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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang3.concurrent;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.stream.Collectors;
import org.apache.commons.lang3.AbstractLangTest;
import org.apache.commons.lang3.exception.UncheckedInterruptedException;
import org.junit.jupiter.api.Test;
/**
* Tests {@link UncheckedFuture}.
*/
public class UncheckedFutureTest extends AbstractLangTest {
private static class TestFuture<V> extends AbstractFutureProxy<V> {
private final Exception exception;
TestFuture(final Exception throwable) {
super(ConcurrentUtils.constantFuture(null));
this.exception = throwable;
}
TestFuture(final V value) {
super(ConcurrentUtils.constantFuture(value));
this.exception = null;
}
@SuppressWarnings("unchecked") // Programming error if call site blows up at runtime.
private <T extends Exception> void checkException() throws T {
if (exception != null) {
throw (T) exception;
}
}
@Override
public V get() throws InterruptedException, ExecutionException {
checkException();
return super.get();
}
@Override
public V get(final long timeout, final TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
checkException();
return super.get(timeout, unit);
}
}
@Test
public void testGetExecutionException() {
final ExecutionException e = new ExecutionException(new Exception());
assertThrows(UncheckedExecutionException.class, () -> UncheckedFuture.on(new TestFuture<>(e)).get());
}
@Test
public void testGetInterruptedException() {
final InterruptedException e = new InterruptedException();
assertThrows(UncheckedInterruptedException.class, () -> UncheckedFuture.on(new TestFuture<>(e)).get());
}
@Test
public void testGetLongExecutionException() {
final ExecutionException e = new ExecutionException(new Exception());
assertThrows(UncheckedExecutionException.class, () -> UncheckedFuture.on(new TestFuture<>(e)).get(1, TimeUnit.MICROSECONDS));
}
@Test
public void testGetLongInterruptedException() {
final InterruptedException e = new InterruptedException();
assertThrows(UncheckedInterruptedException.class, () -> UncheckedFuture.on(new TestFuture<>(e)).get(1, TimeUnit.MICROSECONDS));
}
@Test
public void testGetLongTimeoutException() {
final TimeoutException e = new TimeoutException();
assertThrows(UncheckedTimeoutException.class, () -> UncheckedFuture.on(new TestFuture<>(e)).get(1, TimeUnit.MICROSECONDS));
}
@Test
public void testMap() {
final List<String> expected = Arrays.asList("Y", "Z");
final List<Future<String>> input = Arrays.asList(new TestFuture<>("Y"), new TestFuture<>("Z"));
assertEquals(expected, UncheckedFuture.map(input).map(UncheckedFuture::get).collect(Collectors.toList()));
}
@Test
public void testOnCollection() {
final List<String> expected = Arrays.asList("Y", "Z");
final List<Future<String>> input = Arrays.asList(new TestFuture<>("Y"), new TestFuture<>("Z"));
assertEquals(expected, UncheckedFuture.on(input).stream().map(UncheckedFuture::get).collect(Collectors.toList()));
}
@Test
public void testOnFuture() {
assertEquals("Z", UncheckedFuture.on(new TestFuture<>("Z")).get());
}
}
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