test/jdk/java/io/Reader/Skip.java - master - githubmirror/panama-vector

test/jdk/java/io/Reader/Skip.java
110 строк4 KB
Brian Burkhalter
8379824: Refactor java/io tests to use JUnit
19 мар 2026, 22:44
19 мар 2026, 22:4480fb1f7
/*
 * Copyright (c) 1998, 2026, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
 * @bug 4134311 8247918
 * @summary Test if skip works correctly
 * @run junit Skip
*/

import java.io.CharArrayReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.PushbackReader;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.io.StringReader;
import java.util.stream.Stream;

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.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;

public class Skip {
    private static String FILENAME =
        System.getProperty("test.src", ".") + File.separator + "SkipInput.txt";
    private static File file = new File(FILENAME);

    @Test
    public void skip() throws IOException {
        try (FileReader fr = new FileReader(file)) {
            long nchars = 8200;
            long actual = fr.skip(nchars);

            assertFalse(actual > nchars,
                "Should skip " + nchars + ", but skipped " +actual+" chars");
        }
    }

    public static Reader[] readers() throws IOException {
        return new Reader[] {
            new LineNumberReader(new FileReader(file)),
            new CharArrayReader(new char[] {27}),
            new PushbackReader(new FileReader(file)),
            new FileReader(file),
            new StringReader(new String(new byte[] {(byte)42}))
        };
    }

    @ParameterizedTest
    @MethodSource("readers")
    public void eof(Reader r) throws IOException {
         r.skip(Long.MAX_VALUE);
         assertEquals(0, r.skip(1));
         assertEquals(-1, r.read());
    }

    public static Reader[] skipIAE() throws IOException {
        return new Reader[] {
            new LineNumberReader(new FileReader(file)),
            new PushbackReader(new FileReader(file)),
            new FileReader(file)
        };
    }

    @ParameterizedTest
    @MethodSource("skipIAE")
    public void testThrowsIAE(Reader r) throws IOException {
        assertThrows(IllegalArgumentException.class, () -> r.skip(-1));
    }

    public static Reader[] skipNoIAE() throws IOException {
        return new Reader[] {
            new CharArrayReader(new char[] {27}),
            new StringReader(new String(new byte[] {(byte)42}))
        };
    }

    @ParameterizedTest
    @MethodSource("skipNoIAE")
    public void testNoIAE(Reader r) throws IOException {
        r.skip(-1);
    }
}