jdk-24/test/jdk/java/util/concurrent/Future/DefaultMethods.java
Alan Bateman 9583e3657e 8284161: Implementation of Virtual Threads (Preview)
Co-authored-by: Ron Pressler <rpressler@openjdk.org>
Co-authored-by: Alan Bateman <alanb@openjdk.org>
Co-authored-by: Erik Österlund <eosterlund@openjdk.org>
Co-authored-by: Andrew Haley <aph@openjdk.org>
Co-authored-by: Rickard Bäckman <rbackman@openjdk.org>
Co-authored-by: Markus Grönlund <mgronlun@openjdk.org>
Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org>
Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org>
Co-authored-by: Chris Plummer <cjplummer@openjdk.org>
Co-authored-by: Coleen Phillimore <coleenp@openjdk.org>
Co-authored-by: Robbin Ehn <rehn@openjdk.org>
Co-authored-by: Stefan Karlsson <stefank@openjdk.org>
Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org>
Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org>
Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
2022-05-07 08:06:16 +00:00

228 lines
7.8 KiB
Java

/*
* Copyright (c) 2021, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @summary Test Future's default methods
* @library ../lib
* @run testng DefaultMethods
*/
import java.util.concurrent.*;
import static java.util.concurrent.Future.State.*;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
public class DefaultMethods {
@DataProvider(name = "executors")
public Object[][] executors() {
return new Object[][] {
// ensures that default implementation is tested
{ new DelegatingExecutorService(Executors.newCachedThreadPool()), },
// executors that may return a Future that overrides the methods
{ new ForkJoinPool(), },
{ Executors.newCachedThreadPool(), }
};
}
/**
* Test methods when the task has not completed.
*/
@Test(dataProvider = "executors")
public void testRunningTask(ExecutorService executor) {
try (executor) {
var latch = new CountDownLatch(1);
Future<?> future = executor.submit(() -> { latch.await(); return null; });
try {
assertTrue(future.state() == RUNNING);
expectThrows(IllegalStateException.class, future::resultNow);
expectThrows(IllegalStateException.class, future::exceptionNow);
} finally {
latch.countDown();
}
}
}
/**
* Test methods when the task has already completed with a result.
*/
@Test(dataProvider = "executors")
public void testCompletedTask1(ExecutorService executor) {
try (executor) {
Future<String> future = executor.submit(() -> "foo");
awaitDone(future);
assertTrue(future.state() == SUCCESS);
assertEquals(future.resultNow(), "foo");
expectThrows(IllegalStateException.class, future::exceptionNow);
}
}
/**
* Test methods when the task has already completed with null.
*/
@Test(dataProvider = "executors")
public void testCompletedTask2(ExecutorService executor) {
try (executor) {
Future<String> future = executor.submit(() -> null);
awaitDone(future);
assertTrue(future.state() == SUCCESS);
assertEquals(future.resultNow(), null);
expectThrows(IllegalStateException.class, future::exceptionNow);
}
}
/**
* Test methods when the task has completed with an exception.
*/
@Test(dataProvider = "executors")
public void testFailedTask(ExecutorService executor) {
try (executor) {
Future<?> future = executor.submit(() -> { throw new ArithmeticException(); });
awaitDone(future);
assertTrue(future.state() == FAILED);
expectThrows(IllegalStateException.class, future::resultNow);
Throwable ex = future.exceptionNow();
assertTrue(ex instanceof ArithmeticException);
}
}
/**
* Test methods when the task has been cancelled (mayInterruptIfRunning=false)
*/
@Test(dataProvider = "executors")
public void testCancelledTask1(ExecutorService executor) {
try (executor) {
var latch = new CountDownLatch(1);
Future<?> future = executor.submit(() -> { latch.await(); return null; });
future.cancel(false);
try {
assertTrue(future.state() == CANCELLED);
expectThrows(IllegalStateException.class, future::resultNow);
expectThrows(IllegalStateException.class, future::exceptionNow);
} finally {
latch.countDown();
}
}
}
/**
* Test methods when the task has been cancelled (mayInterruptIfRunning=true)
*/
@Test(dataProvider = "executors")
public void testCancelledTask2(ExecutorService executor) {
try (executor) {
var latch = new CountDownLatch(1);
Future<?> future = executor.submit(() -> { latch.await(); return null; });
future.cancel(true);
try {
assertTrue(future.state() == CANCELLED);
expectThrows(IllegalStateException.class, future::resultNow);
expectThrows(IllegalStateException.class, future::exceptionNow);
} finally {
latch.countDown();
}
}
}
/**
* Test CompletableFuture with the task has not completed.
*/
@Test
public void testCompletableFuture1() {
var future = new CompletableFuture<String>();
assertTrue(future.state() == RUNNING);
expectThrows(IllegalStateException.class, future::resultNow);
expectThrows(IllegalStateException.class, future::exceptionNow);
}
/**
* Test CompletableFuture with the task that completed with result.
*/
@Test
public void testCompletableFuture2() {
var future = new CompletableFuture<String>();
future.complete("foo");
assertTrue(future.state() == SUCCESS);
assertEquals(future.resultNow(), "foo");
expectThrows(IllegalStateException.class, future::exceptionNow);
}
/**
* Test CompletableFuture with the task that completed with null.
*/
@Test
public void testCompletableFuture3() {
var future = new CompletableFuture<String>();
future.complete(null);
assertTrue(future.state() == SUCCESS);
assertEquals(future.resultNow(), null);
expectThrows(IllegalStateException.class, future::exceptionNow);
}
/**
* Test CompletableFuture with the task that completed with exception.
*/
@Test
public void testCompletableFuture4() {
var future = new CompletableFuture<String>();
future.completeExceptionally(new ArithmeticException());
assertTrue(future.state() == FAILED);
expectThrows(IllegalStateException.class, future::resultNow);
Throwable ex = future.exceptionNow();
assertTrue(ex instanceof ArithmeticException);
}
/**
* Test CompletableFuture with the task that was cancelled.
*/
@Test
public void testCompletableFuture5() {
var future = new CompletableFuture<String>();
future.cancel(false);
assertTrue(future.state() == CANCELLED);
expectThrows(IllegalStateException.class, future::resultNow);
expectThrows(IllegalStateException.class, future::exceptionNow);
}
/**
* Waits for the future to be done.
*/
private static void awaitDone(Future<?> future) {
boolean interrupted = false;
while (!future.isDone()) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
interrupted = true;
}
}
if (interrupted) {
Thread.currentThread().interrupt();
}
}
}