jdk/test/langtools/jdk/jshell/LocalStopExecutionTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8355323
 * @summary Verify local execution can stop execution when there are no backward branches
 * @modules jdk.jshell/jdk.internal.jshell.tool
 * @build KullaTesting TestingInputStream
 * @run junit LocalStopExecutionTest
 */

import java.io.IOException;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.Random;
import java.util.concurrent.CountDownLatch;

import jdk.internal.jshell.tool.StopDetectingInputStream;
import jdk.internal.jshell.tool.StopDetectingInputStream.State;
import jdk.jshell.JShell;

import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class LocalStopExecutionTest extends AbstractStopExecutionTest {

    @BeforeEach
    @Override
    public void setUp() {
        setUp(b -> b.executionEngine("local"));
    }

    @Test
    public void testVeryLongRecursion() throws InterruptedException {
        scheduleStop(
            """
            // Note: there are no backward branches in this class
            new Runnable() {
                public void run() {
                    recurse(1);
                    recurse(10);
                    recurse(100);
                    recurse(1000);
                    recurse(10000);
                    recurse(100000);
                    recurse(1000000);
                }
                public void recurse(int depth) {
                    if (depth == 0)
                        return;
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                    recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1); recurse(depth - 1);
                }
            }.run();
            """
        );
    }
}