public class UserTest extends DBTestCase {
    private IDatabaseTester databaseTester;

    public UserTest(String testName) throws Exception {
        super(testName);

        System.setProperty(PropertiesBasedJdbcDatabaseTester.DBUNIT_DRIVER_CLASS,
                "com.mysql.jdbc.Driver");
        System.setProperty(PropertiesBasedJdbcDatabaseTester.DBUNIT_CONNECTION_URL,
                "jdbc:mysql://localhost:3632");
        System.setProperty(PropertiesBasedJdbcDatabaseTester.DBUNIT_USERNAME,
                "root");
        System.setProperty(PropertiesBasedJdbcDatabaseTester.DBUNIT_PASSWORD,
                "root");
        System.setProperty(PropertiesBasedJdbcDatabaseTester.DBUNIT_SCHEMA,
                "sqllab");
    }

    @Override
    protected void setUp() throws Exception
    {
        databaseTester = new JdbcDatabaseTester("com.mysql.jdbc.Driver",
                "jdbc:mysql://localhost:3632/sqllab", "root", "root");

        databaseTester.setDataSet(getDataSet());
        databaseTester.onSetup();
    }


    @Override
    protected IDataSet getDataSet() throws Exception {
//        InputStream is = getClass().getResourceAsStream("/user.xml");
        FileInputStream is = new FileInputStream("src/test/resources/user.xml");
        return new FlatXmlDataSetBuilder().build(is);

    }

    public void test() throws Exception {

//        UserService userService = new UserService();
//        userService.delete();

        IDataSet databaseDataSet = getConnection().createDataSet();
        ITable actualTable = databaseDataSet.getTable("user");

        System.out.println(actualTable);

        IDataSet expectedDataSet = new FlatXmlDataSet(getClass().getResourceAsStream("/user.xml"));

        ITable expectedTable = expectedDataSet.getTable("user");
        ITable filteredActualTable = DefaultColumnFilter.includedColumnsTable(actualTable, expectedTable.getTableMetaData().getColumns());

        Assertion.assertEquals(expectedTable, filteredActualTable);
    }

}

return new FlatXmlDataSetBuilder().build(is);

java.lang.NullPointerException
    at org.dbunit.dataset.xml.FlatXmlProducer.isNewTable(FlatXmlProducer.java:255)
    at org.dbunit.dataset.xml.FlatXmlProducer.startElement(FlatXmlProducer.java:429)
    at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
    at java.xml/com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:746)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1395)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDriver.scanRootElementHook(XMLDocumentScannerImpl.java:1252)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3058)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:821)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:602)
    at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:532)
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:888)
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:824)
    at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
    at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:635)
    at org.dbunit.dataset.xml.FlatXmlProducer.produce(FlatXmlProducer.java:365)
    at org.dbunit.dataset.CachedDataSet.<init>(CachedDataSet.java:80)
    at org.dbunit.dataset.xml.FlatXmlDataSet.<init>(FlatXmlDataSet.java:110)
    at org.dbunit.dataset.xml.FlatXmlDataSetBuilder.buildInternal(FlatXmlDataSetBuilder.java:264)
    at org.dbunit.dataset.xml.FlatXmlDataSetBuilder.build(FlatXmlDataSetBuilder.java:147)
    at com.company.ppp.UserTest.getDataSet(UserTest.java:48)
    at com.company.ppp.UserTest.setUp(UserTest.java:39)