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Commons IO example source code file (CopyUtilsTest.java)
The Commons IO CopyUtilsTest.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; import java.io.ByteArrayInputStream; import java.io.InputStream; import java.io.OutputStream; import java.io.Reader; import java.io.StringWriter; import java.io.Writer; import java.util.Arrays; import org.apache.commons.io.output.ByteArrayOutputStream; import org.apache.commons.io.testtools.FileBasedTestCase; import org.apache.commons.io.testtools.YellOnCloseInputStream; import org.apache.commons.io.testtools.YellOnFlushAndCloseOutputStream; @SuppressWarnings("deprecation") // these are test cases for the deprecated CopyUtils /** * JUnit tests for CopyUtils. * * @author Jeff Turner * @author Matthew Hawthorne * @author <a href="mailto:jeremias@apache.org">Jeremias Maerki * @version $Id: CopyUtilsTest.java 1021986 2010-10-13 03:37:23Z ggregory $ * @see CopyUtils */ public class CopyUtilsTest extends FileBasedTestCase { /* * NOTE this is not particularly beautiful code. A better way to check for * flush and close status would be to implement "trojan horse" wrapper * implementations of the various stream classes, which set a flag when * relevant methods are called. (JT) */ private static final int FILE_SIZE = 1024 * 4 + 1; private byte[] inData = generateTestData(FILE_SIZE); public CopyUtilsTest(String testName) { super(testName); } // ---------------------------------------------------------------- // Setup // ---------------------------------------------------------------- @Override public void setUp() throws Exception { } @Override public void tearDown() throws Exception { } // ---------------------------------------------------------------- // Tests // ---------------------------------------------------------------- public void testCtor() { new CopyUtils(); // Nothing to assert, the constructor is public and does not blow up. } public void testCopy_byteArrayToOutputStream() throws Exception { ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); CopyUtils.copy(inData, out); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_byteArrayToWriter() throws Exception { ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII"); CopyUtils.copy(inData, writer); writer.flush(); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_byteArrayToWriterWithEncoding() throws Exception { String inDataStr = "data"; String charsetName = "UTF-8"; StringWriter writer = new StringWriter(); CopyUtils.copy(inDataStr.getBytes(charsetName), writer, charsetName); assertEquals(inDataStr, writer.toString()); } public void testCopy_inputStreamToOutputStream() throws Exception { InputStream in = new ByteArrayInputStream(inData); in = new YellOnCloseInputStream(in); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); int count = CopyUtils.copy(in, out); assertEquals("Not all bytes were read", 0, in.available()); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); assertEquals(inData.length, count); } public void testCopy_inputStreamToWriter() throws Exception { InputStream in = new ByteArrayInputStream(inData); in = new YellOnCloseInputStream(in); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII"); CopyUtils.copy(in, writer); writer.flush(); assertEquals("Not all bytes were read", 0, in.available()); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_inputStreamToWriterWithEncoding() throws Exception { String inDataStr = "data"; String charsetName = "UTF-8"; StringWriter writer = new StringWriter(); CopyUtils.copy(new ByteArrayInputStream(inDataStr.getBytes(charsetName)), writer, charsetName); assertEquals(inDataStr, writer.toString()); } public void testCopy_readerToOutputStream() throws Exception { InputStream in = new ByteArrayInputStream(inData); in = new YellOnCloseInputStream(in); Reader reader = new java.io.InputStreamReader(in, "US-ASCII"); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); CopyUtils.copy(reader, out); //Note: this method *does* flush. It is equivalent to: // OutputStreamWriter _out = new OutputStreamWriter(fout); // IOUtils.copy( fin, _out, 4096 ); // copy( Reader, Writer, int ); // _out.flush(); // out = fout; // Note: rely on the method to flush assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_readerToWriter() throws Exception { InputStream in = new ByteArrayInputStream(inData); in = new YellOnCloseInputStream(in); Reader reader = new java.io.InputStreamReader(in, "US-ASCII"); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII"); int count = CopyUtils.copy(reader, writer); writer.flush(); assertEquals( "The number of characters returned by copy is wrong", inData.length, count); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_stringToOutputStream() throws Exception { String str = new String(inData, "US-ASCII"); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); CopyUtils.copy(str, out); //Note: this method *does* flush. It is equivalent to: // OutputStreamWriter _out = new OutputStreamWriter(fout); // IOUtils.copy( str, _out, 4096 ); // copy( Reader, Writer, int ); // _out.flush(); // out = fout; // note: we don't flush here; this IOUtils method does it for us assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } public void testCopy_stringToWriter() throws Exception { String str = new String(inData, "US-ASCII"); ByteArrayOutputStream baout = new ByteArrayOutputStream(); OutputStream out = new YellOnFlushAndCloseOutputStream(baout, false, true); Writer writer = new java.io.OutputStreamWriter(out, "US-ASCII"); CopyUtils.copy(str, writer); writer.flush(); assertEquals("Sizes differ", inData.length, baout.size()); assertTrue("Content differs", Arrays.equals(inData, baout.toByteArray())); } } // CopyUtilsTest Other Commons IO examples (source code examples)Here is a short list of links related to this Commons IO CopyUtilsTest.java source code file: |
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