dataSource.setValidConnectionChecker(null);
dataSource.setValidConnectionCheckerClassName(null);
Assert.assertEquals(null, dataSource.getValidConnectionChecker());
dataSource.addConnectionProperty("user", "ljw");
Assert.assertEquals(1, dataSource.getConnectProperties().size());
Assert.assertEquals(0, dataSource.getConnectionInitSqls().size());
dataSource.setConnectionInitSqls(Arrays.<Object> asList("SELECT 1", null, ""));
Assert.assertEquals(1, dataSource.getConnectionInitSqls().size());