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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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* software distributed under the License is distributed on an
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package org.apache.olingo.odata2.core.ep.util;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import org.apache.olingo.odata2.testutil.fit.BaseTest;
import org.junit.Before;
import org.junit.Test;
/**
*
*/
public class CircleStreamBufferTest extends BaseTest {
private static final boolean LOG_ON = false;
private static final Charset DEFAULT_CHARSET = Charset.forName("utf-8");
public CircleStreamBufferTest() {}
@Before
public void setUp() {}
@Test
public void testSimpleWriteReadSignBySign() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream write = csb.getOutputStream();
byte[] writeData = "Test".getBytes("UTF-8");
for (byte element : writeData) {
write.write(element);
}
InputStream inStream = csb.getInputStream();
byte[] buffer = new byte[4];
for (int i = 0; i < buffer.length; i++) {
buffer[i] = (byte) inStream.read();
}
String result = new String(buffer);
log("Test result = [" + result + "]");
assertEquals("Test", result);
}
@Test
public void testSimpleWriteReadSignBySignMoreThenBufferSize() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer(128);
OutputStream write = csb.getOutputStream();
int signs = 1024;
String testData = createTestString(signs);
byte[] writeData = testData.getBytes("UTF-8");
for (byte element : writeData) {
write.write(element);
}
InputStream inStream = csb.getInputStream();
byte[] buffer = new byte[signs];
for (int i = 0; i < buffer.length; i++) {
buffer[i] = (byte) inStream.read();
}
String result = new String(buffer);
log("Test result = [" + result + "]");
assertEquals(testData, result);
}
@Test
public void testSimpleWriteReadOnce() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream write = csb.getOutputStream();
write.write("Test".getBytes(), 0, 4);
InputStream inStream = csb.getInputStream();
byte[] buffer = new byte[4];
int count = inStream.read(buffer);
String result = new String(buffer);
log("Test result = [" + result + "]");
assertEquals(4, count);
assertEquals("Test", result);
}
@Test
public void testSimpleWriteReadTwice() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
// first writeInternal/read cycle
outStream.write("Test_1".getBytes());
String firstResult = readFrom(inStream);
log("Test result = [" + firstResult + "]");
assertEquals("Test_1", firstResult);
// second writeInternal/read cycle
outStream.write("Test_2".getBytes());
String secondResult = readFrom(inStream);
log("Test result = [" + secondResult + "]");
assertEquals("Test_2", secondResult);
}
@Test
public void testSimpleWriteReadOnce8k() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = 8192;
String testData = createTestString(signs);
outStream.write(testData.getBytes());
String result = readFrom(inStream);
log("Test result = [" + result + "]");
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteExactOnceMoreThenBufferSize() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = bufferSize + 1;
String testData = createTestString(signs);
outStream.write(testData.getBytes());
String result = readFrom(inStream, bufferSize * 2);
log("Test result = [" + result + "]");
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteReadOnceMoreThenBufferSize() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
int signs = (1 + bufferSize) * 3;
String testData = createTestString(signs);
outStream.write(testData.getBytes());
String result = readFrom(inStream);
// log("Test result = [" + result + "]");
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteMoreThenDefaultBufferSize() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = 70110;
String testData = createTestString(signs);
outStream.write(testData.getBytes(DEFAULT_CHARSET));
String result = readFrom(inStream);
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteMoreThenBufferSize() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = bufferSize * 10;
String testData = createTestString(signs);
outStream.write(testData.getBytes(DEFAULT_CHARSET));
String result = readFrom(inStream, bufferSize * 2);
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteMoreThenBufferSizeAndUmlauts() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = bufferSize * 10;
String testData = createTestString(signs);
testData = "äüöÄÜÖ" + testData + "äüöÄÜÖ";
outStream.write(testData.getBytes(DEFAULT_CHARSET));
String result = readFrom(inStream);
assertEquals(testData.length(), result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteMoreThenBufferSizeAndUmlautsIso() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = bufferSize * 10;
String testData = createTestString(signs);
testData = "äüöÄÜÖ" + testData + "äüöÄÜÖ";
outStream.write(testData.getBytes("iso-8859-1"));
String result = readFrom(inStream, "iso-8859-1");
assertEquals(testData.length(), result.length());
assertEquals(testData, result);
}
@Test
public void testSimpleWriteALotMoreThenBufferSize() throws Exception {
int bufferSize = 4096;
CircleStreamBuffer csb = new CircleStreamBuffer(bufferSize);
OutputStream outStream = csb.getOutputStream();
InputStream inStream = csb.getInputStream();
final int signs = bufferSize * 100;
String testData = createTestString(signs);
outStream.write(testData.getBytes(DEFAULT_CHARSET));
String result = readFrom(inStream, bufferSize * 2);
assertEquals(signs, result.length());
assertEquals(testData, result);
}
@Test(expected = IOException.class)
public void testCloseInputStream() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream write = csb.getOutputStream();
write.write("Test".getBytes(), 0, 4);
InputStream inStream = csb.getInputStream();
inStream.close();
byte[] buffer = new byte[4];
int count = inStream.read(buffer);
assertEquals(4, count);
}
@Test(expected = IOException.class)
public void testCloseOutputStream() throws Exception {
CircleStreamBuffer csb = new CircleStreamBuffer();
OutputStream write = csb.getOutputStream();
write.close();
write.write("Test".getBytes(), 0, 4);
}
// ###################################################
// #
// # Below here are test helper methods
// #
// ###################################################
private String readFrom(final InputStream stream) throws IOException {
return readFrom(stream, 128);
}
private String readFrom(final InputStream stream, final int bufferSize) throws IOException {
return readFrom(stream, DEFAULT_CHARSET, bufferSize);
}
private String readFrom(final InputStream stream, final String charset) throws IOException {
return readFrom(stream, Charset.forName(charset), 128);
}
private String readFrom(final InputStream stream, final Charset charset, final int bufferSize) throws IOException {
StringBuilder b = new StringBuilder();
int count;
byte[] buffer = new byte[bufferSize];
while ((count = stream.read(buffer)) >= 0) {
b.append(new String(buffer, 0, count, charset));
}
return b.toString();
}
private String createTestString(final int signs) {
StringBuilder b = new StringBuilder();
for (int i = 0; i < signs; i++) {
int sign = (int) (65 + (Math.random() * 25));
b.append((char) sign);
}
return b.toString();
}
private void log(final String toLog) {
if (LOG_ON) {
System.out.println(toLog);
}
}
}