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/*******************************************************************************
* Copyright (c) 2009, 2019 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:
* Evgeny Mandrikov - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.test.validation.java7.targets;
import static org.jacoco.core.test.validation.targets.Stubs.f;
import static org.jacoco.core.test.validation.targets.Stubs.nop;
import java.io.Closeable;
import java.io.IOException;
/**
* This test target is a try-with-resources statement.
*/
public class TryWithResourcesTarget {
private static class Resource implements Closeable {
@Override
public void close() {
}
}
/**
* Closing performed using {@link org.objectweb.asm.Opcodes#INVOKEVIRTUAL}
* or {@link org.objectweb.asm.Opcodes#INVOKEINTERFACE} depending on a class
* of resource.
*/
private static Object test() throws Exception {
nop(); // assertFullyCovered()
try ( // assertTry()
Resource r1 = new Resource(); // assertFullyCovered()
Closeable r2 = new Resource(); // assertFullyCovered()
AutoCloseable r3 = new Resource() // assertFullyCovered()
) {
return read(r1, r2, r3); // assertFullyCovered()
/* without filter next line has branches: */
} // assertEmpty()
catch (Exception e) {
nop(); // assertNotCovered()
throw e;
} finally {
nop(); // assertFullyCovered()
}
}
private static void test2() throws Exception {
nop(); // assertFullyCovered()
try ( // assertTry()
Resource r1 = new Resource(); // assertFullyCovered()
Closeable r2 = new Resource(); // assertFullyCovered()
AutoCloseable r3 = new Resource() // assertFullyCovered()
) {
read(r1, r2, r3); // assertFullyCovered()
/* without filter next line has branches: */
} // assertEmpty()
catch (Exception e) {
nop(); // assertNotCovered()
} finally {
nop(); // assertFullyCovered()
}
nop(); // assertFullyCovered()
}
private static Object returnInBody() throws IOException {
try ( // assertTry()
Closeable r = new Resource() // assertFullyCovered()
) {
return read(r); // assertFullyCovered()
} // assertReturnInBodyClose()
}
private static void nested() {
try ( // assertTry()
Resource r1 = new Resource() // assertFullyCovered()
) {
try ( // assertTry()
Resource r2 = new Resource() // assertFullyCovered()
) {
nop(r1.toString() + r2.toString()); // assertFullyCovered()
} // assertEmpty()
catch (Exception e) {
nop(); // assertNotCovered()
} finally {
nop(); // assertFullyCovered()
}
} // assertEmpty()
catch (Exception e) {
nop(); // assertNotCovered()
} finally {
try ( // assertTry()
Resource r2 = new Resource() // assertFullyCovered()
) {
nop(r2); // assertFullyCovered()
} // assertEmpty()
catch (Exception e) {
nop(); // assertNotCovered()
} finally {
nop(); // assertFullyCovered()
}
}
}
/**
* In this case bytecode will contain 3 copies of <code>finally</code>
* block, each containing 2 branches, resulting in 6 branches in total. One
* could think that this is artifact of try-with-resources, but the same
* happens without it.
*/
private static Object returnInCatch() {
try ( // assertTry()
Resource r = new Resource() // assertFullyCovered()
) {
read(r);
/* without filter next line has branches: */
} // assertEmpty()
catch (Exception e) {
return null;
} finally {
nop(!f()); // assertPartlyCovered(1, 1)
}
try { // assertEmpty()
read(new Resource());
} catch (Exception e) {
return null;
} finally {
nop(!f()); // assertPartlyCovered(1, 1)
}
return null;
}
private static Object read(Object r1, Object r2, Object r3) {
return r1.toString() + r2.toString() + r3.toString();
}
private static Object read(Object r1) {
return r1.toString();
}
/*
* Corner cases
*/
private static void empty() throws Exception {
try ( // assertTry()
Closeable r = new Resource() // assertFullyCovered()
) {
} // assertEmptyClose()
}
private static void handwritten() throws IOException {
Closeable r = new Resource();
Throwable primaryExc = null;
try {
nop(r);
} catch (Throwable t) {
primaryExc = t;
throw t;
} finally {
if (r != null) { // assertHandwritten()
if (primaryExc != null) {
try {
r.close();
} catch (Throwable suppressedExc) {
primaryExc.addSuppressed(suppressedExc);
}
} else {
r.close();
}
}
}
}
private static void throwInBody() throws IOException {
try ( // assertNotCovered()
Closeable r = new Resource()) {
nop(r);
throw new RuntimeException();
} // assertThrowInBodyClose()
}
public static void main(String[] args) throws Exception {
test();
test2();
returnInBody();
nested();
returnInCatch();
empty();
handwritten();
}
}
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