/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.io.input;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.io.Reader;
import org.junit.Test;
/**
* Test case for {@link CharSequenceReader}.
*
* @version $Id$
*/
public class CharSequenceReaderTest {
private static final char NONE = (new char[1])[0];
/** Test {@link Reader#close()}. */
@Test
public void testClose() throws IOException {
final Reader reader = new CharSequenceReader("FooBar");
checkRead(reader, "Foo");
reader.close();
checkRead(reader, "Foo");
}
/** Test {@link Reader#markSupported()}. */
@Test
public void testMarkSupported() throws Exception {
final Reader reader = new CharSequenceReader("FooBar");
assertTrue(reader.markSupported());
reader.close();
}
/** Test {@link Reader#mark(int)}. */
@Test
public void testMark() throws IOException {
final Reader reader = new CharSequenceReader("FooBar");
checkRead(reader, "Foo");
reader.mark(0);
checkRead(reader, "Bar");
reader.reset();
checkRead(reader, "Bar");
reader.close();
checkRead(reader, "Foo");
reader.reset();
checkRead(reader, "Foo");
}
/** Test {@link Reader#skip(long)}. */
@Test
public void testSkip() throws IOException {
final Reader reader = new CharSequenceReader("FooBar");
assertEquals(3, reader.skip(3));
checkRead(reader, "Bar");
assertEquals(-1, reader.skip(3));
reader.reset();
assertEquals(2, reader.skip(2));
assertEquals(4, reader.skip(10));
assertEquals(-1, reader.skip(1));
reader.close();
assertEquals(6, reader.skip(20));
assertEquals(-1, reader.read());
}
/** Test {@link Reader#read()}. */
@Test
public void testRead() throws IOException {
final Reader reader = new CharSequenceReader("Foo");
assertEquals('F', reader.read());
assertEquals('o', reader.read());
assertEquals('o', reader.read());
assertEquals(-1, reader.read());
assertEquals(-1, reader.read());
reader.close();
}
/** Test {@link Reader#read(char[])}. */
@Test
public void testReadCharArray() throws IOException {
final Reader reader = new CharSequenceReader("FooBar");
char[] chars = new char[2];
assertEquals(2, reader.read(chars));
checkArray(new char[] {'F', 'o'}, chars);
chars = new char[3];
assertEquals(3, reader.read(chars));
checkArray(new char[] {'o', 'B', 'a'}, chars);
chars = new char[3];
assertEquals(1, reader.read(chars));
checkArray(new char[] {'r', NONE, NONE}, chars);
assertEquals(-1, reader.read(chars));
reader.close();
}
/** Test {@link Reader#read(char[], int, int)}. */
@Test
public void testReadCharArrayPortion() throws IOException {
final char[] chars = new char[10];
final Reader reader = new CharSequenceReader("FooBar");
assertEquals(3, reader.read(chars, 3, 3));
checkArray(new char[] {NONE, NONE, NONE, 'F', 'o', 'o'}, chars);
assertEquals(3, reader.read(chars, 0, 3));
checkArray(new char[] {'B', 'a', 'r', 'F', 'o', 'o', NONE}, chars);
assertEquals(-1, reader.read(chars));
reader.close();
}
private void checkRead(final Reader reader, final String expected) throws IOException {
for (int i = 0; i < expected.length(); i++) {
assertEquals("Read[" + i + "] of '" + expected + "'",
expected.charAt(i), (char)reader.read());
}
}
private void checkArray(final char[] expected, final char[] actual) {
for (int i = 0; i < expected.length; i++) {
assertEquals("Compare[" +i + "]", expected[i], actual[i]);
}
}
}