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Add tests for StringBlock#decodeString with failing tests for code points above 0x10FFFF (issue 2299).

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Comnir
2020-12-10 12:25:16 +02:00
parent 6d4e503b16
commit 201b5976bb
2 changed files with 59 additions and 1 deletions
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49
brut.apktool/apktool-lib/src/test/java/brut/androlib/res/decoder/StringBlockWithSurrogatePairInUtf8Test.java Normal file
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package brut.androlib.res.decoder;
import org.junit.Test;
import java.nio.charset.StandardCharsets;
import static org.junit.Assert.assertEquals;
public class StringBlockWithSurrogatePairInUtf8Test {
@Test
public void decodeSingleOctet() {
final String actual = new StringBlock("abcDEF123".getBytes(StandardCharsets.UTF_8), true).decodeString(0, 9);
assertEquals("Incorrect decoding", "abcDEF123", actual);
}
@Test
public void decodeTwoOctets() {
final String actual0 = new StringBlock(new byte[] { (byte) 0xC2, (byte) 0x80}, true).decodeString(0, 2);
assertEquals("Incorrect decoding", "\u0080", actual0);
final String actual1 = new StringBlock(new byte[] { (byte) 0xDF, (byte) 0xBF}, true).decodeString(0, 2);
assertEquals("Incorrect decoding", "\u07FF", actual1);
}
@Test
public void decodeThreeOctets() {
final String actual0 = new StringBlock(new byte[] { (byte) 0xE0, (byte) 0xA0, (byte) 0x80}, true).decodeString(0, 3);
assertEquals("Incorrect decoding", "\u0800", actual0);
final String actual1 = new StringBlock(new byte[] { (byte) 0xEF, (byte) 0xBF, (byte) 0xBF}, true).decodeString(0, 3);
assertEquals("Incorrect decoding", "\uFFFF", actual1);
}
@Test
public void decodeSurrogatePair_when_givesAsThreeOctetsFromInvalidRangeOfUtf8() {
// See: https://github.com/iBotPeaches/Apktool/issues/2299
final String actual0 = new StringBlock(new byte[] { (byte) 0xED, (byte) 0xA0, (byte) 0xBD, (byte) 0xED, (byte) 0xB4, (byte) 0x86}, true).decodeString(0, 6);
assertEquals("Incorrect decoding", "\uD83D\uDD06", actual0);
}
@Test
public void decodeSurrogatePair_when_givesAsThreeOctetsFromTheValidRangeOfUtf8() {
// \u10FFFF is encoded in UTF-8 as "0xDBFF 0xDFFF" (4-byte encoding),
// but when used in Android resources which are encoded in UTF-8, 3-byte encoding is used,
// so each of these is encoded as 3-bytes
final String actual0 = new StringBlock(new byte[] { (byte) 0xED, (byte) 0xAF, (byte) 0xBF, (byte) 0xED, (byte) 0xBF, (byte) 0xBF}, true).decodeString(0, 6);
assertEquals("Incorrect decoding", "\uDBFF\uDFFF", actual0);
}
}