Jsoup produces invalid XML

Jsoup doesn't handle correctly ampersand in scripts when converting to XML. Jsoup doesn't handle correctly   entity when converting to XML. In these cases XML generated is invalid. Find below a junit test which reproduces the bugs. Test is standalone and only requires java. Java 17. Jsoup 1.15.4 Test 1 and 3 fail. The test 2 is OK.

package jsoup.test;

import java.io.ByteArrayInputStream;
import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.jsoup.Jsoup;
import org.junit.Test;
import org.xml.sax.SAXException;

public class JsoupTest {
    @Test
    public void testHtml2XmlWithJsoupWithAmpersand() {
        String htmlDoc = "<!DOCTYPE html><html><head><script>&</script></head><body></body></html>";
        html2xml(htmlDoc);
    }

    @Test
    public void testHtml2XmlWithJsoupWithAmpersandEntity() {
        String htmlDoc = "<!DOCTYPE html><html><head><script>anything &amp;</script></head><body></body></html>";
        html2xml(htmlDoc);
    }

    @Test
    public void testHtml2XmlWithJsoupWithNbspEntity() {
        String htmlDoc = "<!DOCTYPE html><html><head></head><body>&nbsp;</body></html>";
        html2xml(htmlDoc);
    }

    private void html2xml(String htmlDoc) {
        try {
            // generate xml with jsoup
            org.jsoup.nodes.Document document = Jsoup.parse(htmlDoc);
            document.outputSettings().syntax(org.jsoup.nodes.Document.OutputSettings.Syntax.xml);
            document.outputSettings().charset("UTF-8");
            String xml = document.html();

            // parse xml with standard Java libraries
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            ByteArrayInputStream input = new ByteArrayInputStream(xml.getBytes("UTF-8"));
            builder.parse(input);
        } catch (IOException | ParserConfigurationException | SAXException e) {
            throw new RuntimeException(e);
        }
    }

}

jhy / jsoup

Jsoup produces invalid XML #1937