Quelle MarkSplitCRLF.java Sprache: JAVA

/*
* Copyright (c) 2019, 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 8218280
* @summary Make sure marking a line feed within a CRLF sequence works correctly
* @run testng MarkSplitCRLF
*/

import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Reader;
import java.io.StringReader;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

public class MarkSplitCRLF {
    @Test
    public static void testSpecifiedBufferSize() throws IOException {
        final String string = "foo\r\nbar";
        try (Reader reader =
            new LineNumberReader(new StringReader(string), 5)) {
            reader.read();  // 'f'
            reader.read();  // 'o'
            reader.read();  // 'o'
            reader.read();  // '\r' -> '\n'
            reader.mark(1); // mark position of '\n'
            reader.read();  // 'b'
            reader.reset(); // reset to '\n' position
            assertEquals(reader.read(), 'b');
            assertEquals(reader.read(), 'a');
            assertEquals(reader.read(), 'r');
        }
    }

    @Test
    public static void testCRNotFollowedByLF() throws IOException {
        final String string = "foo\rbar";
        try (Reader reader =
            new LineNumberReader(new StringReader(string), 5)) {
            reader.read();  // 'f'
            reader.read();  // 'o'
            reader.read();  // 'o'
            reader.read();  // '\r'
            reader.mark(1); // mark position of next character
            reader.read();  // 'b'
            reader.reset(); // reset to position after '\r'
            assertEquals(reader.read(), 'b');
            assertEquals(reader.read(), 'a');
            assertEquals(reader.read(), 'r');
        }
    }

    @Test
    public static void testDefaultBufferSize() throws IOException {
        StringBuilder sb = new StringBuilder(8195);
        for (int i = 0; i < 8190; i++) {
            char c = (char)i;
            sb.append(c);
        }
        sb.append('\r');
        sb.append('\n');
        sb.append('X');
        sb.append('Y');
        sb.append('Z');
        final String string = sb.toString();
        try (Reader reader = new LineNumberReader(new StringReader(string))) {
            for (int i = 0; i < 8191; i++) reader.read();
            reader.mark(1);
            reader.read();
            reader.reset();
            assertEquals(reader.read(), 'X');
            assertEquals(reader.read(), 'Y');
            assertEquals(reader.read(), 'Z');
        }
    }
}

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