russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
110 lines
3.6 KiB
Java
110 lines
3.6 KiB
Java
/*
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* Copyright (c) 1998, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 4134311 8247918
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* @summary Test if skip works correctly
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* @run junit Skip
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*/
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import java.io.CharArrayReader;
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import java.io.File;
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import java.io.FileReader;
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import java.io.IOException;
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import java.io.LineNumberReader;
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import java.io.PushbackReader;
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import java.io.RandomAccessFile;
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import java.io.Reader;
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import java.io.StringReader;
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import java.util.stream.Stream;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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public class Skip {
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private static String FILENAME =
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System.getProperty("test.src", ".") + File.separator + "SkipInput.txt";
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private static File file = new File(FILENAME);
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@Test
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public void skip() throws IOException {
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try (FileReader fr = new FileReader(file)) {
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long nchars = 8200;
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long actual = fr.skip(nchars);
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assertFalse(actual > nchars,
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"Should skip " + nchars + ", but skipped " +actual+" chars");
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}
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}
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public static Reader[] readers() throws IOException {
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return new Reader[] {
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new LineNumberReader(new FileReader(file)),
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new CharArrayReader(new char[] {27}),
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new PushbackReader(new FileReader(file)),
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new FileReader(file),
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new StringReader(new String(new byte[] {(byte)42}))
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};
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}
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@ParameterizedTest
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@MethodSource("readers")
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public void eof(Reader r) throws IOException {
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r.skip(Long.MAX_VALUE);
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assertEquals(0, r.skip(1));
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assertEquals(-1, r.read());
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}
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public static Reader[] skipIAE() throws IOException {
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return new Reader[] {
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new LineNumberReader(new FileReader(file)),
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new PushbackReader(new FileReader(file)),
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new FileReader(file)
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};
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}
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@ParameterizedTest
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@MethodSource("skipIAE")
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public void testThrowsIAE(Reader r) throws IOException {
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assertThrows(IllegalArgumentException.class, () -> r.skip(-1));
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}
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public static Reader[] skipNoIAE() throws IOException {
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return new Reader[] {
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new CharArrayReader(new char[] {27}),
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new StringReader(new String(new byte[] {(byte)42}))
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};
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}
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@ParameterizedTest
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@MethodSource("skipNoIAE")
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public void testNoIAE(Reader r) throws IOException {
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r.skip(-1);
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}
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}
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