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/*
* Copyright (C) 2010 The Guava Authors
*
* 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.
*/
package com.google.common.io;
import com.google.common.base.Charsets;
import com.google.common.primitives.Bytes;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.IOException;
import junit.framework.TestCase;
/**
* Test class for {@link LittleEndianDataOutputStream}.
*
* @author Keith Bottner
*/
public class LittleEndianDataOutputStreamTest extends TestCase {
private ByteArrayOutputStream baos = new ByteArrayOutputStream();
private LittleEndianDataOutputStream out = new LittleEndianDataOutputStream(baos);
public void testWriteLittleEndian() throws IOException {
/* Write out various test values in LITTLE ENDIAN FORMAT */
out.write(new byte[] {-100, 100});
out.writeBoolean(true);
out.writeBoolean(false);
out.writeByte(100);
out.writeByte(-100);
out.writeByte((byte) 200);
out.writeChar('a');
out.writeShort((short) -30000);
out.writeShort((short) 50000);
out.writeInt(0xCAFEBABE);
out.writeLong(0xDEADBEEFCAFEBABEL);
out.writeUTF("Herby Derby");
out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));
byte[] data = baos.toByteArray();
/* Setup input streams */
DataInput in = new DataInputStream(new ByteArrayInputStream(data));
/* Read in various values NORMALLY */
byte[] b = new byte[2];
in.readFully(b);
assertEquals(-100, b[0]);
assertEquals(100, b[1]);
assertEquals(true, in.readBoolean());
assertEquals(false, in.readBoolean());
assertEquals(100, in.readByte());
assertEquals(-100, in.readByte());
assertEquals(200, in.readUnsignedByte());
assertEquals('\u6100', in.readChar());
assertEquals(-12150, in.readShort());
assertEquals(20675, in.readUnsignedShort());
assertEquals(0xBEBAFECA, in.readInt());
assertEquals(0xBEBAFECAEFBEADDEL, in.readLong());
assertEquals("Herby Derby", in.readUTF());
assertEquals(0xBEBAFECA, Float.floatToIntBits(in.readFloat()));
assertEquals(0xBEBAFECAEFBEADDEL, Double.doubleToLongBits(in.readDouble()));
}
@SuppressWarnings("deprecation") // testing a deprecated method
public void testWriteBytes() throws IOException {
/* Write out various test values in LITTLE ENDIAN FORMAT */
out.writeBytes("r\u00C9sum\u00C9");
byte[] data = baos.toByteArray();
/* Setup input streams */
DataInput in = new DataInputStream(new ByteArrayInputStream(data));
/* Read in various values NORMALLY */
byte[] b = new byte[6];
in.readFully(b);
assertEquals("r\u00C9sum\u00C9".getBytes(Charsets.ISO_8859_1), b);
}
@SuppressWarnings("deprecation") // testing a deprecated method
public void testWriteBytes_discardHighOrderBytes() throws IOException {
/* Write out various test values in LITTLE ENDIAN FORMAT */
out.writeBytes("\uAAAA\uAABB\uAACC");
byte[] data = baos.toByteArray();
/* Setup input streams */
DataInput in = new DataInputStream(new ByteArrayInputStream(data));
/* Read in various values NORMALLY */
byte[] b = new byte[3];
in.readFully(b);
byte[] expected = {(byte) 0xAA, (byte) 0xBB, (byte) 0xCC};
assertEquals(expected, b);
}
public void testWriteChars() throws IOException {
/* Write out various test values in LITTLE ENDIAN FORMAT */
out.writeChars("r\u00C9sum\u00C9");
byte[] data = baos.toByteArray();
/* Setup input streams */
DataInput in = new DataInputStream(new ByteArrayInputStream(data));
/* Read in various values NORMALLY */
byte[] actual = new byte[12];
in.readFully(actual);
assertEquals('r', actual[0]);
assertEquals(0, actual[1]);
assertEquals((byte) 0xC9, actual[2]);
assertEquals(0, actual[3]);
assertEquals('s', actual[4]);
assertEquals(0, actual[5]);
assertEquals('u', actual[6]);
assertEquals(0, actual[7]);
assertEquals('m', actual[8]);
assertEquals(0, actual[9]);
assertEquals((byte) 0xC9, actual[10]);
assertEquals(0, actual[11]);
}
private static void assertEquals(byte[] expected, byte[] actual) {
assertEquals(Bytes.asList(expected), Bytes.asList(actual));
}
}
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