Github user pdxrunner commented on a diff in the pull request: https://github.com/apache/geode/pull/699#discussion_r132497014 --- Diff: geode-core/src/test/java/org/apache/geode/internal/process/NonBlockingProcessStreamReaderIntegrationTest.java --- @@ -0,0 +1,182 @@ +/* + * 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.geode.internal.process; + +import static org.apache.geode.internal.process.ProcessStreamReader.ReadingMode.NON_BLOCKING; +import static org.apache.geode.internal.process.ProcessUtils.isProcessAlive; +import static org.assertj.core.api.Assertions.assertThat; + +import org.junit.Before; +import org.junit.Test; +import org.junit.experimental.categories.Category; + +import org.apache.geode.internal.process.ProcessStreamReader.Builder; +import org.apache.geode.test.junit.categories.IntegrationTest; + +/** + * Functional integration tests for NonBlockingProcessStreamReader which was introduced to fix TRAC + * #51967. + * + * @see BlockingProcessStreamReaderIntegrationTest + * @see BlockingProcessStreamReaderWindowsTest + * + * @since GemFire 8.2 + */ +@Category(IntegrationTest.class) +public class NonBlockingProcessStreamReaderIntegrationTest + extends BaseProcessStreamReaderIntegrationTest { + + private StringBuffer stdoutBuffer; + private StringBuffer stderrBuffer; + + @Before + public void before() { + stdoutBuffer = new StringBuffer(); + stderrBuffer = new StringBuffer(); + } + + /** + * This test hangs on Windows if the implementation is blocking instead of non-blocking. + */ + @Test + public void canCloseStreamsWhileProcessIsAlive() throws Exception { + // arrange + process = new ProcessBuilder(createCommandLine(ProcessSleeps.class)).start(); + stdout = new Builder(process).inputStream(process.getInputStream()).readingMode(NON_BLOCKING) + .build().start(); + stderr = new Builder(process).inputStream(process.getErrorStream()).readingMode(NON_BLOCKING) --- End diff -- It looks like there may be an opportunity to extract a method from the common code from the beginning of each test. Yes, there are some variations on setting stdout and stderr, so maybe a couple methods to avoid duplicated code?
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