() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        assertEquals(0,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        Object obj0 = _pool.borrowObject();
        Object obj1 = _pool.borrowObject();
        assertEquals(2,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        _pool.returnObject(obj1);
        _pool.returnObject(obj0);
        assertEquals(0,_pool.getNumActive());
        assertEquals(2,_pool.getNumIdle());
        _pool.clear();
        assertEquals(0,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        Object obj2 = _pool.borrowObject();
        assertEquals(getNthObject(2),obj2);
}

 public  void testBaseClosePool() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        Object obj = _pool.borrowObject();
        _pool.returnObject(obj);
        _pool.close();
        try {
            _pool.borrowObject();
            fail("Expected IllegalStateException");
        } catch(IllegalStateException e) {
            // expected
        }
}

 public  void testBaseInvalidateObject() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        assertEquals(0,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        Object obj0 = _pool.borrowObject();
        Object obj1 = _pool.borrowObject();
        assertEquals(2,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        _pool.invalidateObject(obj0);
        assertEquals(1,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        _pool.invalidateObject(obj1);
        assertEquals(0,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
}

 public  void testBaseNumActiveNumIdle() throws Exception 
{
        try {
            _pool = makeEmptyPool(3);
        } catch(IllegalArgumentException e) {
            return; // skip this test if unsupported
        }
        assertEquals(0,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        Object obj0 = _pool.borrowObject();
        assertEquals(1,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        Object obj1 = _pool.borrowObject();
        assertEquals(2,_pool.getNumActive());
        assertEquals(0,_pool.getNumIdle());
        _pool.returnObject(obj1);
        assertEquals(1,_pool.getNumActive());
        assertEquals(1,_pool.getNumIdle());
        _pool.returnObject(obj0);
        assertEquals(0,_pool.getNumActive());
        assertEquals(2,_pool.getNumIdle());
}