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package com.oracle.graal.python.test.engine;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;

import org.graalvm.polyglot.Engine;
import org.graalvm.polyglot.Source;
import org.junit.Test;

import com.oracle.graal.python.test.PythonTests;

public class SharedEngineMultithreadingBenchmarkTest extends SharedEngineMultithreadingTestBase {
    @Test
    public void testRichardsInParallelInMultipleContexts() throws Throwable {
        try (Engine engine = Engine.newBuilder().build()) {
            File richards = PythonTests.getBenchFile(Paths.get("meso", "richards3.py"));
            Source richardsSource = getSource(richards);
            Task[] tasks = new Task[THREADS_COUNT];
            for (int taskIdx = 0; taskIdx < tasks.length; taskIdx++) {
                final int id = taskIdx;
                tasks[taskIdx] = () -> {
                    log("Running %s in thread %d", richards, id);
                    StdStreams result = run(id, engine, new String[]{richards.toString(), "2"}, ctx -> ctx.eval(richardsSource));
                    assertEquals("", result.err);
                    assertTrue(result.out, result.out.matches("finished\\.\\s+[a-zA-Z0-9/.]*\\s+took\\s+[0-9.]*\\s+s\\s+"));
                    return null;
                };
            }
            submitAndWaitAll(createExecutorService(), tasks);
        }
    }

    private static Source getSource(File file) {
        try {
            return Source.newBuilder("python", file).build();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
