AbstractConnectionStrategy implements ConnectionStrategy,Serializable { public ConnectionHandle pollConnection(){ return null; }  Connection getConnection(); ConnectionHandle pollConnection(); void cleanupConnection(ConnectionHandle oldHandle,
			ConnectionHandle newHandle);  }
@Test public void testCoverage() { @SuppressWarnings("serial") class X extends AbstractConnectionStrategy{ public void terminateAllConnections() { } protected Connection getConnectionInternal() throws SQLException { return null; } } assertNull(new X().pollConnection()); }