package org.apache.maven.surefire.booter; /* * 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. */ import org.apache.maven.surefire.testset.TestSetFailedException; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintStream; import java.io.UnsupportedEncodingException; import java.nio.ByteBuffer; import java.util.Iterator; import java.util.NoSuchElementException; import java.util.concurrent.BlockingQueue; import java.util.concurrent.CountDownLatch; import java.util.concurrent.ExecutionException; import java.util.concurrent.FutureTask; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.TimeUnit; import static org.apache.maven.surefire.util.internal.StringUtils.ISO_8859_1; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import static org.hamcrest.MatcherAssert.assertThat; import static org.hamcrest.Matchers.is; import static org.fest.assertions.Assertions.assertThat; /** * Testing singleton {@code MasterProcessReader} in multiple class loaders. * * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a> * @since 2.19 */ @RunWith( NewClassLoaderRunner.class ) public class CommandReaderTest { private final BlockingQueue<Byte> blockingStream = new LinkedBlockingQueue<Byte>(); private InputStream realInputStream; private CommandReader reader; static class A { } static class B { } static class C { } static class D { } @Before public void init() throws UnsupportedEncodingException { Thread.interrupted(); realInputStream = System.in; addTestToPipeline( getClass().getName() ); System.setIn( new SystemInputStream() ); reader = CommandReader.getReader(); } @After public void deinit() { reader.stop(); System.setIn( realInputStream ); } @Test public void readJustOneClass() throws Exception { Iterator<String> it = reader.getIterableClasses( nul() ).iterator(); assertTrue( it.hasNext() ); assertThat( it.next(), is( getClass().getName() ) ); reader.stop(); assertFalse( it.hasNext() ); try { it.next(); fail(); } catch ( NoSuchElementException e ) { // expected } } @Test public void manyClasses() throws Exception { Iterator<String> it1 = reader.getIterableClasses( nul() ).iterator(); assertThat( it1.next(), is( getClass().getName() ) ); addTestToPipeline( A.class.getName() ); assertThat( it1.next(), is( A.class.getName() ) ); addTestToPipeline( B.class.getName() ); assertThat( it1.next(), is( B.class.getName() ) ); addTestToPipeline( C.class.getName() ); assertThat( it1.next(), is( C.class.getName() ) ); addEndOfPipeline(); addTestToPipeline( D.class.getName() ); assertFalse( it1.hasNext() ); } @Test public void twoIterators() throws Exception { Iterator<String> it1 = reader.getIterableClasses( nul() ).iterator(); assertThat( it1.next(), is( getClass().getName() ) ); addTestToPipeline( A.class.getName() ); assertThat( it1.next(), is( A.class.getName() ) ); addTestToPipeline( B.class.getName() ); TimeUnit.MILLISECONDS.sleep( 200 ); // give the test chance to fail Iterator<String> it2 = reader.iterated(); assertThat( it1.next(), is( B.class.getName() ) ); addTestToPipeline( C.class.getName() ); assertThat( it2.hasNext(), is( true ) ); assertThat( it2.next(), is( getClass().getName() ) ); assertThat( it2.hasNext(), is( true ) ); assertThat( it2.next(), is( A.class.getName() ) ); assertThat( it2 ).isEmpty(); assertThat( it1.next(), is( C.class.getName() ) ); addEndOfPipeline(); assertThat( it1 ).isEmpty(); } @Test( expected = NoSuchElementException.class ) public void stopBeforeReadInThread() throws Throwable { Runnable runnable = new Runnable() { @Override public void run() { Iterator<String> it = reader.getIterableClasses( nul() ).iterator(); assertThat( it.next(), is( CommandReaderTest.class.getName() ) ); } }; FutureTask<Object> futureTask = new FutureTask<Object>( runnable, null ); Thread t = new Thread( futureTask ); reader.stop(); t.start(); try { futureTask.get(); } catch ( ExecutionException e ) { throw e.getCause(); } } @Test public void readTwoClassesInThread() throws Throwable { final CountDownLatch counter = new CountDownLatch( 1 ); Runnable runnable = new Runnable() { @Override public void run() { Iterator<String> it = reader.getIterableClasses( nul() ).iterator(); assertThat( it.next(), is( CommandReaderTest.class.getName() ) ); counter.countDown(); assertThat( it.next(), is( PropertiesWrapperTest.class.getName() ) ); } }; FutureTask<Object> futureTask = new FutureTask<Object>( runnable, null ); Thread t = new Thread( futureTask ); t.start(); counter.await(); addTestToPipeline( PropertiesWrapperTest.class.getName() ); try { futureTask.get(); } catch ( ExecutionException e ) { throw e.getCause(); } } @Test( timeout = 15000 ) public void shouldAwaitReaderUp() throws TestSetFailedException { assertTrue( reader.awaitStarted() ); reader.stop(); assertFalse( reader.awaitStarted() ); } private class SystemInputStream extends InputStream { @Override public int read() throws IOException { try { return CommandReaderTest.this.blockingStream.take(); } catch ( InterruptedException e ) { throw new IOException( e ); } } } private void addTestToPipeline( String cls ) throws UnsupportedEncodingException { byte[] clazz = cls.getBytes( ISO_8859_1 ); ByteBuffer buffer = ByteBuffer.allocate( 8 + clazz.length ) .putInt( MasterProcessCommand.RUN_CLASS.getId() ) .putInt( clazz.length ) .put( clazz ); buffer.rewind(); for ( ; buffer.hasRemaining(); ) { blockingStream.add( buffer.get() ); } } private void addEndOfPipeline() throws UnsupportedEncodingException { ByteBuffer buffer = ByteBuffer.allocate( 8 ) .putInt( MasterProcessCommand.TEST_SET_FINISHED.getId() ) .putInt( 0 ); buffer.rewind(); for ( ; buffer.hasRemaining(); ) { blockingStream.add( buffer.get() ); } } private static PrintStream nul() { return new PrintStream( new ByteArrayOutputStream() ); } }