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Java example source code file (XmlDecoderTest.java)

This example Java source code file (XmlDecoderTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

after, alba, before, cdata, doctype, embeddedchannel, exception, object, string, test, utf-8, xml1, xml3, xmldecodertest

The XmlDecoderTest.java Java example source code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.codec.xml;

import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.CharsetUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.core.IsNull.nullValue;

/**
 * Verifies the basic functionality of the {@link XmlDecoder}.
 * XML borrowed from <a href="http://www.studytrails.com/java/xml/woodstox/java-xml-woodstox-validation-xml-schema.jsp">
 * Woodstox : Validate against XML Schema</a>
 */
public class XmlDecoderTest {

    private static final String XML1 = "<?xml version=\"1.0\"?>" +
            "<!DOCTYPE employee SYSTEM \"employee.dtd\">" +
            "<?xml-stylesheet type=\"text/css\" href=\"netty.css\"?>" +
            "<?xml-test ?>" +
            "<employee xmlns:nettya=\"http://netty.io/netty/a\">" +
            "<nettya:id>±1\n" +
            "<name ";

    private static final String XML2 = "type=\"given\">Alba</name> ]]>" +
            "   <!-- namespaced -->" +
            "100</nettyb:salary>";

    private static final String XML3 = "<?xml version=\"1.1\" encoding=\"UTf-8\" standalone=\"yes\"?>";

    private static final String XML4 = "<netty>";

    private EmbeddedChannel channel;

    @Before
    public void setup() throws Exception {
        channel = new EmbeddedChannel(new XmlDecoder());
    }

    @After
    public void teardown() throws Exception {
        channel.finish();
    }

    /**
     * This test feeds basic XML and verifies the resulting messages
     */
    @Test
    public void shouldDecodeRequestWithSimpleXml() {
        Object temp;

        write(XML1);

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlDocumentStart.class));
        assertThat(((XmlDocumentStart) temp).version(), is("1.0"));
        assertThat(((XmlDocumentStart) temp).encoding(), is("UTF-8"));
        assertThat(((XmlDocumentStart) temp).standalone(), is(false));
        assertThat(((XmlDocumentStart) temp).encodingScheme(), is(nullValue()));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlDTD.class));
        assertThat(((XmlDTD) temp).text(), is("employee.dtd"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlProcessingInstruction.class));
        assertThat(((XmlProcessingInstruction) temp).target(), is("xml-stylesheet"));
        assertThat(((XmlProcessingInstruction) temp).data(), is("type=\"text/css\" href=\"netty.css\""));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlProcessingInstruction.class));
        assertThat(((XmlProcessingInstruction) temp).target(), is("xml-test"));
        assertThat(((XmlProcessingInstruction) temp).data(), is(""));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("employee"));
        assertThat(((XmlElementStart) temp).prefix(), is(""));
        assertThat(((XmlElementStart) temp).namespace(), is(""));
        assertThat(((XmlElementStart) temp).attributes().size(), is(0));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(1));
        assertThat(((XmlElementStart) temp).namespaces().get(0).prefix(), is("nettya"));
        assertThat(((XmlElementStart) temp).namespaces().get(0).uri(), is("http://netty.io/netty/a"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("id"));
        assertThat(((XmlElementStart) temp).prefix(), is("nettya"));
        assertThat(((XmlElementStart) temp).namespace(), is("http://netty.io/netty/a"));
        assertThat(((XmlElementStart) temp).attributes().size(), is(0));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlEntityReference.class));
        assertThat(((XmlEntityReference) temp).name(), is("plusmn"));
        assertThat(((XmlEntityReference) temp).text(), is(""));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCharacters.class));
        assertThat(((XmlCharacters) temp).data(), is("1"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("id"));
        assertThat(((XmlElementEnd) temp).prefix(), is("nettya"));
        assertThat(((XmlElementEnd) temp).namespace(), is("http://netty.io/netty/a"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCharacters.class));
        assertThat(((XmlCharacters) temp).data(), is("\n"));

        temp = channel.readInbound();
        assertThat(temp, nullValue());

        write(XML2);

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("name"));
        assertThat(((XmlElementStart) temp).prefix(), is(""));
        assertThat(((XmlElementStart) temp).namespace(), is(""));
        assertThat(((XmlElementStart) temp).attributes().size(), is(1));
        assertThat(((XmlElementStart) temp).attributes().get(0).name(), is("type"));
        assertThat(((XmlElementStart) temp).attributes().get(0).value(), is("given"));
        assertThat(((XmlElementStart) temp).attributes().get(0).prefix(), is(""));
        assertThat(((XmlElementStart) temp).attributes().get(0).namespace(), is(""));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCharacters.class));
        assertThat(((XmlCharacters) temp).data(), is("Alba"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("name"));
        assertThat(((XmlElementEnd) temp).prefix(), is(""));
        assertThat(((XmlElementEnd) temp).namespace(), is(""));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCdata.class));
        assertThat(((XmlCdata) temp).data(), is(" <some data >/> "));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCharacters.class));
        assertThat(((XmlCharacters) temp).data(), is("   "));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlComment.class));
        assertThat(((XmlComment) temp).data(), is(" namespaced "));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("salary"));
        assertThat(((XmlElementStart) temp).prefix(), is("nettyb"));
        assertThat(((XmlElementStart) temp).namespace(), is("http://netty.io/netty/b"));
        assertThat(((XmlElementStart) temp).attributes().size(), is(1));
        assertThat(((XmlElementStart) temp).attributes().get(0).name(), is("period"));
        assertThat(((XmlElementStart) temp).attributes().get(0).value(), is("weekly"));
        assertThat(((XmlElementStart) temp).attributes().get(0).prefix(), is("nettyb"));
        assertThat(((XmlElementStart) temp).attributes().get(0).namespace(), is("http://netty.io/netty/b"));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(1));
        assertThat(((XmlElementStart) temp).namespaces().get(0).prefix(), is("nettyb"));
        assertThat(((XmlElementStart) temp).namespaces().get(0).uri(), is("http://netty.io/netty/b"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlCharacters.class));
        assertThat(((XmlCharacters) temp).data(), is("100"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("salary"));
        assertThat(((XmlElementEnd) temp).prefix(), is("nettyb"));
        assertThat(((XmlElementEnd) temp).namespace(), is("http://netty.io/netty/b"));
        assertThat(((XmlElementEnd) temp).namespaces().size(), is(1));
        assertThat(((XmlElementEnd) temp).namespaces().get(0).prefix(), is("nettyb"));
        assertThat(((XmlElementEnd) temp).namespaces().get(0).uri(), is("http://netty.io/netty/b"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("last"));
        assertThat(((XmlElementStart) temp).prefix(), is(""));
        assertThat(((XmlElementStart) temp).namespace(), is(""));
        assertThat(((XmlElementStart) temp).attributes().size(), is(0));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("last"));
        assertThat(((XmlElementEnd) temp).prefix(), is(""));
        assertThat(((XmlElementEnd) temp).namespace(), is(""));
        assertThat(((XmlElementEnd) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("employee"));
        assertThat(((XmlElementEnd) temp).prefix(), is(""));
        assertThat(((XmlElementEnd) temp).namespace(), is(""));
        assertThat(((XmlElementEnd) temp).namespaces().size(), is(1));
        assertThat(((XmlElementEnd) temp).namespaces().get(0).prefix(), is("nettya"));
        assertThat(((XmlElementEnd) temp).namespaces().get(0).uri(), is("http://netty.io/netty/a"));

        temp = channel.readInbound();
        assertThat(temp, nullValue());
    }

    /**
     * This test checks for different attributes in XML header
     */
    @Test
    public void shouldDecodeXmlHeader() {
        Object temp;

        write(XML3);

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlDocumentStart.class));
        assertThat(((XmlDocumentStart) temp).version(), is("1.1"));
        assertThat(((XmlDocumentStart) temp).encoding(), is("UTF-8"));
        assertThat(((XmlDocumentStart) temp).standalone(), is(true));
        assertThat(((XmlDocumentStart) temp).encodingScheme(), is("UTF-8"));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("netty"));
        assertThat(((XmlElementStart) temp).prefix(), is(""));
        assertThat(((XmlElementStart) temp).namespace(), is(""));
        assertThat(((XmlElementStart) temp).attributes().size(), is(0));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("netty"));
        assertThat(((XmlElementEnd) temp).prefix(), is(""));
        assertThat(((XmlElementEnd) temp).namespace(), is(""));
        assertThat(((XmlElementEnd) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, nullValue());
    }

    /**
     * This test checks for no XML header
     */
    @Test
    public void shouldDecodeWithoutHeader() {
        Object temp;

        write(XML4);

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlDocumentStart.class));
        assertThat(((XmlDocumentStart) temp).version(), is(nullValue()));
        assertThat(((XmlDocumentStart) temp).encoding(), is("UTF-8"));
        assertThat(((XmlDocumentStart) temp).standalone(), is(false));
        assertThat(((XmlDocumentStart) temp).encodingScheme(), is(nullValue()));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementStart.class));
        assertThat(((XmlElementStart) temp).name(), is("netty"));
        assertThat(((XmlElementStart) temp).prefix(), is(""));
        assertThat(((XmlElementStart) temp).namespace(), is(""));
        assertThat(((XmlElementStart) temp).attributes().size(), is(0));
        assertThat(((XmlElementStart) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, instanceOf(XmlElementEnd.class));
        assertThat(((XmlElementEnd) temp).name(), is("netty"));
        assertThat(((XmlElementEnd) temp).prefix(), is(""));
        assertThat(((XmlElementEnd) temp).namespace(), is(""));
        assertThat(((XmlElementEnd) temp).namespaces().size(), is(0));

        temp = channel.readInbound();
        assertThat(temp, nullValue());
    }

    private void write(String content) {
        assertThat(channel.writeInbound(Unpooled.copiedBuffer(content, CharsetUtil.UTF_8)), is(true));
    }

}

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