russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
86 lines
3.2 KiB
Java
86 lines
3.2 KiB
Java
/*
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* Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8340830
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* @summary Check if writing to Console is not blocked by other thread's read.
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* This test relies on sleep(1000) to ensure that readLine() is
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* invoked before printf(), which may not always occur.
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* @library /test/lib
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* @requires (os.family == "linux" | os.family == "mac")
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* @run junit ReadWriteBlockingTest
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*/
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import java.nio.file.Files;
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import java.nio.file.Path;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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import org.junit.jupiter.api.Assumptions;
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import org.junit.jupiter.api.condition.EnabledOnOs;
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import org.junit.jupiter.api.condition.OS;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.ValueSource;
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public class ReadWriteBlockingTest {
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@ParameterizedTest
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@ValueSource(strings = {"java.base", "jdk.internal.le"})
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@EnabledOnOs({OS.LINUX, OS.MAC})
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public void testReadWriteBlocking(String consoleModule) throws Exception {
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// check "expect" command availability
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var expect = Path.of("/usr/bin/expect");
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if (!Files.exists(expect) || !Files.isExecutable(expect)) {
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Assumptions.abort("'" + expect + "' not found");
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}
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// invoking "expect" command
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var testSrc = System.getProperty("test.src", ".");
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var testClasses = System.getProperty("test.classes", ".");
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var jdkDir = System.getProperty("test.jdk");
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OutputAnalyzer output = ProcessTools.executeProcess(
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"/usr/bin/expect",
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"-n",
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testSrc + "/readWriteBlocking.exp",
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jdkDir + "/bin/java",
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"-classpath", testClasses,
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"-Djdk.console=" + consoleModule,
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"ReadWriteBlockingTest");
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output.reportDiagnosticSummary();
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output.shouldHaveExitValue(0);
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}
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public static void main(String... args) {
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var con = System.console();
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Thread.ofVirtual().start(() -> {
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try {
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// give some time for main thread to invoke readLine()
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Thread.sleep(1000);
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} catch (InterruptedException _) {}
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con.printf("printf() invoked");
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});
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con.readLine("");
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}
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}
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