### Question:
XMLScriptService implements ScriptService { public String serialize(Node node) { return XMLUtils.serialize(node); } XMLScriptService(); static String escape(Object content); static String escapeForAttributeValue(Object content); static String escapeForElementContent(Object content); static String unescape(Object content); Document createDOMDocument(); Document parse(LSInput source); Document parse(byte[] content); Document parse(String content); Document parse(InputStream stream); String serialize(Node node); String serialize(Node node, boolean withXmlDeclaration); String transform(Source xml, Source xslt); String transform(Document xml, Document xslt); String transform(byte[] xml, byte[] xslt); String transform(String xml, String xslt);  }### Answer:
@Test void testSerialize() { Document d = createSimpleDocument(); String result = this.xml.serialize(d); assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<a>\u00E9</a>", result, "Wrong serialization"); }
@Test void testSerializeDocumentElement() { Document d = createSimpleDocument(); String result = this.xml.serialize(d.getDocumentElement()); assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<a>\u00E9</a>", result, "Wrong serialization"); }
@Test void testSerializeNode() { Document d = createSimpleDocument(); Element b = d.createElement("b"); b.setTextContent("c"); d.getDocumentElement().appendChild(b); String result = this.xml.serialize(d.getDocumentElement().getElementsByTagName("b").item(0)); assertEquals("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<b>c</b>", result, "Wrong serialization"); }
@Test void testSerializeNull() { assertEquals("", this.xml.serialize(null), "Wrong serialization for null document"); }
@Test void testSerializeWithoutXmlDeclaration() { Document d = createSimpleDocument(); String result = this.xml.serialize(d.getDocumentElement(), false); assertEquals("<a>\u00E9</a>", result, "Wrong serialization"); }