EUCTWBufferBoundaryDecodeTest.java

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/*
 * @test
 * @bug 4734607 4767225 4863613
 * @summary Decode a file using EUC-TW, test for decode errors
 * @modules jdk.charsets
 * @run main EUCTWBufferBoundaryDecodeTest
 */
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

/*
 * Tests for decode errors in NIO EUC-TW decoder. 4734607 details
 * decoding errors which occur when the input file > 8k in size
 * and contains numerous US-ASCII range chars
 */
public class EUCTWBufferBoundaryDecodeTest {

    public static void main(String[] args) throws Exception {
        final String inputFileName
                = System.getProperty("os.name").startsWith("Windows")
                ? "tradChinese.win.po"
                : "tradChinese.po";

        ByteArrayOutputStream bos = new ByteArrayOutputStream(1024 * 120);

        File inputFile = new File(System.getProperty("test.src"), inputFileName);
        FileInputStream fis = new FileInputStream(inputFile);

        // Decode the EUC_TW source file, re-encode it -- (roundtrip)
        // input and output files ought to be byte for byte identical
        BufferedReader bin
                = new BufferedReader(new InputStreamReader(fis, "EUC_TW"));
        BufferedWriter bout
                = new BufferedWriter(new OutputStreamWriter(bos, "EUC-TW"));

        String line = bin.readLine();

        while (line != null) {
            bout.write(line);
            bout.newLine();
            line = bin.readLine();
        }

        bout.close();
        bin.close();

        // Compare the output with the expected output byte by byte
        byte[] outputBytes = bos.toByteArray();
        int i = 0;
        FileInputStream fi = new FileInputStream(inputFile);

        while (i < outputBytes.length) {
            byte b = (byte) fi.read();
            if (b != outputBytes[i++]) {
                throw new Exception("bug 4734607: test failed");
            }
        }
        fi.close();
    }
}