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Checks WFS 2.0 implementations for conformance to ISO 19142:2010.
package org.opengis.cite.iso19142;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.namespace.QName;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Validator;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import org.apache.xerces.xs.XSComplexTypeDefinition;
import org.apache.xerces.xs.XSElementDeclaration;
import org.apache.xerces.xs.XSSimpleTypeDefinition;
import org.apache.xerces.xs.XSTypeDefinition;
import org.opengis.cite.iso19142.util.TestSuiteLogger;
import org.opengis.cite.iso19142.util.ValidationUtils;
import org.opengis.cite.iso19142.util.WFSClient;
import org.opengis.cite.iso19142.util.XMLUtils;
import org.opengis.cite.validation.SchematronValidator;
import org.opengis.cite.validation.ValidationErrorHandler;
import org.testng.Assert;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.XdmValue;
/**
* Provides a set of custom assertion methods.
*/
public class ETSAssert {
private final static Logger LOGR = Logger.getLogger(ETSAssert.class.getName());
private ETSAssert() {
}
/**
* Asserts that the qualified name of a DOM Node matches the expected value.
*
* @param node
* The Node to check.
* @param qName
* A QName object containing a namespace name (URI) and a local
* part.
*/
public static void assertQualifiedName(Node node, QName qName) {
Assert.assertEquals(node.getLocalName(), qName.getLocalPart(), ErrorMessage.get(ErrorMessageKeys.LOCAL_NAME));
Assert.assertEquals(node.getNamespaceURI(), qName.getNamespaceURI(),
ErrorMessage.get(ErrorMessageKeys.NAMESPACE_NAME));
}
/**
* Asserts that an XPath 1.0 expression holds true for the given evaluation
* context. The following standard namespace bindings do not need to be
* explicitly declared:
*
*
* - wfs: {@value org.opengis.cite.iso19142.Namespaces#WFS}
* - fes: {@value org.opengis.cite.iso19142.Namespaces#FES}
* - ows: {@value org.opengis.cite.iso19142.Namespaces#OWS}
* - xlink: {@value org.opengis.cite.iso19142.Namespaces#XLINK}
* - gml: {@value org.opengis.cite.iso19142.Namespaces#GML}
* - soap: {@value org.opengis.cite.iso19142.Namespaces#SOAP_ENV}
* - xsi:
* {@value javax.xml.XMLConstants#W3C_XML_SCHEMA_INSTANCE_NS_URI}
*
*
* The method arguments will be logged at level FINE or lower.
*
* @param expr
* A valid XPath 1.0 expression.
* @param context
* The context node.
* @param nsBindings
* A collection of namespace bindings for the XPath expression,
* where each entry maps a namespace URI (key) to a prefix
* (value). It may be {@code null}.
*/
public static void assertXPath(String expr, Node context, Map nsBindings) {
boolean result = evaluateXPathToBoolean(expr, context, nsBindings);
Assert.assertTrue(result, ErrorMessage.format(ErrorMessageKeys.XPATH_RESULT, context.getNodeName(), expr));
}
/**
* The XPath is evaluated for given expr and context.
*
* @param expr
* A valid XPath expression.
* @param context
* A context node.
* @param nsBindings
* The list of namespace required for the expr.
* @return True if XPath is evaluated successfully otherwise false.
*/
public static boolean evaluateXPathToBoolean(String expr, Node context, Map nsBindings ) {
if ( null == context ) {
throw new NullPointerException( "Context node is null." );
}
LOGR.log( Level.FINE, "Evaluating \"{0}\" against context node:\n{1}",
new Object[] { expr, XMLUtils.writeNodeToString( context ) } );
try {
boolean result = (boolean) XMLUtils.evaluateXPath( context, expr, nsBindings, XPathConstants.BOOLEAN );
LOGR.log( Level.FINE, "XPath result: " + result );
return result;
} catch ( XPathExpressionException e ) {
String msg = ErrorMessage.format( ErrorMessageKeys.XPATH_ERROR, expr );
LOGR.log( Level.WARNING, msg, e );
throw new AssertionError( msg );
}
}
/**
* Asserts that an XPath 2.0 expression evaluates to {@code true} for the
* given XML source. That is, the result set is not empty.
*
* @param expr
* An XPath 2.0 expression.
* @param source
* A Source object representing an XML resource.
* @param namespaceBindings
* A collection of namespace bindings for the XPath expression,
* where each entry maps a namespace URI (key) to a prefix
* (value). It may be {@code null}.
*/
public static void assertXPath2(String expr, Source source, Map namespaceBindings) {
if (TestSuiteLogger.isLoggable(Level.FINE)) {
TestSuiteLogger.log(Level.FINE, "Asserting XPath expression {0} against {1} ({2})",
new Object[] { expr, source.getClass().getName(), source.getSystemId() });
}
XdmValue result = null;
try {
result = XMLUtils.evaluateXPath2(source, expr, namespaceBindings);
} catch (SaxonApiException e) {
throw new AssertionError(ErrorMessage.format(ErrorMessageKeys.XPATH_ERROR, expr + e.getMessage()));
}
Assert.assertTrue(result.size() > 0,
ErrorMessage.format(ErrorMessageKeys.XPATH_RESULT, source.getSystemId(), expr));
}
/**
* Asserts that an XML resource is schema-valid.
*
* @param validator
* The Validator to use.
* @param source
* The XML Source to be validated.
*/
public static void assertSchemaValid(Validator validator, Source source) {
ValidationErrorHandler errHandler = new ValidationErrorHandler();
validator.setErrorHandler(errHandler);
try {
validator.validate(source);
} catch (Exception e) {
throw new AssertionError(ErrorMessage.format(ErrorMessageKeys.XML_ERROR, e.getMessage()));
}
Assert.assertFalse(errHandler.errorsDetected(), ErrorMessage.format(ErrorMessageKeys.NOT_SCHEMA_VALID,
errHandler.getErrorCount(), errHandler.toString()));
}
/**
* Asserts that an XML resource satisfies all applicable constraints
* specified in a Schematron (ISO 19757-3) schema. The "xslt2" query
* language binding is supported. All patterns are checked.
*
* @param schemaRef
* A URL that denotes the location of a Schematron schema.
* @param xmlSource
* The XML Source to be validated.
*/
public static void assertSchematronValid(URL schemaRef, Source xmlSource) {
SchematronValidator validator;
try {
validator = new SchematronValidator(new StreamSource(schemaRef.toString()), "#ALL");
} catch (Exception e) {
StringBuilder msg = new StringBuilder("Failed to process Schematron schema at ");
msg.append(schemaRef).append('\n');
msg.append(e.getMessage());
throw new AssertionError(msg);
}
Result result = validator.validate(xmlSource);
Assert.assertFalse(validator.ruleViolationsDetected(), ErrorMessage.format(ErrorMessageKeys.NOT_SCHEMA_VALID,
validator.getRuleViolationCount(), XMLUtils.resultToString(result)));
}
/**
* Asserts the availability of a feature having the specified resource
* identifier. The following XPath expression is checked against the
* GetFeature response entity:
*
* {@code //wfs:member/*[@gml:id = '$id']}
*
* @param id
* The feature identifier (assigned by the system).
* @param isAvailable
* A boolean value asserting that the feature either is (
* {@code true}) or is not ({@code false}) available.
* @param wfsClient
* A WFSClient component that interacts with the SUT.
*/
public static void assertFeatureAvailability(String id, boolean isAvailable, WFSClient wfsClient) {
Map params = new HashMap();
params.put("id", id);
Document rsp = wfsClient.invokeStoredQuery(WFS2.QRY_GET_FEATURE_BY_ID, params);
String xpath = String.format("/*[@gml:id = '%s']", id);
NodeList result;
try {
result = XMLUtils.evaluateXPath(rsp, xpath, null);
} catch (XPathExpressionException e) {
throw new RuntimeException(e);
}
if (isAvailable && result.getLength() == 0) {
throw new AssertionError(
ErrorMessage.format(ErrorMessageKeys.FEATURE_AVAILABILITY, result.getLength(), id));
}
if (!isAvailable && result.getLength() > 0) {
throw new AssertionError(
ErrorMessage.format(ErrorMessageKeys.FEATURE_AVAILABILITY, result.getLength(), id));
}
}
/**
* Asserts that one or more simple properties of a feature have the expected
* values. If a property occurs more than once, only the first occurrence is
* checked.
*
* @param feature
* An Element node representing a GML feature.
* @param expectedValues
* A collection of feature properties containing {prop: value}
* entries, where the prop key is an element
* declaration (XSElementDeclaration) denoting a property.
* @param nsBindings
* A collection of namespace bindings for the supplied
* properties, where each entry is a {namespace-name: prefix}
* pair. A binding is not required for standard GML properties.
*/
public static void assertSimpleProperties(Element feature, Map expectedValues,
Map nsBindings) {
for (Map.Entry property : expectedValues.entrySet()) {
XSElementDeclaration propDecl = property.getKey();
XSSimpleTypeDefinition propType;
if (propDecl.getTypeDefinition().getTypeCategory() == XSTypeDefinition.SIMPLE_TYPE) {
propType = (XSSimpleTypeDefinition) propDecl.getTypeDefinition();
} else {
XSComplexTypeDefinition complexType = (XSComplexTypeDefinition) propDecl.getTypeDefinition();
propType = complexType.getSimpleType();
}
String expectedValue = XMLUtils.expandReferencesInText(property.getValue().toString());
String expr = null;
String nsPrefix = (propDecl.getNamespace().equals(Namespaces.GML)) ? "gml"
: nsBindings.get(propDecl.getNamespace());
if (propType.getNumeric()) {
expr = String.format("number(%s:%s[1]) eq %s", nsPrefix, propDecl.getName(), expectedValue);
} else { // string comparison
expr = String.format("%s:%s[1] eq \"%s\"", nsPrefix, propDecl.getName(), expectedValue);
}
assertXPath2(expr, new DOMSource(feature), nsBindings);
}
}
/**
* Asserts that the given XML entity contains the expected number of
* descendant elements having the specified name.
*
* @param xmlEntity
* A Document representing an XML entity.
* @param elementName
* The qualified name of the element.
* @param expectedCount
* The expected number of occurrences.
*/
public static void assertDescendantElementCount(Document xmlEntity, QName elementName, int expectedCount) {
NodeList features = xmlEntity.getElementsByTagNameNS(elementName.getNamespaceURI(), elementName.getLocalPart());
Assert.assertEquals(features.getLength(), expectedCount,
String.format("Unexpected number of %s descendant elements.", elementName));
}
/**
* Asserts that the actual HTTP status code matches one of the expected
* status codes.
*
* @param actualCode
* The actual status code.
* @param expectedCodes
* An int[] array containing the expected status codes.
*/
public static void assertStatusCode(int actualCode, int[] expectedCodes) {
Arrays.sort(expectedCodes); // precondition for binary search
Assert.assertTrue(Arrays.binarySearch(expectedCodes, actualCode) >= 0, String
.format("Expected status code(s) %s but received %d.", Arrays.toString(expectedCodes), actualCode));
}
/**
* Asserts that the given DOM document contains a description of a "Simple
* WFS" implementation.
*
* @param doc
* A Document node representing a WFS capabilities document
* (wfs:WFS_Capabilities}.
*/
public static void assertSimpleWFSCapabilities(Document doc) {
SchematronValidator validator = ValidationUtils.buildSchematronValidator("wfs-capabilities-2.0.sch",
"SimpleWFSPhase");
Result result = validator.validate(new DOMSource(doc, doc.getDocumentURI()), false);
Assert.assertFalse(validator.ruleViolationsDetected(), ErrorMessage.format(ErrorMessageKeys.NOT_SCHEMA_VALID,
validator.getRuleViolationCount(), XMLUtils.resultToString(result)));
}
/**
* Asserts that the given GetFeature response entity contains the expected
* number of feature instances having the specified type name.
*
* @param featureCollection
* A Document representing a GetFeature response
* (wfs:FeatureCollection).
* @param featureType
* The qualified name of a feature type; this may be null, in
* which case the actual type is ignored.
* @param expectedCount
* The expected number of feature instances.
*/
public static void assertFeatureCount(Document featureCollection, QName featureType, int expectedCount) {
NodeList features;
if (null != featureType) {
features = featureCollection.getElementsByTagNameNS(featureType.getNamespaceURI(),
featureType.getLocalPart());
Assert.assertEquals(features.getLength(), expectedCount,
String.format("Unexpected number of %s feature instances in response.", featureType));
} else {
features = featureCollection.getElementsByTagNameNS(WFS2.NS_URI, "member");
Assert.assertEquals(features.getLength(), expectedCount,
"Unexpected number of feature members in response.");
}
}
/**
* Asserts that the given response message contains an OGC exception report.
* The message body must contain an XML document that has a document element
* with the following properties:
*
*
* - [local name] = "ExceptionReport"
* - [namespace name] = "http://www.opengis.net/ows/1.1"
*
*
* @param rspEntity
* A Document node representing an HTTP response entity.
* @param exceptionCode
* The expected OGC exception code.
* @param locator
* A case-insensitive string value expected to occur in the
* locator attribute (e.g. a parameter name); the attribute value
* will be ignored if the argument is null or empty.
*/
public static void assertExceptionReport(Document rspEntity, String exceptionCode, String locator) {
String expr = String.format("//ows11:Exception[@exceptionCode = '%s']", exceptionCode);
NodeList nodeList = null;
try {
nodeList = XMLUtils.evaluateXPath(rspEntity, expr, Collections.singletonMap(Namespaces.OWS, "ows11"));
} catch (XPathExpressionException xpe) {
// won't happen
}
Assert.assertTrue(nodeList.getLength() > 0, "Exception not found in response: " + expr);
if (null != locator && !locator.isEmpty()) {
Element exception = (Element) nodeList.item(0);
String locatorValue = exception.getAttribute("locator").toLowerCase();
Assert.assertTrue(locatorValue.contains(locator.toLowerCase()),
String.format("Expected locator attribute to contain '%s']", locator));
}
}
/**
* Asserts that the specified spatial reference occurs in the given XML
* entity. In general the reference is conveyed by the srsName attribute
* that may appear on any geometry element or gml:Envelope. All occurrences
* must match.
*
* @param entity
* A Document representing an XML entity such as a GML document
* or a WFS GetFeature response.
* @param crsId
* A CRS identifier (an absolute URI value).
*/
public static void assertSpatialReference(Document entity, String crsId) {
NodeList srsNameNodes = null;
try {
srsNameNodes = XMLUtils.evaluateXPath(entity, "//*/@srsName", null);
} catch (XPathExpressionException e) {
throw new AssertionError(e.getMessage());
}
for (int i = 0; i < srsNameNodes.getLength(); i++) {
Attr attr = (Attr) srsNameNodes.item(i);
Assert.assertEquals(attr.getValue(), crsId, String.format("Unexpected @srsName value on element %s",
new QName(attr.getNamespaceURI(), attr.getLocalName())));
}
}
/**
* Asserts that the given response entity contains at least one feature
* instance of the specified type.
*
* @param entity
* A Document representing a GetFeature response entity
* (wfs:FeatureCollection).
* @param featureType
* A QName that identifies the expected feature type; if null,
* any type is acceptable.
*/
public static void assertResultSetNotEmpty(Document entity, QName featureType) {
NodeList features;
if (null != featureType) {
features = entity.getElementsByTagNameNS(featureType.getNamespaceURI(), featureType.getLocalPart());
} else {
features = entity.getElementsByTagNameNS(WFS2.NS_URI, "member");
}
Assert.assertTrue(features.getLength() > 0,
String.format("Expected one or more feature instances in response (type: %s).",
(null != featureType) ? featureType : "any"));
}
}
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