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/*
* Copyright 1999-2005 The Apache Software Foundation.
*
* Licensed 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.
*/
/* $Id$ */
package org.apache.fop.util;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.fop.pdf.PDFText;
import junit.framework.TestCase;
/**
* Test case for ASCII85InputStream.
* <p>
* ATTENTION: Some of the tests here depend on the correct behaviour of
* ASCII85OutputStream. If something fails here make sure
* ASCII85OutputStreamTestCase runs!
*/
public class ASCII85InputStreamTestCase extends TestCase {
private static final boolean DEBUG = false;
/**
* @see junit.framework.TestCase#TestCase(String)
*/
public ASCII85InputStreamTestCase(String name) {
super(name);
}
private byte[] decode(String text) throws Exception {
byte[] ascii85 = text.getBytes("US-ASCII");
InputStream in = new ByteArrayInputStream(ascii85);
InputStream decoder = new ASCII85InputStream(in);
return IOUtils.toByteArray(decoder);
}
private byte[] getChunk(int count) {
byte[] buf = new byte[count];
System.arraycopy(ASCII85OutputStreamTestCase.DATA, 0, buf, 0, buf.length);
return buf;
}
private String encode(byte[] data, int len) throws Exception {
ByteArrayOutputStream baout = new ByteArrayOutputStream();
java.io.OutputStream out = new ASCII85OutputStream(baout);
out.write(data, 0, len);
out.close();
return new String(baout.toByteArray(), "US-ASCII");
}
private void innerTestDecode(byte[] data) throws Exception {
String encoded = encode(data, data.length);
if (DEBUG) {
if (data[0] == 0) {
System.out.println("self-encode: " + data.length + " chunk 000102030405...");
} else {
System.out.println("self-encode: " + new String(data, "US-ASCII")
+ " " + PDFText.toHex(data));
}
System.out.println(" ---> " + encoded);
}
byte[] decoded = decode(encoded);
if (DEBUG) {
if (data[0] == 0) {
System.out.println("decoded: " + data.length + " chunk 000102030405...");
} else {
System.out.println("decoded: " + new String(decoded, "US-ASCII")
+ " " + PDFText.toHex(decoded));
}
}
assertEquals(PDFText.toHex(data), PDFText.toHex(decoded));
}
/**
* Tests the output of ASCII85.
* @throws Exception if an error occurs
*/
public void testDecode() throws Exception {
byte[] buf;
innerTestDecode("1. Bodypart".getBytes("US-ASCII"));
if (DEBUG) {
System.out.println("===========================================");
}
innerTestDecode(getChunk(1));
innerTestDecode(getChunk(2));
innerTestDecode(getChunk(3));
innerTestDecode(getChunk(4));
innerTestDecode(getChunk(5));
if (DEBUG) {
System.out.println("===========================================");
}
innerTestDecode(getChunk(10));
innerTestDecode(getChunk(62));
innerTestDecode(getChunk(63));
innerTestDecode(getChunk(64));
innerTestDecode(getChunk(65));
if (DEBUG) {
System.out.println("===========================================");
}
String sz;
sz = PDFText.toHex(decode("zz~>"));
assertEquals(PDFText.toHex(new byte[] {0, 0, 0, 0, 0, 0, 0, 0}), sz);
sz = PDFText.toHex(decode("z\t \0z\n~>"));
assertEquals(PDFText.toHex(new byte[] {0, 0, 0, 0, 0, 0, 0, 0}), sz);
if (DEBUG) {
System.out.println("===========================================");
}
try {
decode("vz~>");
fail("Illegal character should be detected");
} catch (IOException ioe) {
//expected
}
/* DISABLED because of try/catch in InputStream.read(byte[], int, int).
* Only the exception happening on the first byte in a block is being
* reported. BUG in JDK???
*
try {
decode("zv~>");
fail("Illegal character should be detected");
} catch (IOException ioe) {
//expected
}*/
}
private byte[] getFullASCIIRange() {
java.io.ByteArrayOutputStream baout = new java.io.ByteArrayOutputStream(256);
for (int i = 254; i < 256; i++) {
baout.write(i);
}
return baout.toByteArray();
}
/**
* Tests the full 8-bit ASCII range.
* @throws Exception if an error occurs
*/
public void testFullASCIIRange() throws Exception {
innerTestDecode(getFullASCIIRange());
}
}
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