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A complete, Java-based solution for accessing, manipulating,
and outputting XML data
package org.jdom2.test.util;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.TreeMap;
import java.util.concurrent.atomic.AtomicBoolean;
import org.jdom2.Attribute;
import org.jdom2.Comment;
import org.jdom2.Content;
import org.jdom2.DocType;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.EntityRef;
import org.jdom2.Namespace;
import org.jdom2.NamespaceAware;
import org.jdom2.ProcessingInstruction;
@SuppressWarnings("javadoc")
public class UnitTestUtil {
private static final AtomicBoolean isandroid = new AtomicBoolean(false);
public static final void setAndroid() {
isandroid.set(true);
}
public static final void testNamespaceIntro(NamespaceAware content, Namespace...expect) {
List intro = content.getNamespacesIntroduced();
List exp = Arrays.asList(expect);
if (!exp.equals(intro)) {
fail("We expect Introduced equal the Expected Namespaces." +
"\n Introduced: " + intro.toString() +
"\n Expected: " + exp.toString());
}
}
public static final void testNamespaceScope(NamespaceAware content, Namespace...expect) {
List introduced = content.getNamespacesIntroduced();
List inscope = new ArrayList(content.getNamespacesInScope());
List inherited = content.getNamespacesInherited();
if (introduced.size() + inherited.size() != inscope.size()) {
fail(String.format("InScope Namespaces do not add up: InScope=%d Inherited=%d, Introduced=%d",
inscope.size(), inherited.size(), introduced.size()));
}
int inher = 0;
int intro = 0;
for (Namespace ns : inscope) {
if (inher < inherited.size() && inherited.get(inher) == ns) {
inher++;
}
if (intro < introduced.size() && introduced.get(intro) == ns) {
intro++;
}
}
if (intro < introduced.size()) {
// we are missing content(or it is out of order) in the lists.
fail("Introduced list contains out-of-order, or non-intersecting Namespaces." +
"\n InScope: " + inscope.toString() +
"\n Introduced: " + introduced.toString());
}
if (inher < inherited.size()) {
// we are missing content(or it is out of order) in the lists.
fail("Inherited list contains out-of-order, or non-intersecting Namespaces." +
"\n InScope: " + inscope.toString() +
"\n Inherited: " + inherited.toString());
}
int i = 0;
for (Namespace ns : inscope) {
if (i >= expect.length) {
fail("We have additional Namespaces " + inscope.subList(i, inscope.size()));
}
if (expect[i] != ns) {
assertEquals("InScope differs from Expected at index " + i, expect[i], ns);
}
i++;
}
if (i < expect.length) {
ArrayList missing = new ArrayList(expect.length - i);
while (i < expect.length) {
missing.add(expect[i++]);
}
fail("InScope is missing Namespaces " + missing);
}
inscope.removeAll(introduced);
if (!inscope.equals(inherited)) {
fail("We expect InScope - Introduced to equal Inherited." +
"\n InScope: " + inscope.toString() +
"\n Inherited: " + inherited.toString());
}
}
/**
* Serialize, then deserialize an instance object.
* @param tclass
* @param input
* @return
*/
public static final T deSerialize(T input) {
if (input == null) {
return null;
}
Class tclass = input.getClass();
final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try {
final ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
try {
objectOutputStream.writeObject(input);
}
catch(final IOException ioException) {
failException("Unable to serialize object" + ioException, ioException);
}
finally {
try {
objectOutputStream.close();
}
catch(final IOException ioException) {
fail("failed to close object stream while serializing object" + ioException);
}
}
}
catch(final IOException ioException) {
fail("unable to serialize object" + ioException);
}
finally {
try {
outputStream.close();
}
catch(final IOException ioException) {
fail("failed to close output stream while serializing object" + ioException);
}
}
final byte[] bytes = outputStream.toByteArray();
Object o = null;
final InputStream inputStream = new ByteArrayInputStream(bytes);
try {
final ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
try {
o = objectInputStream.readObject();
}
finally {
try {
objectInputStream.close();
}
catch(final IOException ioException) {
fail("failed to close object stream while deserializing object" + ioException);
}
}
}
catch(final IOException ioException) {
fail("unable to deserialize object" + ioException);
}
catch(final ClassNotFoundException classNotFoundException) {
fail("unable to deserialize object" + classNotFoundException);
}
finally {
try{
inputStream.close();
}
catch(final IOException ioException) {
fail("failed to close output stream while serializing object" + ioException);
}
}
@SuppressWarnings("unchecked")
T t = (T)tclass.cast(o);
return t;
}
/**
* Attribute order is not significant in XML documents.
* This method re-arranges the order of the Attributes (in somewhat
* alphabetical order, but that's not important) so that you can easily
* compare the attribute content of two different elements.
* @param emt The element who's Attributes we should rearrange.
*/
public static final void normalizeAttributes(Element emt) {
if (!emt.hasAttributes()) {
return;
}
TreeMap sorted = new TreeMap();
List atts = emt.getAttributes();
for (Object o : atts.toArray()) {
Attribute a = (Attribute)o;
sorted.put(a.getQualifiedName(), a);
a.detach();
}
for (Attribute a : sorted.values()) {
emt.setAttribute(a);
}
for (Object o : emt.getChildren()) {
normalizeAttributes((Element)o);
}
}
/**
* Test whether two values are equals, in addition, check the hashCode() values
* This method will pass if both values are null.
* @param a The first value to check
* @param b The other value
*/
public static final void checkEquals(Object a, Object b) {
if (a == null) {
if (b != null) {
fail("Second value is not null like the first: " + b.toString());
}
return;
}
if (b == null) {
fail ("First value is not null like the second: " + a.toString());
}
assertTrue(a.equals(a));
assertTrue(b.equals(b));
if (!a.equals(b)) {
fail("First value '" + a + "' does not equals() second value '" + b + "'.");
}
if (!b.equals(a)) {
fail("Second value '" + b + "' does not equals() first value '" + a + "'.");
}
if (a.hashCode() != b.hashCode()) {
fail("Hashcodes of equals() values are different. " +
"First value '" + a + "' (hashcode=" + a.hashCode() + ") " +
"not same as " +
"second value '" + b + "' (hashcode=" + b.hashCode() + ").");
}
}
public static final void testReadIterator(Iterator it, Object ... values) {
assertTrue(it != null);
assertTrue(values != null);
for (int i = 0; i < values.length; i++) {
assertTrue(it.hasNext());
assertTrue(values[i] == it.next());
}
assertFalse("Not enough values in the test set.", it.hasNext());
try {
it.next();
fail("Should not be able to have next after values have run out.");
} catch (NoSuchElementException nsee) {
// the way it should be
} catch (Exception e) {
fail("next() should fail with NoSuchElementException, not " + e.getClass().getName());
}
}
/**
* Create a new String instance based on an input String.
* The String class tends to have these fancy ways of re-using internal
* data structures when creating one string from another. This method
* circumvents those optimisations.
* @param value The value to clone
* @return The cloned version of the input value.
*/
public static final String cloneString(String value) {
char[] chars = value.toCharArray();
char[] ret = new char[chars.length];
System.arraycopy(chars, 0, ret, 0, chars.length);
return new String(ret);
}
/**
* Provide a standard way to fail when we expect an exception but did not
* get one...
*/
public static final void failNoException(Class expect) {
fail("This code was expected to produce the exception " +
expect.getName() + " but it was not thrown.");
}
/**
* Provide a standard test for checking for an exception.
* @param expect
* @param got
*/
public static final void checkException(Class expect,
Throwable got) {
if (expect == null) {
fail("We can't expect a null exception (cryptic enough?)");
}
if (got == null) {
fail("We expected an exception of type " + expect.getName() +
" but got a null value instead");
}
if (!expect.isInstance(got)) {
AssertionError ae = new AssertionError(
"We expected an exception of type " + expect.getName() +
" but got a " + got.getClass().getName() +
" instead with message " + got.getMessage());
if (isandroid.get()) {
System.out.println("ANDROID: About to throw AssertionError " +
"but we cannot initialize the cause... " +
"Here follows both the AssertionError and its cause");
ae.printStackTrace();
System.out.println("And the cause...");
got.printStackTrace();
} else {
ae.initCause(got);
}
throw ae;
}
}
/**
* Call this if you have an exception you want to fail for!
* @param message
* @param got this exception
*/
public static void failException(String message, Throwable got) {
AssertionError ae = new AssertionError(message);
if (isandroid.get()) {
System.out.println("ANDROID: About to throw AssertionError " +
"but we cannot initialize the cause... " +
"Here follows both the AssertionError and its cause");
ae.printStackTrace();
System.out.println("And the cause...");
got.printStackTrace();
} else {
ae.initCause(got);
}
throw ae;
}
public static final void compare(final NamespaceAware ap, final NamespaceAware bp) {
assertNotNull(ap);
assertNotNull(bp);
assertEquals(ap.getClass(), bp.getClass());
assertTrue(ap != bp);
if (ap instanceof Content) {
final Content a = (Content)ap;
final Content b = (Content)bp;
if (a.getParent() != null) {
assertTrue(a.getParent() != b.getParent());
}
switch (a.getCType()) {
case Text:
assertEquals(a.getValue(), b.getValue());
break;
case CDATA:
assertEquals(a.getValue(), b.getValue());
break;
case Comment:
assertEquals(((Comment)a).getText(), ((Comment)b).getText());
break;
case DocType:
DocType da = (DocType)a;
DocType db = (DocType)b;
assertEquals(da.getElementName(), db.getElementName());
assertEquals(da.getPublicID(), db.getPublicID());
assertEquals(da.getSystemID(), db.getSystemID());
assertEquals(da.getInternalSubset(), db.getInternalSubset());
break;
case Element:
Element ea = (Element)a;
Element eb = (Element)b;
assertEquals(ea.getName(), eb.getName());
compare(ea.getAttributes(), eb.getAttributes());
assertEquals(ea.getNamespacesInScope(), eb.getNamespacesInScope());
final int sz = ea.getContentSize();
assertTrue(sz == eb.getContentSize());
for (int i = 0; i < sz; i++) {
compare(ea.getContent(i), eb.getContent(i));
}
break;
case EntityRef:
assertEquals(((EntityRef)a).getName(), ((EntityRef)b).getName());
break;
case ProcessingInstruction:
ProcessingInstruction pa = (ProcessingInstruction)a;
ProcessingInstruction pb = (ProcessingInstruction)b;
assertEquals(pa.getTarget(), pb.getTarget());
assertEquals(pa.getData(), pb.getData());
break;
}
} else if (ap instanceof Attribute) {
compare ((Attribute)ap, (Attribute)bp);
} else if (ap instanceof Document) {
Document a = (Document)ap;
Document b = (Document)bp;
assertEquals(a.getBaseURI(), b.getBaseURI());
final int sz = a.getContentSize();
assertTrue(sz == b.getContentSize());
for (int i = 0; i < sz; i++) {
compare(a.getContent(i), b.getContent(i));
}
}
}
public static final void compare(List a, List b) {
assertTrue(a != b);
assertTrue(a.size() == b.size());
Iterator ait = a.iterator();
Iterator bit = b.iterator();
while (ait.hasNext() && bit.hasNext()) {
Attribute aa = ait.next();
Attribute bb = bit.next();
compare(aa, bb);
}
assertFalse(ait.hasNext());
assertFalse(bit.hasNext());
}
public static final void compare(Attribute aa, Attribute bb) {
assertEquals(aa.getName(), bb.getName());
assertTrue(aa.getNamespace() == bb.getNamespace());
assertEquals(aa.getValue(), bb.getValue());
}
}
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