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/*
* DSI utilities
*
* Copyright (C) 2010-2023 Sebastiano Vigna
*
* This program and the accompanying materials are made available under the
* terms of the GNU Lesser General Public License v2.1 or later,
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html,
* or the Apache Software License 2.0, which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
*
* SPDX-License-Identifier: LGPL-2.1-or-later OR Apache-2.0
*/
package it.unimi.dsi.io;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringReader;
import org.junit.Test;
import it.unimi.dsi.fastutil.io.FastBufferedOutputStream;
import it.unimi.dsi.lang.MutableString;
@SuppressWarnings("resource")
public class FastBufferedReaderTest {
@Test
public void testToSpec() {
final String className = FastBufferedReader.class.getName();
assertEquals(className, new FastBufferedReader().toSpec());
assertEquals(className + "(100)", new FastBufferedReader(100).toSpec());
assertEquals(className + "(\"_\")", new FastBufferedReader("_").toSpec());
assertEquals(className + "(100,\"_\")", new FastBufferedReader("100", "_").toSpec());
}
@Test
public void testBufferZero() throws IOException {
final String string = "test\ntest\n";
final FastBufferedReader fbr = new FastBufferedReader(1);
fbr.setReader(new StringReader(string));
assertEquals(new MutableString("test"), fbr.readLine(new MutableString()));
assertEquals('t', fbr.read());
assertEquals('e', fbr.read());
assertEquals('s', fbr.read());
assertEquals('t', fbr.read());
assertEquals('\n', fbr.read());
}
@Test
public void testRandom() throws IOException {
final File file = File.createTempFile(FastBufferedReaderTest.class.getSimpleName(), "tmp");
String s;
file.deleteOnExit();
final MutableString ms = new MutableString();
MutableString ms2;
final int l = (int)file.length();
final FastBufferedReader br = new FastBufferedReader(new FileReader(file), 2);
final BufferedReader test = new BufferedReader(new FileReader(file));
int a1, a2, off, len, pos;
final java.util.Random r = new java.util.Random(0);
// Create temp file
final FastBufferedOutputStream fos = new FastBufferedOutputStream(new FileOutputStream(file));
for(int i = 1000000; i-- !=0;) {
final int c = r.nextInt(100);
if (c <= 1) {
if (c == 0) fos.write('\r');
fos.write('\n');
}
else fos.write(r.nextInt(95) + 32);
}
fos.close();
final char b1[] = new char[32768];
final char b2[] = new char[32768];
for(int t = 1000000; t-- != 0;) {
switch(r.nextInt(4)) {
case 0:
//System.err.println("read()");
a1 = br.read();
a2 = test.read();
assertTrue("Buffered read() returned " + a1 + " instead of " + a2 , a1 == a2);
if (a1 == -1) return;
break;
case 1:
off = r.nextInt(b1.length);
len = r.nextInt(b1.length - off + 1);
a1 = br.read(b1, off, len);
a2 = test.read(b2, off, len);
//System.err.println("read(b, " + off + ", " + len + ")");
assertTrue("Buffered read(b, " + off + ", " + len + ") returned " + a1 + " instead of " + a2 , a1 == a2);
for(int i = off; i < off + len; i++) assertTrue("Buffered read(b, " + off + ", " + len + ") has a mismatch at position " + i , b1[i] == b2[i]);
break;
case 2:
pos = r.nextInt(l/2 + 1);
a1 = (int)br.skip(pos);
a2 = (int)test.skip(pos);
//System.err.println("skip(" + pos + ")");
assertTrue("skip() returned " + a1 + " instead of " + a2 , a1 == a2);
break;
case 3:
ms2 = br.readLine(ms);
s = test.readLine();
//System.err.println("readLine()");
assertTrue("readLine() returned " + ms + " instead of " + s , s == null && ms2 == null || ms.equals(s));
}
}
file.delete();
}
}
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