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/*******************************************************************************
* Copyright (c) 2009, 2011 Mountainminds GmbH & Co. KG and Contributors
* 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:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.runtime;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.lang.instrument.ClassDefinition;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.Instrumentation;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.jar.JarFile;
import org.jacoco.core.test.TargetLoader;
import org.junit.Test;
/**
* Unit tests for {@link ModifiedSystemClassRuntime}.
*/
public class ModifiedSystemClassRuntimeTest extends RuntimeTestBase {
@Override
IRuntime createRuntime() {
return new ModifiedSystemClassRuntime(
ModifiedSystemClassRuntimeTest.class, "accessField");
}
@Test(expected = RuntimeException.class)
public void testCreateForNegative() throws Exception {
InstrumentationMock inst = new InstrumentationMock();
ModifiedSystemClassRuntime.createFor(inst, TARGET_CLASS_NAME);
}
/** This static member emulate the instrumented system class. */
public static Object accessField;
private static final String TARGET_CLASS_NAME = "org/jacoco/core/runtime/ModifiedSystemClassRuntimeTest";
private static class InstrumentationMock implements Instrumentation {
boolean added = false;
boolean removed = false;
public void addTransformer(ClassFileTransformer transformer) {
assertFalse(added);
added = true;
try {
// Our class should get instrumented:
final byte[] data = TargetLoader
.getClassDataAsBytes(ModifiedSystemClassRuntimeTest.class);
verifyInstrumentedClass(TARGET_CLASS_NAME,
transformer.transform(null, TARGET_CLASS_NAME, null,
null, data));
// Other classes will not be instrumented:
assertNull(transformer.transform(getClass().getClassLoader(),
"some/other/Class", null, null, new byte[0]));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public boolean removeTransformer(ClassFileTransformer transformer) {
assertTrue(added);
assertFalse(removed);
removed = true;
return true;
}
public Class<?>[] getAllLoadedClasses() {
fail();
return null;
}
public Class<?>[] getInitiatedClasses(ClassLoader loader) {
fail();
return null;
}
public long getObjectSize(Object objectToSize) {
fail();
return 0;
}
public boolean isRedefineClassesSupported() {
fail();
return false;
}
public void redefineClasses(ClassDefinition[] definitions) {
fail();
}
// JDK 1.6 Methods:
@SuppressWarnings("unused")
public void addTransformer(ClassFileTransformer transformer,
boolean canRetransform) {
fail();
}
@SuppressWarnings("unused")
public void appendToBootstrapClassLoaderSearch(JarFile jarfile) {
fail();
}
@SuppressWarnings("unused")
public void appendToSystemClassLoaderSearch(JarFile jarfile) {
fail();
}
@SuppressWarnings("unused")
public boolean isModifiableClass(Class<?> theClass) {
fail();
return false;
}
@SuppressWarnings("unused")
public boolean isNativeMethodPrefixSupported() {
fail();
return false;
}
@SuppressWarnings("unused")
public boolean isRetransformClassesSupported() {
fail();
return false;
}
@SuppressWarnings("unused")
public void retransformClasses(Class<?>... classes) {
fail();
}
@SuppressWarnings("unused")
public void setNativeMethodPrefix(ClassFileTransformer transformer,
String prefix) {
fail();
}
}
private static void verifyInstrumentedClass(String name, byte[] source)
throws Exception {
name = name.replace('/', '.');
final Class<?> targetClass = new TargetLoader(name, source)
.getTargetClass();
// Check added field:
final Field f = targetClass.getField("$jacocoAccess");
assertTrue(Modifier.isPublic(f.getModifiers()));
assertTrue(Modifier.isStatic(f.getModifiers()));
assertTrue(Modifier.isTransient(f.getModifiers()));
assertEquals(Object.class, f.getType());
}
}
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