package com.twelvemonkeys.io.enc;
import com.twelvemonkeys.io.FileUtil;
import com.twelvemonkeys.lang.ObjectAbstractTestCase;
import org.junit.Test;
import java.io.*;
import java.nio.ByteBuffer;
import static org.junit.Assert.*;
/**
* AbstractDecoderTest
* <p/>
*
* @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
* @version $Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/test/java/com/twelvemonkeys/io/enc/DecoderAbstractTestCase.java#1 $
*/
public abstract class DecoderAbstractTestCase extends ObjectAbstractTestCase {
public abstract Decoder createDecoder();
public abstract Encoder createCompatibleEncoder();
protected Object makeObject() {
return createDecoder();
}
@Test(expected = NullPointerException.class)
public final void testNullDecode() throws IOException {
Decoder decoder = createDecoder();
ByteArrayInputStream bytes = new ByteArrayInputStream(new byte[20]);
decoder.decode(bytes, null);
fail("null should throw NullPointerException");
}
@Test
public final void testEmptyDecode() throws IOException {
Decoder decoder = createDecoder();
ByteArrayInputStream bytes = new ByteArrayInputStream(new byte[0]);
try {
int count = decoder.decode(bytes, ByteBuffer.allocate(128));
assertEquals("Should not be able to read any bytes", 0, count);
}
catch (EOFException allowed) {
// Okay
}
}
private byte[] createData(int pLength) throws Exception {
byte[] bytes = new byte[pLength];
EncoderAbstractTestCase.RANDOM.nextBytes(bytes);
return bytes;
}
private void runStreamTest(int pLength) throws Exception {
byte[] data = createData(pLength);
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
OutputStream out = new EncoderStream(outBytes, createCompatibleEncoder(), true);
out.write(data);
out.close();
byte[] encoded = outBytes.toByteArray();
byte[] decoded = FileUtil.read(new DecoderStream(new ByteArrayInputStream(encoded), createDecoder()));
assertArrayEquals(String.format("Data %d", pLength), data, decoded);
InputStream in = new DecoderStream(new ByteArrayInputStream(encoded), createDecoder());
outBytes = new ByteArrayOutputStream();
FileUtil.copy(in, outBytes);
outBytes.close();
in.close();
decoded = outBytes.toByteArray();
assertArrayEquals(String.format("Data %d", pLength), data, decoded);
}
@Test
public final void testStreams() throws Exception {
if (createCompatibleEncoder() == null) {
return;
}
for (int i = 1; i < 100; i++) {
try {
runStreamTest(i);
}
catch (IOException e) {
e.printStackTrace();
fail(e.getMessage() + ": " + i);
}
}
for (int i = 100; i < 2000; i += 250) {
try {
runStreamTest(i);
}
catch (IOException e) {
e.printStackTrace();
fail(e.getMessage() + ": " + i);
}
}
for (int i = 2000; i < 80000; i += 1000) {
try {
runStreamTest(i);
}
catch (IOException e) {
e.printStackTrace();
fail(e.getMessage() + ": " + i);
}
}
}
}