/*
* 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.james.mime4j.decoder;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.Arrays;
import org.apache.commons.io.IOUtils;
import org.apache.james.mime4j.decoder.CodecUtil;
import org.apache.james.mime4j.decoder.QuotedPrintableInputStream;
import junit.framework.TestCase;
public class QuotedPrintableTextEncodeTest extends TestCase {
private static final Charset US_ASCII = Charset.forName("US-ASCII");
protected void setUp() throws Exception {
super.setUp();
}
protected void tearDown() throws Exception {
super.tearDown();
}
public void testEscapedSoftBreak() throws Exception {
byte[] content = new byte[500];
Arrays.fill(content, (byte)0x18);
byte[] expected = new byte[1557];
int index = 0;
for (int l=0;l<20;l++) {
for (int i=0;i<25;i++) {
expected[index++] = '=';
expected[index++] = '1';
expected[index++] = '8';
}
if (l<19) {
expected[index++] = '=';
expected[index++] = '\r';
expected[index++] = '\n';
}
}
check(content, expected);
}
public void testPlainAsciiSoftBreak() throws Exception {
byte[] content = new byte[500];
Arrays.fill(content, (byte)0x29);
byte[] expected = new byte[518];
Arrays.fill(expected, (byte)0x29);
expected[75] = '=';
expected[76] = '\r';
expected[77] = '\n';
expected[153] = '=';
expected[154] = '\r';
expected[155] = '\n';
expected[231] = '=';
expected[232] = '\r';
expected[233] = '\n';
expected[309] = '=';
expected[310] = '\r';
expected[311] = '\n';
expected[387] = '=';
expected[388] = '\r';
expected[389] = '\n';
expected[465] = '=';
expected[466] = '\r';
expected[467] = '\n';
check(content, expected);
}
public void testPlainASCII() throws Exception {
checkRoundtrip("Thisisaverysimplemessage.Thisisaverysimplemessage.Thisisaverysimplemessage." +
"Thisisaverysimplemessage.Thisisaverysimplemessage.Thisisaverysimplemessage." +
"Thisisaverysimplemessage.Thisisaverysimplemessage.Thisisaverysimplemessage." +
"Thisisaverysimplemessage.Thisisaverysimplemessage.Thisisaverysimplemessage.");
}
public void testEncodeSpace() throws Exception {
checkRoundtrip(" A");
}
public void testLetterEncoding() throws Exception {
for (byte b=0;b<Byte.MAX_VALUE;b++) {
byte[] content = {b};
// White space is only escaped when followed by CRLF
if (b != 32 && b != 9) {
checkRoundtrip(content);
}
}
}
public void testCRLFShouldResetLineCount() throws Exception {
StringBuffer buffer = new StringBuffer(4096);
for (int i=0;i<1000;i++) {
buffer.append("Hugo\r\n");
}
String longLine = buffer.toString();
check(longLine, longLine);
}
public void testDontEscapeLF() throws Exception {
check("Ready\nFor\n", "Ready\nFor\n");
}
public void testDontEscapeCR() throws Exception {
check("Ready\rFor\r", "Ready\rFor\r");
}
public void testEscapeSpaceAtLineEnd() throws Exception {
check(" \r\n", " =20\r\n");
}
public void testDontEscapeSpaceBeforeLineEnd() throws Exception {
check(" ", " ");
}
public void testDontEscapeTabsBeforeLineEnd() throws Exception {
check("\t\t\t\t", "\t\t\t\t");
}
public void testDontWhiteSpaceBeforeLineEnd() throws Exception {
check(" \t\t \t", " \t\t \t");
}
private void checkRoundtrip(String content) throws Exception {
checkRoundtrip(content, US_ASCII);
}
private void checkRoundtrip(String content, Charset charset) throws Exception {
checkRoundtrip(charset.encode(content).array());
}
private void checkRoundtrip(byte[] content) throws Exception {
InputStream in = new ByteArrayInputStream(content);
ByteArrayOutputStream out = new ByteArrayOutputStream();
CodecUtil.encodeQuotedPrintable(in, out);
// read back through decoder
in = new QuotedPrintableInputStream(new ByteArrayInputStream(out.toByteArray()));
out = new ByteArrayOutputStream();
IOUtils.copy(in, out);
assertEquals(content, out.toByteArray());
}
private void check(String content, String expected) throws Exception {
check(US_ASCII.encode(content).array(), US_ASCII.encode(expected).array());
}
private void check(byte[] content, byte[] expected) throws Exception {
ByteArrayInputStream in = new ByteArrayInputStream(content);
ByteArrayOutputStream out = new ByteArrayOutputStream();
CodecUtil.encodeQuotedPrintable(in, out);
assertEquals(expected, out.toByteArray());
}
private void assertEquals(byte[] expected, byte[] actual) {
assertEquals(expected.length, actual.length);
for (int i = 0; i < actual.length; i++) {
assertEquals("Mismatch@" + i, expected[i], actual[i]);
}
}
}