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package org.apache.velocity.io;
/*
* 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.
*/
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.apache.commons.lang3.ArrayUtils;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
* Test the UnicodeInputStream.
*
* @author $author$
* @version $Revision$, $Date$
*/
public class UnicodeInputStreamTestCase
extends TestCase
{
public UnicodeInputStreamTestCase(final String name)
{
super(name);
}
public static Test suite()
{
return new TestSuite(UnicodeInputStreamTestCase.class);
}
public void testSimpleStream()
throws Exception
{
testRun(null, "Ich bin zwei Oeltanks", "US-ASCII", true);
testRun(null, "Ich bin zwei Oeltanks", "US-ASCII", false);
}
public void testSimpleUTF8()
throws Exception
{
testRun(null, "Ich bin zwei Oeltanks", "UTF-8", true);
testRun(null, "Ich bin zwei Oeltanks", "UTF-8", false);
}
public void testRealUTF8()
throws Exception
{
testRun(null, "Ich bin zwei \u00d6ltanks", "UTF-8", true);
testRun(null, "Ich bin zwei \u00d6ltanks", "UTF-8", false);
}
public void testRealUTF8WithBOM()
throws Exception
{
testRun(UnicodeInputStream.UTF8_BOM, "Ich bin ein Test",
"UTF-8", true);
testRun(UnicodeInputStream.UTF8_BOM, "Ich bin ein Test",
"UTF-8", false);
}
public void testRealUTF16BEWithBOM()
throws Exception
{
testRun(UnicodeInputStream.UTF16BE_BOM, "Ich bin ein Test",
"UTF-16BE", true);
testRun(UnicodeInputStream.UTF16BE_BOM, "Ich bin ein Test",
"UTF-16BE", false);
}
public void testRealUTF16LEWithBOM()
throws Exception
{
testRun(UnicodeInputStream.UTF16LE_BOM, "Ich bin ein Test",
"UTF-16LE", true);
testRun(UnicodeInputStream.UTF16LE_BOM, "Ich bin ein Test",
"UTF-16LE", false);
}
public void testRealUTF32BEWithBOM()
throws Exception
{
testRun(UnicodeInputStream.UTF32BE_BOM, null,
"UTF-32BE", true);
testRun(UnicodeInputStream.UTF32BE_BOM, null,
"UTF-32BE", false);
}
public void testRealUTF32LEWithBOM()
throws Exception
{
testRun(UnicodeInputStream.UTF32LE_BOM, null,
"UTF-32LE", true);
testRun(UnicodeInputStream.UTF32LE_BOM, null,
"UTF-32LE", false);
}
protected void testRun(final UnicodeInputStream.UnicodeBOM bom, final String str, final String testEncoding, final boolean skipBOM)
throws Exception
{
byte [] testString = buildTestString(bom, str, testEncoding, skipBOM);
InputStream is = null;
UnicodeInputStream uis = null;
try
{
is = createInputStream(bom, str, testEncoding);
uis = new UnicodeInputStream(is, skipBOM);
assertEquals("BOM Skipping problem", skipBOM, uis.isSkipBOM());
if (bom != null)
{
assertEquals("Wrong Encoding detected", testEncoding, uis.getEncodingFromStream());
}
byte [] result = readAllBytes(uis, testEncoding);
assertNotNull(testString);
assertNotNull(result);
assertEquals("Wrong result length", testString.length, result.length);
for (int i = 0; i < result.length; i++)
{
assertEquals("Wrong Byte at " + i, testString[i], result[i]);
}
}
finally
{
if (uis != null)
{
uis.close();
}
if (is != null)
{
is.close();
}
}
}
protected InputStream createInputStream(final UnicodeInputStream.UnicodeBOM bom, final String str, final String enc)
throws Exception
{
if (bom == null)
{
if (str != null)
{
return new ByteArrayInputStream(str.getBytes(enc));
}
else
{
return new ByteArrayInputStream(new byte[0]);
}
}
else
{
if (str != null)
{
return new ByteArrayInputStream(ArrayUtils.addAll(bom.getBytes(), str.getBytes(enc)));
}
else
{
return new ByteArrayInputStream(ArrayUtils.addAll(bom.getBytes(), new byte[0]));
}
}
}
protected byte [] buildTestString(final UnicodeInputStream.UnicodeBOM bom, final String str, final String enc, final boolean skipBOM)
throws Exception
{
byte [] strBytes = (str != null) ? str.getBytes(enc) : new byte[0];
if ((bom == null) || skipBOM)
{
return strBytes;
}
else
{
return ArrayUtils.addAll(bom.getBytes(), strBytes);
}
}
protected byte [] readAllBytes(final InputStream inputStream, final String enc)
throws Exception
{
InputStreamReader isr = null;
byte [] res = new byte[0];
try
{
byte[] buf = new byte[1024];
int read = 0;
while ((read = inputStream.read(buf)) >= 0)
{
res = ArrayUtils.addAll(res, ArrayUtils.subarray(buf, 0, read));
}
}
finally
{
if (isr != null)
{
isr.close();
}
}
return res;
}
}
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