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Commons IO example source code file (CountingOutputStreamTest.java)
The Commons IO CountingOutputStreamTest.java source code/* * 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.output; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; import junit.framework.TestCase; import org.apache.commons.io.IOUtils; import org.apache.commons.io.input.NullInputStream; /** * @version $Revision: 618694 $ $Date: 2008-02-05 16:34:21 +0000 (Tue, 05 Feb 2008) $ */ public class CountingOutputStreamTest extends TestCase { public CountingOutputStreamTest(String name) { super(name); } public void testCounting() throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream(); CountingOutputStream cos = new CountingOutputStream(baos); for(int i = 0; i < 20; i++) { cos.write(i); } assertByteArrayEquals("CountingOutputStream.write(int)", baos.toByteArray(), 0, 20); assertEquals("CountingOutputStream.getCount()", cos.getCount(), 20); byte[] array = new byte[10]; for(int i = 20; i < 30; i++) { array[i-20] = (byte)i; } cos.write(array); assertByteArrayEquals("CountingOutputStream.write(byte[])", baos.toByteArray(), 0, 30); assertEquals("CountingOutputStream.getCount()", cos.getCount(), 30); for(int i = 25; i < 35; i++) { array[i-25] = (byte)i; } cos.write(array, 5, 5); assertByteArrayEquals("CountingOutputStream.write(byte[], int, int)", baos.toByteArray(), 0, 35); assertEquals("CountingOutputStream.getCount()", cos.getCount(), 35); int count = cos.resetCount(); assertEquals("CountingOutputStream.resetCount()", count, 35); for(int i = 0; i < 10; i++) { cos.write(i); } assertByteArrayEquals("CountingOutputStream.write(int)", baos.toByteArray(), 35, 45); assertEquals("CountingOutputStream.getCount()", cos.getCount(), 10); } /** * Test for files > 2GB in size - see issue IO-84 */ public void testLargeFiles_IO84() throws Exception { long size = (long)Integer.MAX_VALUE + (long)1; NullInputStream mock = new NullInputStream(size); OutputStream nos = new NullOutputStream(); CountingOutputStream cos = new CountingOutputStream(nos); // Test integer methods IOUtils.copyLarge(mock, cos); try { cos.getCount(); fail("Expected getCount() to throw an ArithmeticException"); } catch (ArithmeticException ae) { // expected result } try { cos.resetCount(); fail("Expected resetCount() to throw an ArithmeticException"); } catch (ArithmeticException ae) { // expected result } mock.close(); // Test long methods IOUtils.copyLarge(mock, cos); assertEquals("getByteCount()", size, cos.getByteCount()); assertEquals("resetByteCount()", size, cos.resetByteCount()); } private void assertByteArrayEquals(String msg, byte[] array, int start, int end) { for (int i = start; i < end; i++) { assertEquals(msg+": array[" + i + "] mismatch", array[i], i-start); } } } Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO CountingOutputStreamTest.java source code file: |
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