Reproducer for #179 WstxValidationException: Unknown reason (at end element </nl:nillableIntElement>) when validating a document with nillable elements

src/test/java/wstxtest/msv/TestW3CSchemaNillable.java

@@ -0,0 +1,156 @@
+package wstxtest.msv;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.StringWriter;
+
+import javax.xml.XMLConstants;
+import javax.xml.stream.*;
+import javax.xml.transform.Source;
+import javax.xml.transform.stream.StreamSource;
+import javax.xml.validation.Schema;
+import javax.xml.validation.SchemaFactory;
+import javax.xml.validation.Validator;
+
+import org.codehaus.stax2.*;
+import org.codehaus.stax2.validation.*;
+import org.xml.sax.SAXException;
+
+import wstxtest.vstream.BaseValidationTest;
+
+/**
+ * Test whether MSV validator behaves the same w.r.t. nillable elements as javax.xml.validation validator.
+ * A reproducer for <a href="https://github.com/FasterXML/woodstox/issues/179">https://github.com/FasterXML/woodstox/issues/179</a>.
+ */
+public class TestW3CSchemaNillable
+    extends BaseValidationTest
+{
+
+    public void testNillableDateTime() throws XMLStreamException, IOException, SAXException
+    {
+        testNillable("wstxtest/msv/nillableDateTime.xml");
+    }
+    public void testNillableInt() throws XMLStreamException, IOException, SAXException
+    {
+        testNillable("wstxtest/msv/nillableInt.xml");
+    }
+    public void testNillableString() throws XMLStreamException, IOException, SAXException
+    {
+        testNillable("wstxtest/msv/nillableString.xml");
+    }
+
+    void testNillable(String xmlResource) throws XMLStreamException, IOException, SAXException
+    {
+        boolean woodstoxPassed = true;
+        // Woodstox
+        final String xsdResource = "wstxtest/msv/nillable.xsd";
+        {
+            XMLValidationSchemaFactory schF = XMLValidationSchemaFactory.newInstance(XMLValidationSchema.SCHEMA_ID_W3C_SCHEMA);
+            InputStream schemaInput = getClass().getClassLoader().getResourceAsStream(xsdResource);
+            InputStream xmlInput = getClass().getClassLoader().getResourceAsStream(xmlResource);
+            try {
+                XMLValidationSchema schema = schF.createSchema(schemaInput);
+                XMLInputFactory2 f = getInputFactory();
+                setValidating(f, false);
+
+                XMLStreamReader2 xmlReader = (XMLStreamReader2) f.createXMLStreamReader(xmlInput);
+
+                /* the validation exception is only thrown from the writer
+                xmlReader.setValidationProblemHandler(new ValidationProblemHandler() {
+                    @Override
+                    public void reportProblem(XMLValidationProblem problem)
+                            throws XMLValidationException {
+                        throw new LocalValidationError(problem);
+                    }
+                });
+                xmlReader.validateAgainst(schema);
+                */
+
+                StringWriter writer = new StringWriter();
+                XMLStreamWriter2 xmlWriter = (XMLStreamWriter2) getOutputFactory().createXMLStreamWriter(writer);
+                xmlWriter.setValidationProblemHandler(new ValidationProblemHandler() {
+                    @Override
+                    public void reportProblem(XMLValidationProblem problem)
+                            throws XMLValidationException {
+                        throw new LocalValidationError(problem);
+                    }
+                });
+                xmlWriter.validateAgainst(schema);
+
+                try {
+                    xmlWriter.copyEventFromReader(xmlReader, false);
+                    while (xmlReader.hasNext()) {
+                        xmlReader.next();
+                        xmlWriter.copyEventFromReader(xmlReader, false);
+                    }
+                } catch (LocalValidationError e) {
+                    e.printStackTrace();
+                    woodstoxPassed = false;
+                }
+            } finally {
+                if (xmlInput != null) {
+                    xmlInput.close();
+                }
+                if (schemaInput != null) {
+                    schemaInput.close();
+                }
+            }
+        }
+
+        // javax.xml.validation
+        boolean javaxXmlValidationPassed = true;
+        {
+            InputStream schemaInput = getClass().getClassLoader().getResourceAsStream(xsdResource);
+            InputStream xmlInput = getClass().getClassLoader().getResourceAsStream(xmlResource);
+            SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+            try {
+                Source schemaFile = new StreamSource(schemaInput);
+                Schema schema = factory.newSchema(schemaFile);
+                Validator validator = schema.newValidator();
+                try {
+                    validator.validate(new StreamSource(xmlInput));
+                } catch (SAXException e) {
+                    javaxXmlValidationPassed = false;
+                    e.printStackTrace();
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            } finally {
+                if (xmlInput != null) {
+                    xmlInput.close();
+                }
+                if (schemaInput != null) {
+                    schemaInput.close();
+                }
+            }
+        }
+
+        if (woodstoxPassed != javaxXmlValidationPassed) {
+            fail("Woodstox MSV validator " + (woodstoxPassed ? "passed" : "did not pass")
+                    + " but javax.xml.validation validator "+ (javaxXmlValidationPassed ? "passed" : "did not pass")
+                    + " for " + xsdResource + " and "+ xmlResource);
+        }
+
+    }
+
+    /*
+    ///////////////////////////////////////////////////////////////////////
+    // Helper classes
+    ///////////////////////////////////////////////////////////////////////
+    */
+
+    public static class LocalValidationError extends RuntimeException
+    {
+        private static final long serialVersionUID = 1L;
+
+        protected XMLValidationProblem problem;
+
+        LocalValidationError(XMLValidationProblem problem) {
+            this.problem = problem;
+        }
+
+        public XMLValidationProblem getProblem() {
+            return problem;
+        }
+    }
+}

src/test/resources/wstxtest/msv/nillable.xsd

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+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
+           xmlns="http://server.hw.demo/nillable"
+           targetNamespace="http://server.hw.demo/nillable"
+           elementFormDefault="qualified" attributeFormDefault="qualified">
+  <xs:element name="nillableParent">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element name="nillableDateTime" type="xs:dateTime" nillable="true" minOccurs="0"/>
+        <xs:element name="nillableInt" type="xs:int" nillable="true" minOccurs="0"/>
+        <xs:element name="nillableString" type="xs:string" nillable="true"  minOccurs="0"/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+</xs:schema>

src/test/resources/wstxtest/msv/nillableDateTime.xml

@@ -0,0 +1,3 @@
+<nl:nillableParent xmlns:nl="http://server.hw.demo/nillable">
+    <nl:nillableDateTime xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
+</nl:nillableParent>

src/test/resources/wstxtest/msv/nillableInt.xml

@@ -0,0 +1,3 @@
+<nl:nillableParent xmlns:nl="http://server.hw.demo/nillable">
+    <nl:nillableInt xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
+</nl:nillableParent>

src/test/resources/wstxtest/msv/nillableString.xml

@@ -0,0 +1,3 @@
+<nl:nillableParent xmlns:nl="http://server.hw.demo/nillable">
+    <nl:nillableString xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:nil="true"/>
+</nl:nillableParent>