Examples of org.apache.commons.digester3.RuleTestCase

org.apache.commons.digester3.Digester

Test Case for the Digester class. These tests perform parsing of XML documents to exercise the built-in rules.
@author Craig R. McClanahan @author Janek Bogucki @version $Revision: 1102402 $ $Date: 2011-05-12 20:03:26 +0200 (Thu, 12 May 2011) $

        throws Exception
    {
        // * tests that when a PluginCreateRule is defined with a default
        // class, that the default class is instantiated when no class
        // or id is specified in the xml file.
        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginCreateRule pcr = new PluginCreateRule( Widget.class, TextLabel.class );
        digester.addRule( "root/widget", pcr );
        digester.addSetNext( "root/widget", "addChild" );


        Container root = new Container();
        digester.push( root );


        try
        {
            digester.parse( Utils.getInputStream( this, "test2.xml" ) );
        }
        catch ( Exception e )
        {
            throw e;
        }

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    public void testDefaultPlugins2()
        throws Exception
    {
        // * tests that when there is no default plugin, it is an error
        // not to have one of plugin-class or plugin-id specified
        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginCreateRule pcr = new PluginCreateRule( Widget.class );
        digester.addRule( "root/widget", pcr );
        digester.addSetNext( "root/widget", "addChild" );


        Container root = new Container();
        digester.push( root );


        Exception exception = null;
        Log oldLog = digester.getLogger();
        try
        {
            digester.setLogger( new NoOpLog() );
            digester.parse( Utils.getInputStream( this, "test2.xml" ) );
        }
        catch ( Exception e )
        {
            exception = e;
        }
        finally
        {
            digester.setLogger( oldLog );
        }


        assertNotNull( exception );
        assertEquals( SAXParseException.class, exception.getClass() );
        assertEquals( PluginInvalidInputException.class, ( (SAXParseException) exception ).getException().getClass() );

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     */
    @Before
    public void setUp()
    {


        digester = new Digester();
        digester.setRules( new RulesBase() );


    }

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    public void testDefaultPlugins3()
        throws Exception
    {
        // * tests that the default plugin must implement or extend the
        // plugin base class.
        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginCreateRule pcr = new PluginCreateRule( Widget.class, Object.class );
        digester.addRule( "root/widget", pcr );
        digester.addSetNext( "root/widget", "addChild" );


        Container root = new Container();
        digester.push( root );


        Exception exception = null;
        Log oldLog = digester.getLogger();
        try
        {
            digester.setLogger( new NoOpLog() );
            digester.parse( Utils.getInputStream( this, "test2.xml" ) );
        }
        catch ( Exception e )
        {
            exception = e;
        }
        finally
        {
            digester.setLogger( oldLog );
        }


        assertNotNull( exception );
        assertEquals( SAXParseException.class, exception.getClass() );
        assertEquals( PluginConfigurationException.class, ( (SAXParseException) exception ).getException().getClass() );

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                this.body = text;
            }
        }


        TestSubRule tsr = new TestSubRule();
        Digester digester = new Digester();
        digester.addRule( "alpha/beta", tsr );


        // it's not easy to transform dirty harry into the mighty circus - but let's give it a try
        String xml =
            "<?xml version='1.0'?><alpha><beta forname='Dirty' surname='Harry'>Do you feel luck punk?</beta></alpha>";
        InputSource in = new InputSource( new StringReader( xml ) );


        digester.parse( in );


        assertEquals( "Unsubstituted body text", "Do you feel luck punk?", tsr.body );
        assertEquals( "Unsubstituted number of attributes", 2, tsr.attributes.getLength() );
        assertEquals( "Unsubstituted forname attribute value", "Dirty", tsr.attributes.getValue( "forname" ) );
        assertEquals( "Unsubstituted surname attribute value", "Harry", tsr.attributes.getValue( "surname" ) );


        digester.setSubstitutor( new Substitutor()
        {
            @Override
            public Attributes substitute( Attributes attributes )
            {
                AttributesImpl results = new AttributesImpl();
                results.addAttribute( "", "python", "python", "CDATA", "Cleese" );
                return results;
            }


            @Override
            public String substitute( String bodyText )
            {
                return "And now for something completely different...";
            }
        } );


        // now transform into the full monty
        in = new InputSource( new StringReader( xml ) );
        digester.parse( in );


        assertEquals( "Substituted body text", "And now for something completely different...", tsr.body );
        assertEquals( "Substituted number of attributes", 1, tsr.attributes.getLength() );
        assertEquals( "Substituted python attribute value", "Cleese", tsr.attributes.getValue( "", "python" ) );
    }

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    public void testNamedStackPushPeekPop()
        throws Exception
    {
        BigDecimal archimedesAveragePi = new BigDecimal( "3.1418" );
        String testStackName = "org.apache.commons.digester3.tests.testNamedStackPushPeekPop";
        Digester digester = new Digester();
        assertTrue( "Stack starts empty:", digester.isEmpty( testStackName ) );
        digester.push( testStackName, archimedesAveragePi );
        assertEquals( "Peeked value:", archimedesAveragePi, digester.peek( testStackName ) );
        assertEquals( "Popped value:", archimedesAveragePi, digester.pop( testStackName ) );
        assertTrue( "Stack ends empty:", digester.isEmpty( testStackName ) );


        digester.push( testStackName, "1" );
        digester.push( testStackName, "2" );
        digester.push( testStackName, "3" );


        assertEquals( "Peek#1", "1", digester.peek( testStackName, 2 ) );
        assertEquals( "Peek#2", "2", digester.peek( testStackName, 1 ) );
        assertEquals( "Peek#3", "3", digester.peek( testStackName, 0 ) );
        assertEquals( "Peek#3a", "3", digester.peek( testStackName ) );


        try
        {
            // peek beyond stack
            digester.peek( testStackName, 3 );
            fail( "Peek#4 failed to throw an exception." );
        }
        catch ( EmptyStackException ex )
        {
            // ok, expected
        }


        try
        {
            // peek a nonexistent named stack
            digester.peek( "no.such.stack", 0 );
            fail( "Peeking a non-existent stack failed to throw an exception." );
        }
        catch ( EmptyStackException ex )
        {
            // ok, expected

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    @Test
    public void testNamedIndependence()
    {
        String testStackOneName = "org.apache.commons.digester3.tests.testNamedIndependenceOne";
        String testStackTwoName = "org.apache.commons.digester3.tests.testNamedIndependenceTwo";
        Digester digester = new Digester();
        digester.push( testStackOneName, "Tweedledum" );
        digester.push( testStackTwoName, "Tweedledee" );
        assertEquals( "Popped value one:", "Tweedledum", digester.pop( testStackOneName ) );
        assertEquals( "Popped value two:", "Tweedledee", digester.pop( testStackTwoName ) );
    }

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    /** Tests popping named stack not yet pushed */
    @Test
    public void testPopNamedStackNotPushed()
    {
        String testStackName = "org.apache.commons.digester3.tests.testPopNamedStackNotPushed";
        Digester digester = new Digester();
        try
        {


            digester.pop( testStackName );
            fail( "Expected an EmptyStackException" );


        }
        catch ( EmptyStackException e )
        {
            // expected
        }


        try
        {


            digester.peek( testStackName );
            fail( "Expected an EmptyStackException" );


        }
        catch ( EmptyStackException e )
        {

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    /** Tests for isEmpty */
    @Test
    public void testNamedStackIsEmpty()
    {
        String testStackName = "org.apache.commons.digester3.tests.testNamedStackIsEmpty";
        Digester digester = new Digester();
        assertTrue( "A named stack that has no object pushed onto it yet should be empty",
                    digester.isEmpty( testStackName ) );


        digester.push( testStackName, "Some test value" );
        assertFalse( "A named stack that has an object pushed onto it should be not empty",
                     digester.isEmpty( testStackName ) );


        digester.peek( testStackName );
        assertFalse( "Peek should not effect whether the stack is empty", digester.isEmpty( testStackName ) );


        digester.pop( testStackName );
        assertTrue( "A named stack that has it's last object popped is empty", digester.isEmpty( testStackName ) );
    }

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     */
    @Test
    public void testGetRoot()
        throws Exception
    {
        Digester digester = new Digester();
        digester.addRule( "root", new ObjectCreateRule( TestBean.class ) );


        String xml = "<root/>";
        InputSource in = new InputSource( new StringReader( xml ) );


        digester.parse( in );


        Object root = digester.getRoot();
        assertNotNull( "root object not retrieved", root );
        assertTrue( "root object not a TestRule instance", ( root instanceof TestBean ) );
    }

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