test/jdk/java/io/PrintStream/InheritEncodingTest.java - master - githubmirror/panama-vector

test/jdk/java/io/PrintStream/InheritEncodingTest.java
109 строк4 KB
Brian Burkhalter
8379824: Refactor java/io tests to use JUnit
19 мар 2026, 22:44
19 мар 2026, 22:4480fb1f7
/*
 * Copyright (c) 2021, 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.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;

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

/**
 * @test
 * @bug 8276970
 * @summary Test to verify the charset in PrintStream is inherited
 *      in the OutputStreamWriter/PrintWriter
 * @run junit InheritEncodingTest
 */
public class InheritEncodingTest {

    private static final String testString = "\u00e9\u3042"; // "éあ"

    public static Charset[] encodings() {
        return new Charset[]{
                StandardCharsets.ISO_8859_1,
                StandardCharsets.US_ASCII,
                StandardCharsets.UTF_8,
                StandardCharsets.UTF_16,
                StandardCharsets.UTF_16BE,
                StandardCharsets.UTF_16LE
        };
    }

    @ParameterizedTest
    @MethodSource("encodings")
    public void testOutputStreamWriter(Charset stdCharset) throws IOException {
        var ba = new ByteArrayOutputStream();
        var ps = new PrintStream(ba, true, stdCharset);
        var expected = new String(testString.getBytes(stdCharset), stdCharset);

        // tests OutputStreamWriter's encoding explicitly
        var osw = new OutputStreamWriter(ps);
        assertEquals(stdCharset, Charset.forName(osw.getEncoding()));

        // tests roundtrip result
        osw.write(testString);
        osw.flush();
        var result = ba.toString(stdCharset);
        assertEquals(expected, result);
    }

    @ParameterizedTest
    @MethodSource("encodings")
    public void testPrintWriter(Charset stdCharset) throws IOException {
        var ba = new ByteArrayOutputStream();
        var ps = new PrintStream(ba, true, stdCharset);
        var expected = new String(testString.getBytes(stdCharset), stdCharset);

        // tests roundtrip result
        var pw = new PrintWriter(ps);
        pw.write(testString);
        pw.flush();
        var result = ba.toString(stdCharset);
        assertEquals(expected, result);
    }

    @ParameterizedTest
    @MethodSource("encodings")
    public void testPrintStream(Charset stdCharset) throws IOException {
        var ba = new ByteArrayOutputStream();
        var ps = new PrintStream(ba, true, stdCharset);
        var expected = new String(testString.getBytes(stdCharset), stdCharset);

        // tests PrintStream's charset explicitly
        var psWrapper = new PrintStream(ps);
        assertEquals(stdCharset, psWrapper.charset());

        // tests roundtrip result
        psWrapper.print(testString);
        psWrapper.flush();
        var result = ba.toString(stdCharset);
        assertEquals(expected, result);
    }
}