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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 4129479 8342086
 * @summary Test that available throws an IOException if the stream is
 *          closed, and that available works correctly with the NUL
 *          device on Windows
 * @run junit Available
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.condition.EnabledOnOs;
import org.junit.jupiter.api.condition.OS;
import static org.junit.jupiter.api.Assertions.*;

public class Available {
    @Test
    void throwAfterClose() throws IOException {
        File file = new File(System.getProperty("test.src", "."),
                             "Available.java");
        FileInputStream fis = new FileInputStream(file);
        fis.close();
        assertThrows(IOException.class, () -> fis.available());
    }

    @Test
    @EnabledOnOs(OS.WINDOWS)
    void nulDevice() throws IOException {
        File file = new File("nul");
        FileInputStream fis = new FileInputStream(file);
        int n = fis.available();
        assertEquals(0, n, "available() returned non-zero value");
    }
}