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/*******************************************************************************
* Copyright (c) 2009, 2021 Mountainminds GmbH & Co. KG and Contributors
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.runtime;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import org.jacoco.core.JaCoCo;
import org.jacoco.core.instr.MethodRecorder;
import org.jacoco.core.internal.instr.InstrSupport;
import org.jacoco.core.test.TargetLoader;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;
/**
* Unit tests for {@link OfflineInstrumentationAccessGenerator}.
*/
public class OfflineInstrumentationAccessGeneratorTest {
private IExecutionDataAccessorGenerator generator;
private static boolean[] probes;
// runtime stub
public static boolean[] getProbes(final long classid,
final String classname, final int probecount) {
return probes;
}
@BeforeClass
public static void setupClass() {
probes = new boolean[3];
}
@Before
public void setup() {
String name = getClass().getName().replace('.', '/');
generator = new OfflineInstrumentationAccessGenerator(name);
}
@Test
public void testRuntimeAccess() throws Exception {
ITarget target = generateAndInstantiateClass(123);
assertSame(probes, target.get());
}
@Test
public void testRuntimeClassName() throws Exception {
generator = new OfflineInstrumentationAccessGenerator();
MethodRecorder actual = new MethodRecorder();
generator.generateDataAccessor(987654321, "foo/Bar", 17,
actual.getVisitor());
MethodRecorder expected = new MethodRecorder();
expected.getVisitor().visitLdcInsn(Long.valueOf(987654321));
expected.getVisitor().visitLdcInsn("foo/Bar");
expected.getVisitor().visitIntInsn(Opcodes.BIPUSH, 17);
String rtname = JaCoCo.RUNTIMEPACKAGE.replace('.', '/') + "/Offline";
expected.getVisitor().visitMethodInsn(Opcodes.INVOKESTATIC, rtname,
"getProbes", "(JLjava/lang/String;I)[Z", false);
assertEquals(expected, actual);
}
/**
* Creates a new class with the given id, loads this class and instantiates
* it. The constructor of the generated class will request the probe array
* from the access generator under test.
*/
private ITarget generateAndInstantiateClass(int classid)
throws InstantiationException, IllegalAccessException {
final String className = "org/jacoco/test/targets/RuntimeTestTarget_"
+ classid;
Type classType = Type.getObjectType(className);
final ClassWriter writer = new ClassWriter(0);
writer.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC, className, null,
"java/lang/Object",
new String[] { Type.getInternalName(ITarget.class) });
writer.visitField(InstrSupport.DATAFIELD_ACC,
InstrSupport.DATAFIELD_NAME, InstrSupport.DATAFIELD_DESC, null,
null);
// Constructor
GeneratorAdapter gen = new GeneratorAdapter(
writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null,
new String[0]),
Opcodes.ACC_PUBLIC, "<init>", "()V");
gen.visitCode();
gen.loadThis();
gen.invokeConstructor(Type.getType(Object.class),
new Method("<init>", "()V"));
gen.loadThis();
final int size = generator.generateDataAccessor(classid, className, 2,
gen);
gen.putStatic(classType, InstrSupport.DATAFIELD_NAME,
Type.getObjectType(InstrSupport.DATAFIELD_DESC));
gen.returnValue();
gen.visitMaxs(size + 1, 0);
gen.visitEnd();
// get()
gen = new GeneratorAdapter(writer.visitMethod(Opcodes.ACC_PUBLIC, "get",
"()[Z", null, new String[0]), Opcodes.ACC_PUBLIC, "get",
"()[Z");
gen.visitCode();
gen.getStatic(classType, InstrSupport.DATAFIELD_NAME,
Type.getObjectType(InstrSupport.DATAFIELD_DESC));
gen.returnValue();
gen.visitMaxs(1, 0);
gen.visitEnd();
writer.visitEnd();
final TargetLoader loader = new TargetLoader();
return (ITarget) loader
.add(className.replace('/', '.'), writer.toByteArray())
.newInstance();
}
/**
* With this interface access read coverage data of the generated class.
*/
public interface ITarget {
/**
* Returns a reference to the probe array.
*
* @return the probe array
*/
boolean[] get();
}
}
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