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 * 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

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 */

/*

 * @test

 * @summary Shutdown tests

 * @build KullaTesting TestingInputStream

 * @run testng ShutdownTest

 */

import java.util.function.Consumer;

import jdk.jshell.JShell;

import jdk.jshell.JShell.Subscription;

import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

@Test

public class ShutdownTest extends KullaTesting {

    int shutdownCount;

    void shutdownCounter(JShell state) {

        ++shutdownCount;

    }

    @Test(enabled = false) //TODO 8139873

    public void testExit() {

        shutdownCount = 0;

        getState().onShutdown(this::shutdownCounter);

        assertEval("System.exit(1);");

        assertEquals(shutdownCount, 1);

    }

    public void testCloseCallback() {

        shutdownCount = 0;

        getState().onShutdown(this::shutdownCounter);

        getState().close();

        assertEquals(shutdownCount, 1);

    }

    public void testCloseUnsubscribe() {

        shutdownCount = 0;

        Subscription token = getState().onShutdown(this::shutdownCounter);

        getState().unsubscribe(token);

        getState().close();

        assertEquals(shutdownCount, 0);

    }

    public void testTwoShutdownListeners() {

        ShutdownListener listener1 = new ShutdownListener();

        ShutdownListener listener2 = new ShutdownListener();

        Subscription subscription1 = getState().onShutdown(listener1);

        Subscription subscription2 = getState().onShutdown(listener2);

        getState().unsubscribe(subscription1);

        getState().close();

        assertEquals(listener1.getEvents(), 0, "Checking got events");

        assertEquals(listener2.getEvents(), 1, "Checking got events");

        getState().close();

        assertEquals(listener1.getEvents(), 0, "Checking got events");

        assertEquals(listener2.getEvents(), 1, "Checking got events");

        getState().unsubscribe(subscription2);

    }

    @Test(expectedExceptions = IllegalStateException.class)

    public void testCloseException() {

        getState().close();

        getState().eval("45");

    }

    @Test(expectedExceptions = IllegalStateException.class,

          enabled = false) //TODO 8139873

    public void testShutdownException() {

        assertEval("System.exit(0);");

        getState().eval("45");

    }

    @Test(expectedExceptions = NullPointerException.class)

    public void testNullCallback() {

        getState().onShutdown(null);

    }

    @Test(expectedExceptions = IllegalStateException.class)

    public void testSubscriptionAfterClose() {

        getState().close();

        getState().onShutdown(e -> {});

    }

    @Test(expectedExceptions = IllegalStateException.class,

          enabled = false) //TODO 8139873

    public void testSubscriptionAfterShutdown() {

        assertEval("System.exit(0);");

        getState().onShutdown(e -> {});

    }

    private static class ShutdownListener implements Consumer<JShell> {

        private int count;

        @Override

        public void accept(JShell shell) {

            ++count;

        }

        public int getEvents() {

            return count;

        }

    }

}