/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.harmony.tests.java.lang;
import junit.framework.TestCase;
import java.io.IOException;
import java.io.InputStream;
public class ClassLoaderTest extends TestCase {
/** A resource known to be present in the boot classpath. */
private static final String BOOT_RESOURCE_NAME = "java/util/logging/logging.properties";
/** A resource known to be present in the classpath associated with the test class. */
private static final String TEST_RESOURCE_NAME = ClassTest.RESOURCE_ABS_NAME;
private ClassLoader testClassLoader;
@Override
public void setUp() throws Exception {
super.setUp();
testClassLoader = getClass().getClassLoader();
}
/**
* java.lang.ClassLoader#getSystemClassLoader()
*/
public void test_getSystemClassLoader() {
// Test for method java.lang.ClassLoader
// java.lang.ClassLoader.getSystemClassLoader()
ClassLoader cl = ClassLoader.getSystemClassLoader();
assertNotNull(cl);
// The SystemClassLoader's parent should be the Boot classloader, which is used to load
// the various libcore classes.
assertNotNull(cl.getParent());
Class<?> libcoreClass = Integer.class;
assertSame(cl.getParent(), libcoreClass.getClassLoader());
// It is difficult to test further because the CTS tests run as an instrumented TestCase.
// Android apps do not have a system classpath, and rely on an application classloader to
// load app classes and resources, not the System ClassLoader. The System ClassLoader is not
// usually the parent of the application class loader.
}
/**
* java.lang.ClassLoader#getSystemResource(java.lang.String)
*/
public void test_getSystemResourceLjava_lang_String() {
// Test for method java.net.URL
// java.lang.ClassLoader.getSystemResource(java.lang.String)
// It is difficult to test this because the CTS tests run as an instrumented TestCase.
// Android apps do not have a system classpath, and rely on an application classloader to
// load app classes and resources, not the System ClassLoader.
}
/**
* java.lang.ClassLoader#getResource(java.lang.String)
*/
public void test_testClassLoader_getResourceLjava_lang_String() {
// Test for method java.net.URL
// java.lang.ClassLoader.getResource(java.lang.String)
// Test basic class loader behavior for the ClassLoader that was used to load the test
// class while being deliberately vague about which classloader it actually is.
ClassLoader parentClassLoader = testClassLoader.getParent();
assertNull(parentClassLoader.getResource(TEST_RESOURCE_NAME));
assertGetResourceIsValid(parentClassLoader, BOOT_RESOURCE_NAME);
assertGetResourceIsValid(testClassLoader, TEST_RESOURCE_NAME);
assertGetResourceIsValid(testClassLoader, BOOT_RESOURCE_NAME);
}
/**
* java.lang.ClassLoader#getResourceAsStream(java.lang.String)
*/
public void test_testClassLoader_getResourceAsStreamLjava_lang_String() throws Exception {
// Test for method java.io.InputStream
// java.lang.ClassLoader.getResourceAsStream(java.lang.String)
// Test basic class loader behavior for the ClassLoader that was used to load the test
// class while being deliberately vague about which classloader it actually is.
ClassLoader parentClassLoader = testClassLoader.getParent();
assertGetResourceAsStreamNotNull(parentClassLoader, BOOT_RESOURCE_NAME);
assertNull(parentClassLoader.getResourceAsStream(TEST_RESOURCE_NAME));
assertGetResourceAsStreamNotNull(testClassLoader, BOOT_RESOURCE_NAME);
assertGetResourceAsStreamNotNull(testClassLoader, TEST_RESOURCE_NAME);
}
public void test_testClassLoader_loadClass() throws Exception {
// Test basic class loader behavior for the ClassLoader that was used to load the test
// class while being deliberately vague about which classloader it actually is.
String integerClassName = Integer.class.getName();
String testClassName = ClassLoaderTest.class.getName();
ClassLoader parentClassLoader = testClassLoader.getParent();
assertSame(Integer.class, parentClassLoader.loadClass(integerClassName));
try {
parentClassLoader.loadClass(testClassName);
fail();
} catch (ClassNotFoundException expected) {
}
assertSame(Integer.class, testClassLoader.loadClass(integerClassName));
assertSame(this.getClass(), testClassLoader.loadClass(testClassName));
}
//Regression Test for JIRA-2047
public void test_testClassLoader_getResourceAsStream_withSharpChar() throws Exception {
assertGetResourceAsStreamNotNull(testClassLoader, ClassTest.SHARP_RESOURCE_ABS_NAME);
}
private static void assertGetResourceAsStreamNotNull(ClassLoader classLoader,
String resourceName) throws IOException {
InputStream is = null;
try {
is = classLoader.getResourceAsStream(resourceName);
assertNotNull(is);
} finally {
if (is != null) {
is.close();
}
}
}
private static void assertGetResourceIsValid(ClassLoader classLoader, String resourceName) {
java.net.URL u = classLoader.getResource(resourceName);
assertNotNull(u);
InputStream is = null;
try {
is = u.openStream();
assertNotNull(is);
is.close();
} catch (IOException e) {
fail("IOException getting stream for resource : " + e.getMessage());
}
}
}