test/jdk/java/util/ResourceBundle/UTF8Properties/IllegalSequenceTest.java

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/*
 * @test
 * @bug 8027607
 * @summary Test whether illegal UTF-8 sequences are handled correctly.
 * @run main/othervm -Djava.util.PropertyResourceBundle.encoding=UTF-8 IllegalSequenceTest
 */

import java.io.*;
import java.nio.charset.*;
import java.util.*;

public class IllegalSequenceTest {
    static final byte[][] illegalSequences = {
        {(byte)0xc0, (byte)0xaf}, // non-shortest UTF-8
        {(byte)0xc2, (byte)0xe0}, // consecutive leading bytes
        {(byte)0xc2, (byte)0x80, (byte)0x80}, // two byte leading + 2 trailing
        {(byte)0xe0, (byte)0x80}, // three byte leading + 1 trailing
        {(byte)0xf4, (byte)0x90, (byte)0x80, (byte)0x80}, // 0x110000 (over U+10FFFF)
    };

    public static void main(String[] args) throws IOException {
        for (byte[] illegalSec: illegalSequences) {
            try (InputStream is = new ByteArrayInputStream(illegalSec)) {
                ResourceBundle rb = new PropertyResourceBundle(is);
                rb.getString("key");
            } catch (MalformedInputException |
                    UnmappableCharacterException e) {
                // success
                continue;
            }
            throw new RuntimeException("Excepted exception was not thrown.");
        }
    }
}