kerby-common/kerby-asn1/src/test/java/org/apache/kerby/asn1/Asn1Utf8StringTest.java

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 *  or more contributor license agreements.  See the NOTICE file
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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
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package org.apache.kerby.asn1;

import java.nio.charset.StandardCharsets;

import org.apache.kerby.asn1.type.Asn1Utf8String;
import org.junit.Test;

import static org.assertj.core.api.Assertions.assertThat;

public class Asn1Utf8StringTest {

    @Test
    public void testEncodingLength() throws Exception {

        // Testing length <= 127
        String input = "E-Tuğra EBG Bilişim Teknolojileri ve Hizmetleri A.Ş.";
        byte[] inputUtf8Bytes = input.getBytes(StandardCharsets.UTF_8);
        byte[] encoded = new byte[2 + inputUtf8Bytes.length];
        encoded[0] = 0x0c;
        encoded[1] = (byte) inputUtf8Bytes.length;
        System.arraycopy(inputUtf8Bytes, 0, encoded, 2, inputUtf8Bytes.length);

        Asn1Utf8String utf8String = (Asn1Utf8String) Asn1.decode(encoded);
        assertThat(utf8String.encodingLength()).isEqualTo(encoded.length);
        assertThat(utf8String.encode()).isEqualTo(encoded);

        // Testing length >= 128
        input = "Википедия расположена на серверах Фонда Викимедиа "
                + "— некоммерческой организации, также обеспечивающей работу ряда других проектов";
        inputUtf8Bytes = input.getBytes(StandardCharsets.UTF_8);
        encoded = new byte[3 + inputUtf8Bytes.length];
        encoded[0] = 0x0c;
        encoded[1] = (byte) ((1 << 7) | 1);
        encoded[2] = (byte) inputUtf8Bytes.length;
        System.arraycopy(inputUtf8Bytes, 0, encoded, 3, inputUtf8Bytes.length);

        utf8String = (Asn1Utf8String) Asn1.decode(encoded);
        assertThat(utf8String.encodingLength()).isEqualTo(encoded.length);
        assertThat(utf8String.encode()).isEqualTo(encoded);
    }

}