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/*******************************************************************************
* Copyright (c) 2005, 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.tests.internal;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import junit.framework.TestCase;
import junit.framework.TestFailure;
import junit.framework.TestResult;
/**
* various tools that can be used by test cases
*/
public final class TestTools {
/**
* test an object's implementation of Serializable by serializing the
* specified object to a byte array; then de-serializing the byte array and
* returning the resultant object
*/
@SuppressWarnings("unchecked")
public static <T> T serialize(T o) throws IOException, ClassNotFoundException {
ByteArrayOutputStream baOutStream = new ByteArrayOutputStream(2000);
ObjectOutputStream outStream = new ObjectOutputStream(baOutStream);
outStream.writeObject(o);
outStream.close();
ByteArrayInputStream baInStream = new ByteArrayInputStream(baOutStream.toByteArray());
ObjectInputStream inStream = new ObjectInputStream(baInStream);
T o2 = (T) inStream.readObject();
inStream.close();
return o2;
}
/**
* some tests require access to the Web (e.g. any tests that parse an XML
* document that specifies a DTD or Schema that is loaded from the Web); use
* this method to configure the JDK proxy settings
*/
public static void setUpOracleProxy() {
System.setProperty("http.proxyHost", "www-proxy.us.oracle.com");
System.setProperty("http.proxyPort", "80");
}
/**
* some tests require access to the Web (e.g. any tests that parse an XML
* document that specifies a DTD or Schema that is loaded from the Web); use
* this method to configure the JDK proxy settings via the command-line
*/
public static String[] buildOracleProxyCommandLineOptions() {
return new String[] { "-Dhttp.proxyHost=www-proxy.us.oracle.com", "-Dhttp.proxyPort=80" };
}
/**
* redirect std out and std err to the specified stream
*/
public static void redirectSystemStreamsTo(OutputStream outputStream) {
redirectSystemStreamsTo(new PrintStream(outputStream));
}
/**
* redirect std out and std err to the specified stream
*/
public static void redirectSystemStreamsTo(PrintStream printStream) {
System.setOut(printStream);
System.setErr(printStream);
}
/**
* execute the specified test and dump the results to the console
*/
public static String execute(TestCase testCase) {
long start = System.currentTimeMillis();
TestResult result = testCase.run();
long end = System.currentTimeMillis();
StringWriter stringWriter = new StringWriter();
PrintWriter writer = new PrintWriter(stringWriter);
writer.print(testCase.getName());
writer.print(": ");
if (result.wasSuccessful()) {
writer.println("OK");
} else {
TestFailure failure = null;
if (result.failures().hasMoreElements()) {
failure = (TestFailure) result.failures().nextElement();
} else {
failure = (TestFailure) result.errors().nextElement();
}
failure.thrownException().printStackTrace(writer);
}
writer.print("elapsed time: ");
long elapsed = end - start;
writer.print(elapsed / 1000L);
writer.println(" sec.");
return stringWriter.toString();
}
private static final Class<TestCase> TestCase_class = TestCase.class;
/**
* Clear out all the instance variable of the specified test case, allowing
* the various test fixtures to be garbage-collected. Typically this is
* called in the #tearDown() method.
*/
public static void clear(TestCase testCase) throws IllegalAccessException {
for (Class<?> tempClass = testCase.getClass(); tempClass != TestCase_class; tempClass = tempClass.getSuperclass()) {
Field[] fields = tempClass.getDeclaredFields();
for (int i = fields.length; i-- > 0;) {
Field field = fields[i];
// leave primitives alone - they don't get garbage-collected, and we can't set them to null...
if (field.getType().isPrimitive()) {
continue;
}
// leave static fields alone (?)
if (Modifier.isStatic(field.getModifiers())) {
continue;
}
field.setAccessible(true);
field.set(testCase, null);
}
}
}
/**
* Workaround for a JUnit bug: JUnit does not configure the testing Thread
* with a context class loader. This should probably happen in
* TestRunner.doRunTest(Test), just before starting the thread.
*/
public static void setUpJUnitThreadContextClassLoader() {
Thread.currentThread().setContextClassLoader(TestTools.class.getClassLoader());
}
private TestTools() {
super();
throw new UnsupportedOperationException();
}
}
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