| /* 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.harmony.tests.java.io; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.nio.CharBuffer; |
| |
| import junit.framework.TestCase; |
| |
| public class ReaderTest extends TestCase { |
| |
| public void test_Reader_CharBuffer_null() throws IOException { |
| String s = "MY TEST STRING"; |
| MockReader mockReader = new MockReader(s.toCharArray()); |
| CharBuffer charBuffer = null; |
| try { |
| mockReader.read(charBuffer); |
| fail("Should throw NullPointerException"); |
| } catch (NullPointerException e) { |
| //expected; |
| } |
| } |
| |
| public void test_Reader_CharBuffer_ZeroChar() throws IOException { |
| //the charBuffer has the capacity of 0, then there the number of char read |
| // to the CharBuffer is 0. Furthermore, the MockReader is intact in its content. |
| String s = "MY TEST STRING"; |
| char[] srcBuffer = s.toCharArray(); |
| MockReader mockReader = new MockReader(srcBuffer); |
| CharBuffer charBuffer = CharBuffer.allocate(0); |
| int result = mockReader.read(charBuffer); |
| assertEquals(0, result); |
| char[] destBuffer = new char[srcBuffer.length]; |
| mockReader.read(destBuffer); |
| assertEquals(s, String.valueOf(destBuffer)); |
| } |
| |
| public void test_Reader_CharBufferChar() throws IOException { |
| String s = "MY TEST STRING"; |
| char[] srcBuffer = s.toCharArray(); |
| final int CHARBUFFER_SIZE = 10; |
| MockReader mockReader = new MockReader(srcBuffer); |
| CharBuffer charBuffer = CharBuffer.allocate(CHARBUFFER_SIZE); |
| charBuffer.append('A'); |
| final int CHARBUFFER_REMAINING = charBuffer.remaining(); |
| int result = mockReader.read(charBuffer); |
| assertEquals(CHARBUFFER_REMAINING, result); |
| charBuffer.rewind(); |
| assertEquals(s.substring(0, CHARBUFFER_REMAINING), charBuffer |
| .subSequence(CHARBUFFER_SIZE - CHARBUFFER_REMAINING, |
| CHARBUFFER_SIZE).toString()); |
| char[] destBuffer = new char[srcBuffer.length - CHARBUFFER_REMAINING]; |
| mockReader.read(destBuffer); |
| assertEquals(s.substring(CHARBUFFER_REMAINING), String |
| .valueOf(destBuffer)); |
| } |
| |
| /** |
| * {@link java.io.Reader#mark(int)} |
| */ |
| public void test_mark() { |
| MockReader mockReader = new MockReader(); |
| try { |
| mockReader.mark(0); |
| fail("Should throw IOException for Reader do not support mark"); |
| } catch (IOException e) { |
| // Excepted |
| } |
| } |
| |
| /** |
| * {@link java.io.Reader#read()} |
| */ |
| public void test_read() throws IOException { |
| MockReader reader = new MockReader(); |
| |
| // return -1 when the stream is null; |
| assertEquals("Should be equal to -1", -1, reader.read()); |
| |
| String string = "MY TEST STRING"; |
| char[] srcBuffer = string.toCharArray(); |
| MockReader mockReader = new MockReader(srcBuffer); |
| |
| // normal read |
| for (char c : srcBuffer) { |
| assertEquals("Should be equal to \'" + c + "\'", c, mockReader |
| .read()); |
| } |
| |
| // return -1 when read Out of Index |
| mockReader.read(); |
| assertEquals("Should be equal to -1", -1, reader.read()); |
| |
| } |
| |
| /** |
| * {@link java.io.Reader#ready()} |
| */ |
| public void test_ready() throws IOException { |
| MockReader mockReader = new MockReader(); |
| assertFalse("Should always return false", mockReader.ready()); |
| |
| } |
| |
| /** |
| * {@link java.io.Reader#reset()} |
| */ |
| public void test_reset() { |
| MockReader mockReader = new MockReader(); |
| try { |
| mockReader.reset(); |
| fail("Should throw IOException"); |
| } catch (IOException e) { |
| // Excepted |
| } |
| } |
| |
| /** |
| * {@link java.io.Reader#skip(long)} |
| */ |
| public void test_skip() throws IOException { |
| String string = "MY TEST STRING"; |
| char[] srcBuffer = string.toCharArray(); |
| int length = srcBuffer.length; |
| MockReader mockReader = new MockReader(srcBuffer); |
| assertEquals("Should be equal to \'M\'", 'M', mockReader.read()); |
| |
| // normal skip |
| mockReader.skip(length / 2); |
| assertEquals("Should be equal to \'S\'", 'S', mockReader.read()); |
| |
| // try to skip a bigger number of characters than the total |
| // Should do nothing |
| mockReader.skip(length); |
| |
| // try to skip a negative number of characters throw IllegalArgumentException |
| try { |
| mockReader.skip(-1); |
| fail("Should throw IllegalArgumentException"); |
| } catch (IllegalArgumentException e) { |
| // Excepted |
| } |
| } |
| |
| class MockReader extends Reader { |
| |
| private char[] contents; |
| |
| private int current_offset = 0; |
| |
| private int length = 0; |
| |
| public MockReader() { |
| super(); |
| } |
| |
| public MockReader(char[] data) { |
| contents = data; |
| length = contents.length; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| |
| contents = null; |
| } |
| |
| @Override |
| public int read(char[] buf, int offset, int count) throws IOException { |
| |
| if (null == contents) { |
| return -1; |
| } |
| if (length <= current_offset) { |
| return -1; |
| } |
| if (buf.length < offset + count) { |
| throw new IndexOutOfBoundsException(); |
| } |
| |
| count = Math.min(count, length - current_offset); |
| for (int i = 0; i < count; i++) { |
| buf[offset + i] = contents[current_offset + i]; |
| } |
| current_offset += count; |
| return count; |
| } |
| |
| } |
| } |