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/*******************************************************************************
* Copyright (c) 2009, 2015 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.agent.rt.internal;
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.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.instrument.IllegalClassFormatException;
import org.jacoco.core.JaCoCo;
import org.jacoco.core.runtime.AbstractRuntime;
import org.jacoco.core.runtime.AgentOptions;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.objectweb.asm.MethodVisitor;
/**
* Unit tests for {@link CoverageTransformer}.
*/
public class CoverageTransformerTest {
private ExceptionRecorder recorder;
private AgentOptions options;
private ClassLoader classLoader;
private StubRuntime runtime;
@Before
public void setup() {
recorder = new ExceptionRecorder();
options = new AgentOptions();
classLoader = getClass().getClassLoader();
runtime = new StubRuntime();
}
@After
public void teardown() {
recorder.assertNoException();
}
@Test
public void testFilterAgentClass() {
CoverageTransformer t = createTransformer();
assertFalse(t.filter(classLoader,
"org/jacoco/agent/rt/internal/somepkg/SomeClass"));
}
@Test
public void testFilterIncludesBootstrapClassesPositive() {
options.setInclBootstrapClasses(true);
CoverageTransformer t = createTransformer();
assertTrue(t.filter(null, "java/util/TreeSet"));
}
@Test
public void testFilterIncludesBootstrapClassesNegative() {
options.setInclBootstrapClasses(false);
CoverageTransformer t = createTransformer();
assertFalse(t.filter(null, "java/util/TreeSet"));
}
@Test
public void testFilterClassLoaderPositive() {
options.setExclClassloader("org.jacoco.agent.SomeWhere$*");
CoverageTransformer t = createTransformer();
assertTrue(t.filter(classLoader, "org/example/Foo"));
}
@Test
public void testFilterClassLoaderNegative() {
options.setExclClassloader("org.jacoco.agent.rt.internal.CoverageTransformerTest$*");
CoverageTransformer t = createTransformer();
ClassLoader myClassLoader = new ClassLoader(null) {
};
assertFalse(t.filter(myClassLoader, "org/example/Foo"));
}
@Test
public void testFilterIncludedClassPositive() {
options.setIncludes("org.jacoco.core.*:org.jacoco.agent.rt.*");
CoverageTransformer t = createTransformer();
assertTrue(t.filter(classLoader, "org/jacoco/core/Foo"));
}
@Test
public void testFilterIncludedClassNegative() {
options.setIncludes("org.jacoco.core.*:org.jacoco.agent.rt.*");
CoverageTransformer t = createTransformer();
assertFalse(t.filter(classLoader, "org/jacoco/report/Foo"));
}
@Test
public void testFilterExcludedClassPositive() {
options.setExcludes("*Test");
CoverageTransformer t = createTransformer();
assertFalse(t.filter(classLoader, "org/jacoco/core/FooTest"));
}
@Test
public void testFilterExcludedClassPositiveInner() {
options.setExcludes("org.jacoco.example.Foo$Inner");
CoverageTransformer t = createTransformer();
assertFalse(t.filter(classLoader, "org/jacoco/example/Foo$Inner"));
}
@Test
public void testFilterExcludedClassNegative() {
options.setExcludes("*Test");
CoverageTransformer t = createTransformer();
assertTrue(t.filter(classLoader, "org/jacoco/core/Foo"));
}
@Test
public void testTransformFiltered() throws IllegalClassFormatException {
CoverageTransformer t = createTransformer();
assertNull(t.transform(null, "org.jacoco.Sample", null, null,
new byte[0]));
}
@Test
public void testTransformFailure() {
CoverageTransformer t = createTransformer();
try {
t.transform(classLoader, "org.jacoco.Sample", null, null, null);
fail("IllegalClassFormatException expected.");
} catch (IllegalClassFormatException e) {
assertEquals("Error while instrumenting class org.jacoco.Sample.",
e.getMessage());
}
recorder.assertException(IllegalClassFormatException.class,
"Error while instrumenting class org.jacoco.Sample.",
IOException.class);
recorder.clear();
}
@Test
public void testRedefinedClass() throws Exception {
CoverageTransformer t = createTransformer();
// Just pick any non-system class outside our namespace
final Class<?> target = JaCoCo.class;
assertNull(t.transform(classLoader, target.getName(), target, null,
getClassData(target)));
}
private CoverageTransformer createTransformer() {
return new CoverageTransformer(runtime, options, recorder);
}
private static byte[] getClassData(Class<?> clazz) throws IOException {
final String resource = "/" + clazz.getName().replace('.', '/')
+ ".class";
final InputStream in = clazz.getResourceAsStream(resource);
final ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buffer = new byte[0x100];
int len;
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
in.close();
return out.toByteArray();
}
private static class StubRuntime extends AbstractRuntime {
public StubRuntime() {
}
public int generateDataAccessor(long classid, String classname,
int probecount, MethodVisitor mv) {
return 0;
}
public void shutdown() {
}
}
}
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