test/jdk/java/lang/Process/WaitForDuration.java

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/*
 * @test
 * @bug 8336479
 * @summary Tests for Process.waitFor(Duration)
 * @library /test/lib
 * @run junit WaitForDuration
 */

import java.io.IOException;
import java.time.Duration;
import java.util.stream.Stream;
import jdk.test.lib.process.ProcessTools;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import static org.junit.jupiter.api.Assertions.*;

public class WaitForDuration {
    static Stream<Arguments> durations() {
        return Stream.of(
            Arguments.of(Duration.ZERO, 3_600_000, false),
            Arguments.of(Duration.ofSeconds(-100), 3_600_000, false),
            Arguments.of(Duration.ofSeconds(100), 0, true),
            Arguments.of(Duration.ofSeconds(Long.MAX_VALUE), 0, true), // nano overflow
            Arguments.of(Duration.ofSeconds(Long.MIN_VALUE), 3_600_000, false) // nano underflow
        );
    }

    @ParameterizedTest
    @MethodSource("durations")
    void testEdgeDurations(Duration d, int sleepMillis, boolean expected)
            throws IOException, InterruptedException {
        var child = ProcessTools.createTestJavaProcessBuilder(
            WaitForDuration.class.getSimpleName(), Integer.toString(sleepMillis))
                .start();
        try {
            assertEquals(expected, child.waitFor(d));
        } finally {
            child.destroy();
        }
    }

    @Test
    void testNullDuration() throws IOException, InterruptedException {
        var pb = ProcessTools.createTestJavaProcessBuilder(
            WaitForDuration.class.getSimpleName(), "0");
        assertThrows(NullPointerException.class, () -> pb.start().waitFor(null));
    }

    public static void main(String... args) throws InterruptedException {
        Thread.sleep(Integer.parseInt(args[0]));
    }
}