/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.test.shell.io;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.nio.charset.MalformedInputException;
import java.nio.charset.UnmappableCharacterException;
import org.jnode.util.ReaderInputStream;
import org.junit.Assert;
import org.junit.Test;
public class ReaderInputStreamTest {
@Test
public void testEmpty() throws Exception {
Reader r = new StringReader("");
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
BufferedReader bisr = new BufferedReader(new InputStreamReader(ris));
String line = bisr.readLine();
Assert.assertNull(line);
}
@Test
public void testOneLine() throws Exception {
final String LINE = "The quick brown fox jumped over the lazy dog";
Reader r = new StringReader(LINE + "\n");
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
BufferedReader bisr = new BufferedReader(new InputStreamReader(ris));
String line = bisr.readLine();
Assert.assertEquals(LINE, line);
}
@Test
public void testByteAtATime() throws Exception {
final String LINE = "The quick brown fox jumped over the lazy dog\n";
final byte[] BYTES = LINE.getBytes();
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
for (int i = 0; i < BYTES.length; i++) {
Assert.assertEquals(BYTES[i], ris.read());
}
Assert.assertEquals(-1, ris.read());
}
@Test
public void testBigBuffer() throws Exception {
final String LINE = "The quick brown fox jumped over the lazy dog\n";
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
byte[] buffer = new byte[100];
Assert.assertEquals(LINE.length(), ris.read(buffer));
}
@Test
public void testTwoBytesAtATime() throws Exception {
final String LINE = "The quick brown fox jumped over the lazy dog";
final byte[] BYTES = LINE.getBytes();
final byte[] buffer = new byte[2];
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
for (int i = 0; i < BYTES.length; i += 2) {
Assert.assertEquals(2, ris.read(buffer));
Assert.assertEquals(BYTES[i], buffer[0]);
Assert.assertEquals(BYTES[i + 1], buffer[1]);
}
Assert.assertEquals(-1, ris.read(buffer));
}
@Test
public void testEmpty2() throws Exception {
Reader r = new StringReader("");
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
Assert.assertEquals(-1, ris.read());
}
@Test
public void testLatin1Simple() throws Exception {
final String LINE = "The quick brown fox jumped over the lazy dog";
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "latin1");
byte[] buffer = new byte[100];
Assert.assertEquals(LINE.length(), ris.read(buffer));
for (int i = 0; i < LINE.length(); i++) {
Assert.assertEquals((byte) LINE.charAt(i), buffer[i]);
}
}
@Test
public void testLatin1All() throws Exception {
byte[] bytes = new byte[256];
for (int i = 0; i < 256; i++) {
bytes[i] = (byte) i;
}
final String LINE = new String(bytes, "latin1");
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "latin1");
byte[] buffer = new byte[256];
Assert.assertEquals(LINE.length(), ris.read(buffer));
for (int i = 0; i < LINE.length(); i++) {
Assert.assertEquals((byte) i, buffer[i]);
}
}
@Test
public void testBadLatin1All() throws Exception {
char[] chars = new char[257];
for (int i = 0; i < 257; i++) {
chars[i] = (char) i;
}
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "latin1");
byte[] buffer = new byte[257];
Assert.assertEquals(256, ris.read(buffer));
try {
ris.read(buffer);
Assert.fail("No exception raised");
} catch (UnmappableCharacterException ex) {
// expected
}
}
@Test
public void testBadLatin1Recovery() throws Exception {
char[] chars = new char[11];
for (int i = 0; i < 11; i++) {
chars[i] = i == 5 ? '\u0101' : (char) ('A' + i);
}
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "latin1");
byte[] buffer = new byte[5];
Assert.assertEquals(5, ris.read(buffer));
try {
ris.read();
Assert.fail("No exception raised");
} catch (UnmappableCharacterException ex) {
// expected
}
Assert.assertEquals(5, ris.read(buffer));
}
@Test
public void testUnicode() throws Exception {
char[] chars = new char[1024];
for (int i = 0; i < 1024; i++) {
chars[i] = (char) i;
}
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
char[] buffer = new char[1024];
isr.read(buffer);
for (int i = 0; i < 1024; i++) {
Assert.assertEquals(chars[i], buffer[i]);
}
}
@Test
public void testUnicode2() throws Exception {
char[] chars = new char[] {'\ud800', '\udc00'};
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
Assert.assertEquals(chars[0], isr.read());
Assert.assertEquals(chars[1], isr.read());
}
@Test
public void testBadUnicode() throws Exception {
char[] chars = new char[] {'\ud800'};
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
try {
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
}
@Test
public void testBadUnicode2() throws Exception {
char[] chars = new char[] {'a', '\ud800'};
final String LINE = new String(chars);
try {
Reader r = new StringReader(LINE.substring(1));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
Reader r = new StringReader(LINE.substring(0, 1));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
Assert.assertEquals(chars[0], isr.read());
}
@Test
public void testBadUnicode3() throws Exception {
char[] chars = new char[] {'\udc00'};
final String LINE = new String(chars);
Reader r = new StringReader(LINE);
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
try {
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
}
@Test
public void testUnicode3() throws Exception {
char[] chars = new char[] {'\ud800', '\udc00'};
final String LINE = new String(chars);
Reader r = new OneCharAtATimeReader(new StringReader(LINE));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
Assert.assertEquals(chars[0], isr.read());
Assert.assertEquals(chars[1], isr.read());
}
@Test
public void testBadUnicode4() throws Exception {
char[] chars = new char[] {'\ud800'};
final String LINE = new String(chars);
Reader r = new OneCharAtATimeReader(new StringReader(LINE));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
try {
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
}
@Test
public void testBadUnicode5() throws Exception {
char[] chars = new char[] {'a', '\ud800'};
final String LINE = new String(chars);
Reader r = new OneCharAtATimeReader(new StringReader(LINE));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
Assert.assertEquals(chars[0], isr.read());
try {
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
}
@Test
public void testBadUnicode6() throws Exception {
char[] chars = new char[] {'\udc00'};
final String LINE = new String(chars);
Reader r = new OneCharAtATimeReader(new StringReader(LINE));
ReaderInputStream ris = new ReaderInputStream(r, "UTF-8");
InputStreamReader isr = new InputStreamReader(ris);
try {
isr.read();
Assert.fail("No exception raised");
} catch (MalformedInputException ex) {
// expected
}
}
/**
* This wrapper class delivers characters from a Reader one at a time, no
* matter what the client asks for.
*/
private class OneCharAtATimeReader extends Reader {
private Reader reader;
public OneCharAtATimeReader(Reader reader) {
this.reader = reader;
}
@Override
public void close() throws IOException {
this.reader.close();
}
@Override
public int read(char[] cbuf, int off, int len) throws IOException {
if (off < 0 || off > cbuf.length || len < 0 || off + len > cbuf.length || off + len < 0) {
throw new IndexOutOfBoundsException();
}
if (len == 0) {
return 0;
}
int ch = reader.read();
if (ch == -1) {
return -1;
} else {
cbuf[off] = (char) ch;
return 1;
}
}
}
}