/****************************************************************
* 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.util;
import org.apache.james.mime4j.util.ByteArrayBuffer;
import junit.framework.TestCase;
/**
* Unit tests for {@link ByteArrayBuffer}.
*/
public class TestByteArrayBuffer extends TestCase {
public void testConstructor() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(16);
assertEquals(16, buffer.capacity());
assertEquals(0, buffer.length());
assertNotNull(buffer.buffer());
assertEquals(16, buffer.buffer().length);
try {
new ByteArrayBuffer(-1);
fail("IllegalArgumentException should have been thrown");
} catch (IllegalArgumentException ex) {
// expected
}
}
public void testSimpleAppend() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(16);
assertEquals(16, buffer.capacity());
assertEquals(0, buffer.length());
byte[] b1 = buffer.toByteArray();
assertNotNull(b1);
assertEquals(0, b1.length);
assertTrue(buffer.isEmpty());
assertFalse(buffer.isFull());
byte[] tmp = new byte[] { 1, 2, 3, 4};
buffer.append(tmp, 0, tmp.length);
assertEquals(16, buffer.capacity());
assertEquals(4, buffer.length());
assertFalse(buffer.isEmpty());
assertFalse(buffer.isFull());
byte[] b2 = buffer.toByteArray();
assertNotNull(b2);
assertEquals(4, b2.length);
for (int i = 0; i < tmp.length; i++) {
assertEquals(tmp[i], b2[i]);
assertEquals(tmp[i], buffer.byteAt(i));
}
buffer.clear();
assertEquals(16, buffer.capacity());
assertEquals(0, buffer.length());
assertTrue(buffer.isEmpty());
assertFalse(buffer.isFull());
}
public void testExpandAppend() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
assertEquals(4, buffer.capacity());
byte[] tmp = new byte[] { 1, 2, 3, 4};
buffer.append(tmp, 0, 2);
buffer.append(tmp, 0, 4);
buffer.append(tmp, 0, 0);
assertEquals(8, buffer.capacity());
assertEquals(6, buffer.length());
buffer.append(tmp, 0, 4);
assertEquals(16, buffer.capacity());
assertEquals(10, buffer.length());
}
public void testInvalidAppend() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
buffer.append((byte[])null, 0, 0);
byte[] tmp = new byte[] { 1, 2, 3, 4};
try {
buffer.append(tmp, -1, 0);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 0, -1);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 0, 8);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 10, Integer.MAX_VALUE);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 2, 4);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
}
public void testAppendOneByte() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
assertEquals(4, buffer.capacity());
byte[] tmp = new byte[] { 1, 127, -1, -128, 1, -2};
for (int i = 0; i < tmp.length; i++) {
buffer.append(tmp[i]);
}
assertEquals(8, buffer.capacity());
assertEquals(6, buffer.length());
for (int i = 0; i < tmp.length; i++) {
assertEquals(tmp[i], buffer.byteAt(i));
}
}
public void testSetLength() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
buffer.setLength(2);
assertEquals(2, buffer.length());
}
public void testSetInvalidLength() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
try {
buffer.setLength(-2);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.setLength(200);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
}
public void testAppendCharArrayAsAscii() throws Exception {
String s1 = "stuff";
String s2 = " and more stuff";
char[] b1 = s1.toCharArray();
char[] b2 = s2.toCharArray();
ByteArrayBuffer buffer = new ByteArrayBuffer(8);
buffer.append(b1, 0, b1.length);
buffer.append(b2, 0, b2.length);
assertEquals(s1 + s2, new String(buffer.toByteArray(), "US-ASCII"));
}
public void testAppendNullCharArray() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(8);
buffer.append((char[])null, 0, 0);
assertEquals(0, buffer.length());
}
public void testAppendEmptyCharArray() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(8);
buffer.append(new char[] {}, 0, 0);
assertEquals(0, buffer.length());
}
public void testInvalidAppendCharArrayAsAscii() throws Exception {
ByteArrayBuffer buffer = new ByteArrayBuffer(4);
buffer.append((char[])null, 0, 0);
char[] tmp = new char[] { '1', '2', '3', '4'};
try {
buffer.append(tmp, -1, 0);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 0, -1);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 0, 8);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 10, Integer.MAX_VALUE);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
try {
buffer.append(tmp, 2, 4);
fail("IndexOutOfBoundsException should have been thrown");
} catch (IndexOutOfBoundsException ex) {
// expected
}
}
}