在我的JUnit测试中,我将预期的XML文件与解析器创建的虚拟文档进行比较:
public void test() throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
DocumentBuilder builder = factory.newDocumentBuilder();
try (InputStream input = getClass().getResourceAsStream("expected.xml");) {
Document expectedDocument = builder.parse(input);
Document actualDocument = createVirtualDocument();
XMLTestCase.assertXMLEqual(expectedDocument, actualDocument);
}
}
问题是:即使XML文件相同(或者最后类似),断言也会失败。 XML文件如下所示:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="text/ecmascript" contentStyleType="text/css" preserveAspectRatio="xMidYMid meet" version="1.0" zoomAndPan="magnify">
<g class="group">
<rect class="shape" height="40.0" width="30.0" x="10.0" y="20.0"/>
</g>
</svg>
另一个:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" contentScriptType="text/ecmascript" zoomAndPan="magnify" contentStyleType="text/css" preserveAspectRatio="xMidYMid meet" version="1.0">
<g class="group">
<rect x="10.0" width="30.0" height="40.0" y="20.0" class="shape"/>
</g>
</svg>
简而言之:属性顺序不同。我已经尝试了XMLUnit.setIgnoreAttributeOrder(true)
和XMLUnit.setNormalize(true)
,但无济于事。
测试失败时收到的消息是:
[not identical] Expected attribute value explicitly specified 'true' but was 'false' - comparing <svg contentScriptType="text/ecmascript"...> at /svg[1]/@contentScriptType to <svg contentScriptType="text/ecmascript"...> at /svg[1]/@contentScriptType
[not identical] Expected attribute value explicitly specified 'true' but was 'false' - comparing <svg contentStyleType="text/css"...> at /svg[1]/@contentStyleType to <svg contentStyleType="text/css"...> at /svg[1]/@contentStyleType
[not identical] Expected attribute value explicitly specified 'true' but was 'false' - comparing <svg preserveAspectRatio="xMidYMid meet"...> at /svg[1]/@preserveAspectRatio to <svg preserveAspectRatio="xMidYMid meet"...> at /svg[1]/@preserveAspectRatio
[not identical] Expected attribute value explicitly specified 'true' but was 'false' - comparing <svg version="1.0"...> at /svg[1]/@version to <svg version="1.0"...> at /svg[1]/@version
[not identical] Expected attribute value explicitly specified 'true' but was 'false' - comparing <svg zoomAndPan="magnify"...> at /svg[1]/@zoomAndPan to <svg zoomAndPan="magnify"...> at /svg[1]/@zoomAndPan
[different] Expected presence of child node 'g' but was 'null' - comparing <g...> at /svg[1]/g[1] to at null
我也尝试过:
Diff difference = new Diff(expectedDocument, actualDocument);
difference.overrideElementQualifier(new ElementNameAndAttributeQualifier());
但差异声称不相似。那么如何正确比较这两个XML文档呢?
答案 0 :(得分:0)
那只是愚蠢的。如果我不比较Document
但将它们转换为字符串并比较它们,则代码有效:
ByteArrayOutputStream expected = new ByteArrayOutputStream();
storeXml(expectedDocument, expected);
ByteArrayOutputStream actual = new ByteArrayOutputStream();
storeXml(actualDocument, actual);
assertXMLEqual(expected.toString(), actual.toString());
使用:
protected static void storeXml(Document document, OutputStream out) throws Exception {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
transformer.transform(new DOMSource(document), new StreamResult(out));
}