/*
* 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.beam.fn.harness.test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.beam.fn.harness.test.TestExecutors.TestExecutorService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.junit.runners.model.Statement;
/** Tests for {@link TestExecutors}. */
@RunWith(JUnit4.class)
public class TestExecutorsTest {
@Test
public void testSuccessfulTermination() throws Throwable {
ExecutorService service = Executors.newSingleThreadExecutor();
final TestExecutorService testService = TestExecutors.from(() -> service);
final AtomicBoolean taskRan = new AtomicBoolean();
testService
.apply(
new Statement() {
@Override
public void evaluate() throws Throwable {
testService.submit(() -> taskRan.set(true));
}
},
null)
.evaluate();
assertTrue(service.isTerminated());
assertTrue(taskRan.get());
}
@Test
public void testTaskBlocksForeverCausesFailure() throws Throwable {
ExecutorService service = Executors.newSingleThreadExecutor();
final TestExecutorService testService = TestExecutors.from(() -> service);
final AtomicBoolean taskStarted = new AtomicBoolean();
final AtomicBoolean taskWasInterrupted = new AtomicBoolean();
try {
testService
.apply(
new Statement() {
@Override
public void evaluate() throws Throwable {
testService.submit(this::taskToRun);
}
private void taskToRun() {
taskStarted.set(true);
try {
while (true) {
Thread.sleep(10000);
}
} catch (InterruptedException e) {
taskWasInterrupted.set(true);
return;
}
}
},
null)
.evaluate();
fail();
} catch (IllegalStateException e) {
assertEquals(IllegalStateException.class, e.getClass());
assertEquals("Test executor failed to shutdown cleanly.", e.getMessage());
}
assertTrue(service.isShutdown());
}
@Test
public void testStatementFailurePropagatedCleanly() throws Throwable {
ExecutorService service = Executors.newSingleThreadExecutor();
final TestExecutorService testService = TestExecutors.from(() -> service);
final RuntimeException exceptionToThrow = new RuntimeException();
try {
testService
.apply(
new Statement() {
@Override
public void evaluate() throws Throwable {
throw exceptionToThrow;
}
},
null)
.evaluate();
fail();
} catch (RuntimeException thrownException) {
assertSame(exceptionToThrow, thrownException);
}
assertTrue(service.isShutdown());
}
@Test
public void testStatementFailurePropagatedWhenExecutorServiceFailingToTerminate()
throws Throwable {
ExecutorService service = Executors.newSingleThreadExecutor();
final TestExecutorService testService = TestExecutors.from(() -> service);
final AtomicBoolean taskStarted = new AtomicBoolean();
final AtomicBoolean taskWasInterrupted = new AtomicBoolean();
final RuntimeException exceptionToThrow = new RuntimeException();
try {
testService
.apply(
new Statement() {
@Override
public void evaluate() throws Throwable {
testService.submit(this::taskToRun);
throw exceptionToThrow;
}
private void taskToRun() {
taskStarted.set(true);
try {
while (true) {
Thread.sleep(10000);
}
} catch (InterruptedException e) {
taskWasInterrupted.set(true);
return;
}
}
},
null)
.evaluate();
fail();
} catch (RuntimeException thrownException) {
assertSame(exceptionToThrow, thrownException);
assertEquals(1, exceptionToThrow.getSuppressed().length);
assertEquals(IllegalStateException.class, exceptionToThrow.getSuppressed()[0].getClass());
assertEquals(
"Test executor failed to shutdown cleanly.",
exceptionToThrow.getSuppressed()[0].getMessage());
}
assertTrue(service.isShutdown());
}
}