6591a6501c
Motivation: If something is mis-configured, the "main" test will fail but it is unclear whether it fails because the integration does not work or it wasn't applied at all. Also see: https://github.com/netty/netty/issues/9738#issuecomment-548416693 Modifications: This change adds a test that uses the same mechanism as BlockHound does (`ServiceLoader`) and checks that `NettyBlockHoundIntegration` is present. Result: It is now clear whether the integration is not working or it wasn't loaded at all.
70 lines
2.3 KiB
Java
70 lines
2.3 KiB
Java
/*
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* Copyright 2019 The Netty Project
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.util.internal;
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import io.netty.util.concurrent.GlobalEventExecutor;
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import io.netty.util.internal.Hidden.NettyBlockHoundIntegration;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import reactor.blockhound.BlockHound;
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import reactor.blockhound.integration.BlockHoundIntegration;
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import java.util.ServiceLoader;
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import java.util.concurrent.ExecutionException;
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import java.util.concurrent.FutureTask;
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import java.util.concurrent.TimeUnit;
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import static org.junit.Assert.assertNotNull;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assert.fail;
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public class NettyBlockHoundIntegrationTest {
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@BeforeClass
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public static void setUpClass() {
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BlockHound.install();
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}
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@Test
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public void testServiceLoader() {
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for (BlockHoundIntegration integration : ServiceLoader.load(BlockHoundIntegration.class)) {
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if (integration instanceof NettyBlockHoundIntegration) {
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return;
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}
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}
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fail("NettyBlockHoundIntegration cannot be loaded with ServiceLoader");
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}
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@Test
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public void testBlockingCallsInNettyThreads() throws Exception {
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final FutureTask<Void> future = new FutureTask<>(() -> {
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Thread.sleep(0);
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return null;
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});
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GlobalEventExecutor.INSTANCE.execute(future);
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try {
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future.get(5, TimeUnit.SECONDS);
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fail("Expected an exception due to a blocking call but none was thrown");
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} catch (ExecutionException e) {
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Throwable throwable = e.getCause();
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assertNotNull("An exception was thrown", throwable);
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assertTrue("Blocking call was reported", throwable.getMessage().contains("Blocking call"));
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}
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}
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}
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