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Base16OutputStreamTest.java
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Base16OutputStreamTest.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information 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 with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.codec.binary;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.junit.jupiter.api.Test;
/**
*/
public class Base16OutputStreamTest {
private static final String STRING_FIXTURE = "Hello World";
/**
* Test the Base16OutputStream implementation against empty input.
*
* @throws IOException for some failure scenarios..
*/
@Test
public void testBase16EmptyOutputStream() throws IOException {
final byte[] emptyEncoded = {};
final byte[] emptyDecoded = {};
testByteByByte(emptyEncoded, emptyDecoded);
testByChunk(emptyEncoded, emptyDecoded);
}
/**
* Test the Base16OutputStream implementation
*
* @throws IOException for some failure scenarios.
*/
@Test
public void testBase16OutputStreamByChunk() throws IOException {
// Hello World test.
byte[] encoded = StringUtils.getBytesUtf8("48656C6C6F20576F726C64");
byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
testByChunk(encoded, decoded);
// Single Byte test.
encoded = StringUtils.getBytesUtf8("41");
decoded = new byte[]{(byte) 0x41};
testByChunk(encoded, decoded);
// test random data of sizes 0 through 150
final BaseNCodec codec = new Base16(true);
for (int i = 0; i <= 150; i++) {
final byte[][] randomData = BaseNTestData.randomData(codec, i);
encoded = randomData[1];
decoded = randomData[0];
testByChunk(encoded, decoded, true);
}
}
/**
* Test the Base16OutputStream implementation
*
* @throws IOException for some failure scenarios.
*/
@Test
public void testBase16OutputStreamByteByByte() throws IOException {
// Hello World test.
byte[] encoded = StringUtils.getBytesUtf8("48656C6C6F20576F726C64");
byte[] decoded = StringUtils.getBytesUtf8(STRING_FIXTURE);
testByteByByte(encoded, decoded);
// Single Byte test.
encoded = StringUtils.getBytesUtf8("41");
decoded = new byte[]{(byte) 0x41};
testByteByByte(encoded, decoded);
// test random data of sizes 0 through 150
final BaseNCodec codec = new Base16(true);
for (int i = 0; i <= 150; i++) {
final byte[][] randomData = BaseNTestData.randomData(codec, i);
encoded = randomData[1];
decoded = randomData[0];
testByteByByte(encoded, decoded, true);
}
}
/**
* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
* <p/>
* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base16OutputStream wraps itself in encode and decode
* mode over and over again.
*
* @param encoded base16 encoded data
* @param decoded the data from above, but decoded
* @throws IOException Usually signifies a bug in the Base16 commons-codec implementation.
*/
private void testByChunk(final byte[] encoded, final byte[] decoded) throws IOException {
testByChunk(encoded, decoded, false);
}
/**
* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
* <p/>
* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base16OutputStream wraps itself in encode and decode
* mode over and over again.
*
* @param encoded base16 encoded data
* @param decoded the data from above, but decoded
* @param lowerCase if {@code true} then use a lower-case Base16 alphabet
* @throws IOException Usually signifies a bug in the Base16 commons-codec implementation.
*/
private void testByChunk(final byte[] encoded, final byte[] decoded, final boolean lowerCase) throws IOException {
// Start with encode.
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream out = new Base16OutputStream(byteOut, true, lowerCase)) {
out.write(decoded);
final byte[] output = byteOut.toByteArray();
assertArrayEquals(encoded, output, "Streaming chunked base16 encode");
}
// Now let's try to decode.
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream out = new Base16OutputStream(byteOut, false, lowerCase)) {
out.write(encoded);
final byte[] output = byteOut.toByteArray();
assertArrayEquals(decoded, output, "Streaming chunked base16 decode");
}
// wrap encoder with decoder
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream decoderOut = new Base16OutputStream(byteOut, false, lowerCase);
final OutputStream encoderOut = new Base16OutputStream(decoderOut, true, lowerCase)) {
encoderOut.write(decoded);
final byte[] output = byteOut.toByteArray();
assertArrayEquals(decoded, output, "Streaming chunked base16 wrap-wrap!");
}
}
/**
* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
* <p/>
* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base16OutputStream wraps itself in encode and decode
* mode over and over again.
*
* @param encoded base16 encoded data
* @param decoded the data from above, but decoded
* @throws IOException Usually signifies a bug in the Base16 commons-codec implementation.
*/
private void testByteByByte(final byte[] encoded, final byte[] decoded) throws IOException {
testByteByByte(encoded, decoded, false);
}
/**
* Test method does three tests on the supplied data: 1. encoded ---[DECODE]--> decoded 2. decoded ---[ENCODE]-->
* encoded 3. decoded ---[WRAP-WRAP-WRAP-etc...] --> decoded
* <p/>
* By "[WRAP-WRAP-WRAP-etc...]" we mean situation where the Base16OutputStream wraps itself in encode and decode
* mode over and over again.
*
* @param encoded base16 encoded data
* @param decoded the data from above, but decoded
* @throws IOException Usually signifies a bug in the Base16 commons-codec implementation.
*/
private void testByteByByte(final byte[] encoded, final byte[] decoded, final boolean lowerCase) throws IOException {
// Start with encode.
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream out = new Base16OutputStream(byteOut, true, lowerCase)) {
for (final byte element : decoded) {
out.write(element);
}
final byte[] output = byteOut.toByteArray();
assertArrayEquals(encoded, output, "Streaming byte-by-byte base16 encode");
}
// Now let's try to decode.
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream out = new Base16OutputStream(byteOut, false, lowerCase)) {
for (final byte element : encoded) {
out.write(element);
}
final byte[] output = byteOut.toByteArray();
assertArrayEquals(decoded, output, "Streaming byte-by-byte base16 decode");
}
// Now let's try to decode with tonnes of flushes.
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream out = new Base16OutputStream(byteOut, false, lowerCase)) {
for (final byte element : encoded) {
out.write(element);
out.flush();
}
final byte[] output = byteOut.toByteArray();
assertArrayEquals(decoded, output, "Streaming byte-by-byte flush() base16 decode");
}
// wrap encoder with decoder
try (final ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
final OutputStream decoderOut = new Base16OutputStream(byteOut, false, lowerCase);
final OutputStream encoderOut = new Base16OutputStream(decoderOut, true, lowerCase)) {
for (final byte element : decoded) {
encoderOut.write(element);
}
final byte[] output = byteOut.toByteArray();
assertArrayEquals(decoded, output, "Streaming byte-by-byte base16 wrap-wrap!");
}
}
/**
* Tests Base16OutputStream.write for expected IndexOutOfBoundsException conditions.
*
* @throws IOException for some failure scenarios.
*/
@Test
public void testWriteOutOfBounds() throws IOException {
final byte[] buf = new byte[1024];
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
try (final Base16OutputStream out = new Base16OutputStream(bout)) {
assertThrows(IndexOutOfBoundsException.class, () -> out.write(buf, -1, 1), "Base16InputStream.write(buf, -1, 0)");
assertThrows(IndexOutOfBoundsException.class, () -> out.write(buf, 1, -1), "Base16InputStream.write(buf, 1, -1)");
assertThrows(IndexOutOfBoundsException.class, () -> out.write(buf, buf.length + 1, 0), "Base16InputStream.write(buf, buf.length + 1, 0)");
assertThrows(IndexOutOfBoundsException.class, () -> out.write(buf, buf.length - 1, 2), "Base16InputStream.write(buf, buf.length - 1, 2)");
}
}
/**
* Tests Base16OutputStream.write(null).
*
* @throws IOException for some failure scenarios.
*/
@Test
public void testWriteToNullCoverage() throws IOException {
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
try (final Base16OutputStream out = new Base16OutputStream(bout)) {
assertThrows(NullPointerException.class, () -> out.write(null, 0, 0));
}
}
}