Examples of nu.xom.Document.query()

nu.xom.Document.query()

        doc.insertChild(p1, 0);
        grandparent.insertChild(p2, 0);
        parent.insertChild(p3, 0);
        child.insertChild(p4, 0);
        
        Nodes result = doc.query("descendant::processing-instruction()[.='3']");
        assertEquals(1, result.size());
        assertEquals(p3, result.get(0));
        
    }

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        ProcessingInstruction pi = new ProcessingInstruction("appendix", "text");
        doc.appendChild(pi);
        ProcessingInstruction pi2 = new ProcessingInstruction("test", "text");
        parent.appendChild(pi2);
        
        Nodes result = doc.query("descendant::processing-instruction('test')");
        assertEquals(1, result.size());
        assertEquals(pi2, result.get(0));
        
    }

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        parent.appendChild(child1);
        parent.appendChild(child2);
        parent.appendChild(child3);
        Document doc = new Document(parent);
        
        Nodes result = doc.query("id('anchor')");
        assertEquals(1, result.size());     
        assertEquals(child2, result.get(0));
        
    }

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    public void testNaNEvaluatesToFalse() {
        
        Element root = new Element("root");
        Document doc = new Document(root);
        
        Nodes result = doc.query("/*[boolean(0 div 0)]");
        assertEquals(0, result.size());
        
    }

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         Element root = new Element("html");
         Document doc = new Document(root);
         root.appendChild("test");
         
         Nodes result = doc.query("/*[string(/) != '']");
         assertEquals(1, result.size());
         assertEquals(root, result.get(0));
         
     }

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             + "</servlet-mapping>\n</root>";
         
         Builder builder = new Builder();
         Document doc = builder.build(data, null);
         
         Nodes result = doc.query("//*[./../servlet-name = 'DeviceInfoServlet']");
         assertEquals(2, result.size());
       
     }

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            + "   </e1>\n"
            + "</doc>";
        
        Document doc = (new Builder()).build(input, null);
        String xpath = "(/*/* | /*/*/namespace::*)\n";
        Nodes result = doc.query(xpath);
        assertEquals(4, result.size());
        Element parent = (Element) result.get(0);
        for (int i = 1; i < 4; i++) {
            Namespace namespace = (Namespace) result.get(i); 
            assertEquals(parent, namespace.getParent());

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            + "   </e1>\n"
            + "</document>";
        
        Document doc = (new Builder()).build(input, null);
        String xpath = "(/*/* | /*/*/attribute::*)\n";
        Nodes result = doc.query(xpath);
        assertEquals(4, result.size());
        Element parent = (Element) result.get(0);
        for (int i = 1; i < 4; i++) {
            Attribute attribute = (Attribute) result.get(i); 
            assertEquals(parent, attribute.getParent());

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        root.appendChild(new Element("child"));
        root.appendChild("test");
        root.addAttribute(new Attribute("test", "test"));
        
        try {
            doc.query("//");
            fail("Queried //");
        }
        catch (XPathException success) {
            assertNotNull(success.getMessage());
        }

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        root.appendChild(new Element("child"));
        root.appendChild("test");
        root.addAttribute(new Attribute("test", "test"));
        
        try {
            doc.query("// ");
            fail("Queried // ");
        }
        catch (XPathException success) {
            assertNotNull(success.getMessage());
        }

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