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* 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.
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package org.apache.activemq.artemis.tests.unit.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.nio.ByteBuffer;
import org.apache.activemq.artemis.api.core.ActiveMQBuffer;
import org.apache.activemq.artemis.api.core.ActiveMQBuffers;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.apache.activemq.artemis.utils.DataConstants;
import org.apache.activemq.artemis.utils.RandomUtil;
import org.apache.activemq.artemis.utils.UTF8Util;
import org.junit.After;
import org.junit.Assert;
import org.junit.Test;
public class UTF8Test extends ActiveMQTestBase {
@Test
public void testValidateUTF() throws Exception {
ActiveMQBuffer buffer = ActiveMQBuffers.fixedBuffer(60 * 1024);
byte[] bytes = new byte[20000];
RandomUtil.getRandom().nextBytes(bytes);
String str = new String(bytes);
UTF8Util.saveUTF(buffer.byteBuf(), str);
String newStr = UTF8Util.readUTF(buffer);
Assert.assertEquals(str, newStr);
}
@Test
public void testValidateUTFOnDataInput() throws Exception {
for (int i = 0; i < 100; i++) {
// Random size between 15k and 20K
byte[] bytes = new byte[15000 + RandomUtil.randomPositiveInt() % 5000];
RandomUtil.getRandom().nextBytes(bytes);
String str = new String(bytes);
// The maximum size the encoded UTF string would reach is str.length * 3 (look at the UTF8 implementation)
testValidateUTFOnDataInputStream(str, ActiveMQBuffers.wrappedBuffer(ByteBuffer.allocate(str.length() * 3 + DataConstants.SIZE_SHORT)));
testValidateUTFOnDataInputStream(str, ActiveMQBuffers.dynamicBuffer(100));
testValidateUTFOnDataInputStream(str, ActiveMQBuffers.fixedBuffer(100 * 1024));
}
}
private void testValidateUTFOnDataInputStream(final String str, final ActiveMQBuffer wrap) throws Exception {
UTF8Util.saveUTF(wrap.byteBuf(), str);
DataInputStream data = new DataInputStream(new ByteArrayInputStream(wrap.toByteBuffer().array()));
String newStr = data.readUTF();
Assert.assertEquals(str, newStr);
ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
DataOutputStream outData = new DataOutputStream(byteOut);
outData.writeUTF(str);
ActiveMQBuffer buffer = ActiveMQBuffers.wrappedBuffer(byteOut.toByteArray());
newStr = UTF8Util.readUTF(buffer);
Assert.assertEquals(str, newStr);
}
@Test
public void testBigSize() throws Exception {
char[] chars = new char[0xffff + 1];
for (int i = 0; i < chars.length; i++) {
chars[i] = ' ';
}
String str = new String(chars);
ActiveMQBuffer buffer = ActiveMQBuffers.fixedBuffer(0xffff + 4);
try {
UTF8Util.saveUTF(buffer.byteBuf(), str);
Assert.fail("String is too big, supposed to throw an exception");
} catch (Exception ignored) {
}
Assert.assertEquals("A buffer was supposed to be untouched since the string was too big", 0, buffer.writerIndex());
chars = new char[25000];
for (int i = 0; i < chars.length; i++) {
chars[i] = 0x810;
}
str = new String(chars);
try {
UTF8Util.saveUTF(buffer.byteBuf(), str);
Assert.fail("Encoded String is too big, supposed to throw an exception");
} catch (Exception ignored) {
}
Assert.assertEquals("A buffer was supposed to be untouched since the string was too big", 0, buffer.writerIndex());
// Testing a string right on the limit
chars = new char[0xffff];
for (int i = 0; i < chars.length; i++) {
chars[i] = (char) (i % 100 + 1);
}
str = new String(chars);
UTF8Util.saveUTF(buffer.byteBuf(), str);
Assert.assertEquals(0xffff + DataConstants.SIZE_SHORT, buffer.writerIndex());
String newStr = UTF8Util.readUTF(buffer);
Assert.assertEquals(str, newStr);
}
@Override
@After
public void tearDown() throws Exception {
UTF8Util.clearBuffer();
super.tearDown();
}
}