Quelle StopExecutionTest.java Sprache: JAVA

/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 8171385
* @summary Test JShell#stop
* @modules jdk.jshell/jdk.internal.jshell.tool
* @build KullaTesting TestingInputStream
* @run testng StopExecutionTest
*/

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Random;
import java.util.concurrent.CountDownLatch;
import java.util.function.Consumer;

import jdk.internal.jshell.tool.StopDetectingInputStream;
import jdk.internal.jshell.tool.StopDetectingInputStream.State;
import jdk.jshell.JShell;
import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;

@Test
public class StopExecutionTest extends KullaTesting {

    private final Object lock = new Object();
    private boolean isStopped;

    @Test(enabled = false) // TODO 8129546
    public void testStopLoop() throws InterruptedException {
        scheduleStop("while (true) ;");
    }

    @Test(enabled = false) // TODO 8129546
    public void testStopASleep() throws InterruptedException {
        scheduleStop("while (true) { try { Thread.sleep(100); } catch (InterruptedException ex) { } }");
    }

    @Test(enabled = false) // TODO 8129546
    public void testScriptCatchesStop() throws Exception {
        scheduleStop("for (int i = 0; i < 30; i++) { try { Thread.sleep(100); } catch (Throwable ex) { } }");
    }

    private void scheduleStop(String src) throws InterruptedException {
        JShell state = getState();
        isStopped = false;
        StringWriter writer = new StringWriter();
        PrintWriter out = new PrintWriter(writer);
        Thread t = new Thread(() -> {
            int i = 1;
            int n = 30;
            synchronized (lock) {
                do {
                    state.stop();
                    if (!isStopped) {
                        out.println("Not stopped. Try again: " + i);
                        try {
                            lock.wait(1000);
                        } catch (InterruptedException ignored) {
                        }
                    }
                } while (i++ < n && !isStopped);
                if (!isStopped) {
                    System.err.println(writer.toString());
                    fail("Evaluation was not stopped: '" + src + "'");
                }
            }
        });
        t.start();
        assertEval(src);
        synchronized (lock) {
            out.println("Evaluation was stopped successfully: '" + src + "'");
            isStopped = true;
            lock.notify();
        }
        // wait until the background thread finishes to prevent from calling 'stop' on closed state.
        t.join();
    }

    public void testStopDetectingInputRandom() throws IOException {
        long seed = System.nanoTime();
        Random r = new Random(seed);

        for (int m = 0; m < 10; m++) {
            StopDetectingInputStream buffer = new StopDetectingInputStream(null, null);

            buffer.setState(State.BUFFER);

            for (int i = 0; i < 1000; i++) {
                int chunkSize = r.nextInt(StopDetectingInputStream.INITIAL_SIZE * 3);

                doChunk(buffer, chunkSize);
            }
        }
    }

    private void doChunk(StopDetectingInputStream buffer, int chunkSize) throws IOException {
        for (int c = 0; c < chunkSize; c++) {
            buffer.write(c);
        }

        for (int c = 0; c < chunkSize; c++) {
            int read = buffer.read();

            assertEquals(read, c);
        }
    }

    public void testStopDetectingInputBufferWaitStop() throws Exception {
        Runnable shouldNotHappenRun =
                () -> { throw new AssertionError("Should not happen."); };
        Consumer<Exception> shouldNotHappenExc =
                exc -> { throw new AssertionError("Should not happen.", exc); };
        StopDetectingInputStream sd = new StopDetectingInputStream(shouldNotHappenRun, shouldNotHappenExc);
        CountDownLatch reading = new CountDownLatch(1);
        PipedInputStream is = new PipedInputStream() {
            @Override
            public int read() throws IOException {
                reading.countDown();
                return super.read();
            }
        };
        PipedOutputStream os = new PipedOutputStream(is);

        sd.setInputStream(is);
        sd.setState(State.BUFFER);
        reading.await();
        sd.setState(State.WAIT);
        os.write(3);
        int value = sd.read();

        if (value != 3) {
            throw new AssertionError();
        }
    }
}

quality69%

¤ Dauer der Verarbeitung: 0.12 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.