Created
April 10, 2013 11:58
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Demonstrates a Bug (?) with javas DocumentBuilder for String nodes with very long text. The only difference between the two test cases is that the first "testShortText" uses a text with 100 lines (see line 21) and the second "testLongText" uses 1000 lines (see line 39). While "testShortText" is running without problems, "testLongText" is red. Th…
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| import static org.junit.Assert.assertEquals; | |
| import static org.junit.Assert.assertNotNull; | |
| import java.io.ByteArrayInputStream; | |
| import java.io.InputStream; | |
| import javax.xml.parsers.DocumentBuilder; | |
| import javax.xml.parsers.DocumentBuilderFactory; | |
| import org.junit.Test; | |
| import org.w3c.dom.Document; | |
| import org.w3c.dom.Node; | |
| public class DocumentBuilderTest { | |
| @Test | |
| public void testShortText() { | |
| final String content = createText(100); | |
| final String html = createHtmlWithContent(content); | |
| final Document doc = createDocumentFromString(html); | |
| assertNotNull(doc); | |
| final Node body = doc.getElementsByTagName("body").item(0); | |
| assertEquals(content.trim(), body.getTextContent().trim()); | |
| } | |
| @Test | |
| public void testLongText() { | |
| final String content = createText(1000); | |
| final String html = createHtmlWithContent(content); | |
| final Document doc = createDocumentFromString(html); | |
| assertNotNull(doc); | |
| final Node body = doc.getElementsByTagName("body").item(0); | |
| assertEquals(content, body.getTextContent().trim()); | |
| } | |
| private Document createDocumentFromString(final String html) { | |
| final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); | |
| try { | |
| final DocumentBuilder documentBuilder = factory.newDocumentBuilder(); | |
| final InputStream is = new ByteArrayInputStream(html.getBytes("UTF-8")); | |
| return documentBuilder.parse(is); | |
| } catch (final Exception e) { | |
| e.printStackTrace(); | |
| return null; | |
| } | |
| } | |
| private String createHtmlWithContent(final String content) { | |
| final StringBuilder builder = new StringBuilder(); | |
| builder.append("<?xml version=\"1.1\" encoding=\"UTF-8\" ?>"); | |
| builder.append("<!DOCTYPE html>\n"); | |
| builder.append("<html lang=\"en\">\n"); | |
| builder.append(" <head>\n"); | |
| builder.append(" <meta charset=\"utf-8\" />\n"); | |
| builder.append(" <title>test document</title>\n"); | |
| builder.append(" </head>\n"); | |
| builder.append(" <body>\n"); | |
| builder.append(content); | |
| builder.append(" </body>\n"); | |
| builder.append("</html>\n"); | |
| return builder.toString(); | |
| } | |
| private String createText(final int lines) { | |
| final StringBuilder builder = new StringBuilder(); | |
| for (int i = 0; i < lines; i++) { | |
| builder.append("A new Line with the linenumber " + i + "\n"); | |
| } | |
| return builder.toString(); | |
| } | |
| } |
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