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/*
* Copyright (C) 2021 Thomas Wolf <thomas.wolf@paranor.ch> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.util;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import java.nio.charset.StandardCharsets;
import org.junit.Test;
/**
* Tests for {@link Base85}.
*/
public class Base85Test {
private static final String VALID_CHARS = "0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+ "!#$%&()*+-;<=>?@^_`{|}~";
@Test
public void testChars() {
for (int i = 0; i < 256; i++) {
byte[] testData = { '1', '2', '3', '4', (byte) i };
if (VALID_CHARS.indexOf(i) >= 0) {
byte[] decoded = Base85.decode(testData, 4);
assertNotNull(decoded);
} else {
assertThrows(IllegalArgumentException.class,
() -> Base85.decode(testData, 4));
}
}
}
private void roundtrip(byte[] data, int expectedLength) {
byte[] encoded = Base85.encode(data);
assertEquals(expectedLength, encoded.length);
assertArrayEquals(data, Base85.decode(encoded, data.length));
}
private void roundtrip(String data, int expectedLength) {
roundtrip(data.getBytes(StandardCharsets.US_ASCII), expectedLength);
}
@Test
public void testPadding() {
roundtrip("", 0);
roundtrip("a", 5);
roundtrip("ab", 5);
roundtrip("abc", 5);
roundtrip("abcd", 5);
roundtrip("abcde", 10);
roundtrip("abcdef", 10);
roundtrip("abcdefg", 10);
roundtrip("abcdefgh", 10);
roundtrip("abcdefghi", 15);
}
@Test
public void testBinary() {
roundtrip(new byte[] { 1 }, 5);
roundtrip(new byte[] { 1, 2 }, 5);
roundtrip(new byte[] { 1, 2, 3 }, 5);
roundtrip(new byte[] { 1, 2, 3, 4 }, 5);
roundtrip(new byte[] { 1, 2, 3, 4, 5 }, 10);
roundtrip(new byte[] { 1, 2, 3, 4, 5, 0, 0, 0 }, 10);
roundtrip(new byte[] { 1, 2, 3, 4, 0, 0, 0, 5 }, 10);
}
@Test
public void testOverflow() {
IllegalArgumentException e = assertThrows(
IllegalArgumentException.class,
() -> Base85.decode(new byte[] { '~', '~', '~', '~', '~' }, 4));
assertTrue(e.getMessage().contains("overflow"));
}
}
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