Source Code Cross Referenced for IOUtilsTestCase.java in  » Library » apache-common-IO » org » apache » commons » io » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Library » apache common IO » org.apache.commons.io 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.commons.io;
018:
019:        import java.io.File;
020:        import java.io.FileInputStream;
021:        import java.io.FileOutputStream;
022:        import java.io.FileReader;
023:        import java.io.FileWriter;
024:        import java.io.IOException;
025:        import java.io.InputStream;
026:        import java.io.InputStreamReader;
027:        import java.io.Reader;
028:        import java.util.Arrays;
029:        import java.util.List;
030:
031:        import org.apache.commons.io.testtools.FileBasedTestCase;
032:
033:        // Note: jdk1.2 dependency
034:
035:        /**
036:         * This is used to test IOUtils for correctness. The following checks are performed:
037:         * <ul>
038:         *   <li>The return must not be null, must be the same type and equals() to the method's second arg</li>
039:         *   <li>All bytes must have been read from the source (available() == 0)</li>
040:         *   <li>The source and destination content must be identical (byte-wise comparison check)</li>
041:         *   <li>The output stream must not have been closed (a byte/char is written to test this, and
042:         *   subsequent size checked)</li>
043:         * </ul>
044:         * Due to interdependencies in IOUtils and IOUtilsTestlet, one bug may cause
045:         * multiple tests to fail.
046:         *
047:         * @author <a href="mailto:jefft@apache.org">Jeff Turner</a>
048:         * @author Gareth Davis
049:         * @author Ian Springer
050:         */
051:        public class IOUtilsTestCase extends FileBasedTestCase {
052:
053:            /** Determine if this is windows. */
054:            private static final boolean WINDOWS = (File.separatorChar == '\\');
055:            /*
056:             * Note: this is not particularly beautiful code. A better way to check for
057:             * flush and close status would be to implement "trojan horse" wrapper
058:             * implementations of the various stream classes, which set a flag when
059:             * relevant methods are called. (JT)
060:             */
061:
062:            private static final int FILE_SIZE = 1024 * 4 + 1;
063:
064:            private File m_testFile;
065:
066:            public void setUp() {
067:                try {
068:                    getTestDirectory().mkdirs();
069:                    m_testFile = new File(getTestDirectory(), "file2-test.txt");
070:
071:                    createFile(m_testFile, FILE_SIZE);
072:                } catch (IOException ioe) {
073:                    throw new RuntimeException("Can't run this test because "
074:                            + "environment could not be built: "
075:                            + ioe.getMessage());
076:                }
077:            }
078:
079:            public void tearDown() {
080:                try {
081:                    FileUtils.deleteDirectory(getTestDirectory());
082:                } catch (IOException ioe) {
083:                    // Ignore, because by this time, it is too late.
084:                }
085:            }
086:
087:            public IOUtilsTestCase(String name) {
088:                super (name);
089:            }
090:
091:            //-----------------------------------------------------------------------
092:            public void testConstants() throws Exception {
093:                assertEquals('/', IOUtils.DIR_SEPARATOR_UNIX);
094:                assertEquals('\\', IOUtils.DIR_SEPARATOR_WINDOWS);
095:                assertEquals("\n", IOUtils.LINE_SEPARATOR_UNIX);
096:                assertEquals("\r\n", IOUtils.LINE_SEPARATOR_WINDOWS);
097:                if (WINDOWS) {
098:                    assertEquals('\\', IOUtils.DIR_SEPARATOR);
099:                    assertEquals("\r\n", IOUtils.LINE_SEPARATOR);
100:                } else {
101:                    assertEquals('/', IOUtils.DIR_SEPARATOR);
102:                    assertEquals("\n", IOUtils.LINE_SEPARATOR);
103:                }
104:            }
105:
106:            //-----------------------------------------------------------------------
107:            /** Assert that the contents of two byte arrays are the same. */
108:            private void assertEqualContent(byte[] b0, byte[] b1)
109:                    throws IOException {
110:                assertTrue(
111:                        "Content not equal according to java.util.Arrays#equals()",
112:                        Arrays.equals(b0, b1));
113:            }
114:
115:            public void testInputStreamToString() throws Exception {
116:                FileInputStream fin = new FileInputStream(m_testFile);
117:                try {
118:                    String out = IOUtils.toString(fin);
119:                    assertNotNull(out);
120:                    assertTrue("Not all bytes were read", fin.available() == 0);
121:                    assertTrue("Wrong output size: out.length()="
122:                            + out.length() + "!=" + FILE_SIZE,
123:                            out.length() == FILE_SIZE);
124:                } finally {
125:                    fin.close();
126:                }
127:            }
128:
129:            public void testReaderToString() throws Exception {
130:                FileReader fin = new FileReader(m_testFile);
131:                try {
132:                    String out = IOUtils.toString(fin);
133:                    assertNotNull(out);
134:                    assertTrue("Wrong output size: out.length()="
135:                            + out.length() + "!=" + FILE_SIZE,
136:                            out.length() == FILE_SIZE);
137:                } finally {
138:                    fin.close();
139:                }
140:            }
141:
142:            public void testStringToOutputStream() throws Exception {
143:                File destination = newFile("copy5.txt");
144:                FileReader fin = new FileReader(m_testFile);
145:                String str;
146:                try {
147:                    // Create our String. Rely on testReaderToString() to make sure this is valid.
148:                    str = IOUtils.toString(fin);
149:                } finally {
150:                    fin.close();
151:                }
152:
153:                FileOutputStream fout = new FileOutputStream(destination);
154:                try {
155:                    CopyUtils.copy(str, fout);
156:                    //Note: this method *does* flush. It is equivalent to:
157:                    //  OutputStreamWriter _out = new OutputStreamWriter(fout);
158:                    //  CopyUtils.copy( str, _out, 4096 ); // copy( Reader, Writer, int );
159:                    //  _out.flush();
160:                    //  out = fout;
161:                    // note: we don't flush here; this IOUtils method does it for us
162:
163:                    checkFile(destination, m_testFile);
164:                    checkWrite(fout);
165:                } finally {
166:                    fout.close();
167:                }
168:                deleteFile(destination);
169:            }
170:
171:            public void testStringToWriter() throws Exception {
172:                File destination = newFile("copy6.txt");
173:                FileReader fin = new FileReader(m_testFile);
174:                String str;
175:                try {
176:                    // Create our String. Rely on testReaderToString() to make sure this is valid.
177:                    str = IOUtils.toString(fin);
178:                } finally {
179:                    fin.close();
180:                }
181:
182:                FileWriter fout = new FileWriter(destination);
183:                try {
184:                    CopyUtils.copy(str, fout);
185:                    fout.flush();
186:
187:                    checkFile(destination, m_testFile);
188:                    checkWrite(fout);
189:                } finally {
190:                    fout.close();
191:                }
192:                deleteFile(destination);
193:            }
194:
195:            public void testInputStreamToByteArray() throws Exception {
196:                FileInputStream fin = new FileInputStream(m_testFile);
197:                try {
198:                    byte[] out = IOUtils.toByteArray(fin);
199:                    assertNotNull(out);
200:                    assertTrue("Not all bytes were read", fin.available() == 0);
201:                    assertTrue("Wrong output size: out.length=" + out.length
202:                            + "!=" + FILE_SIZE, out.length == FILE_SIZE);
203:                    assertEqualContent(out, m_testFile);
204:                } finally {
205:                    fin.close();
206:                }
207:            }
208:
209:            public void testStringToByteArray() throws Exception {
210:                FileReader fin = new FileReader(m_testFile);
211:                try {
212:                    // Create our String. Rely on testReaderToString() to make sure this is valid.
213:                    String str = IOUtils.toString(fin);
214:
215:                    byte[] out = IOUtils.toByteArray(str);
216:                    assertEqualContent(str.getBytes(), out);
217:                } finally {
218:                    fin.close();
219:                }
220:            }
221:
222:            public void testByteArrayToWriter() throws Exception {
223:                File destination = newFile("copy7.txt");
224:                FileInputStream fin = new FileInputStream(m_testFile);
225:                byte[] in;
226:                try {
227:                    // Create our byte[]. Rely on testInputStreamToByteArray() to make sure this is valid.
228:                    in = IOUtils.toByteArray(fin);
229:                } finally {
230:                    fin.close();
231:                }
232:
233:                FileWriter fout = new FileWriter(destination);
234:                try {
235:                    CopyUtils.copy(in, fout);
236:                    fout.flush();
237:                    checkFile(destination, m_testFile);
238:                    checkWrite(fout);
239:                } finally {
240:                    fout.close();
241:                }
242:                deleteFile(destination);
243:            }
244:
245:            public void testByteArrayToString() throws Exception {
246:                FileInputStream fin = new FileInputStream(m_testFile);
247:                try {
248:                    byte[] in = IOUtils.toByteArray(fin);
249:                    // Create our byte[]. Rely on testInputStreamToByteArray() to make sure this is valid.
250:                    String str = IOUtils.toString(in);
251:                    assertEqualContent(in, str.getBytes());
252:                } finally {
253:                    fin.close();
254:                }
255:            }
256:
257:            /**
258:             * Test for {@link IOUtils#toInputStream(String)} and {@link IOUtils#toInputStream(String, String)}.
259:             * Note, this test utilizes on {@link IOUtils#toByteArray(java.io.InputStream)} and so relies on
260:             * {@link #testInputStreamToByteArray()} to ensure this method functions correctly.
261:             *
262:             * @throws Exception on error
263:             */
264:            public void testStringToInputStream() throws Exception {
265:                String str = "Abc123Xyz!";
266:                InputStream inStream = IOUtils.toInputStream(str);
267:                byte[] bytes = IOUtils.toByteArray(inStream);
268:                assertEqualContent(str.getBytes(), bytes);
269:                inStream = IOUtils.toInputStream(str, null);
270:                bytes = IOUtils.toByteArray(inStream);
271:                assertEqualContent(str.getBytes(), bytes);
272:                inStream = IOUtils.toInputStream(str, "UTF-8");
273:                bytes = IOUtils.toByteArray(inStream);
274:                assertEqualContent(str.getBytes("UTF-8"), bytes);
275:            }
276:
277:            public void testByteArrayToOutputStream() throws Exception {
278:                File destination = newFile("copy8.txt");
279:                FileInputStream fin = new FileInputStream(m_testFile);
280:                byte[] in;
281:                try {
282:                    // Create our byte[]. Rely on testInputStreamToByteArray() to make sure this is valid.
283:                    in = IOUtils.toByteArray(fin);
284:                } finally {
285:                    fin.close();
286:                }
287:
288:                FileOutputStream fout = new FileOutputStream(destination);
289:                try {
290:                    CopyUtils.copy(in, fout);
291:
292:                    fout.flush();
293:
294:                    checkFile(destination, m_testFile);
295:                    checkWrite(fout);
296:                } finally {
297:                    fout.close();
298:                }
299:                deleteFile(destination);
300:            }
301:
302:            public void testInputStreamToCharArray() throws Exception {
303:                FileInputStream fin = new FileInputStream(m_testFile);
304:                try {
305:                    char[] out = IOUtils.toCharArray(fin);
306:                    assertNotNull(out);
307:                    assertTrue("Not all chars were read", fin.available() == 0);
308:                    assertTrue("Wrong output size: out.length=" + out.length
309:                            + "!=" + FILE_SIZE, out.length == FILE_SIZE);
310:                    assertEqualContent(out, m_testFile);
311:                } finally {
312:                    fin.close();
313:                }
314:            }
315:
316:            public void testInputStreamToCharArrayWithEncoding()
317:                    throws Exception {
318:                FileInputStream fin = new FileInputStream(m_testFile);
319:                try {
320:                    char[] out = IOUtils.toCharArray(fin, "UTF-8");
321:                    assertNotNull(out);
322:                    assertTrue("Not all chars were read", fin.available() == 0);
323:                    assertTrue("Wrong output size: out.length=" + out.length
324:                            + "!=" + FILE_SIZE, out.length == FILE_SIZE);
325:                    assertEqualContent(out, m_testFile);
326:                } finally {
327:                    fin.close();
328:                }
329:            }
330:
331:            public void testReaderToCharArray() throws Exception {
332:                FileReader fr = new FileReader(m_testFile);
333:                try {
334:                    char[] out = IOUtils.toCharArray(fr);
335:                    assertNotNull(out);
336:                    assertTrue("Wrong output size: out.length=" + out.length
337:                            + "!=" + FILE_SIZE, out.length == FILE_SIZE);
338:                    assertEqualContent(out, m_testFile);
339:                } finally {
340:                    fr.close();
341:                }
342:            }
343:
344:            //-----------------------------------------------------------------------
345:            public void testReadLines_InputStream() throws Exception {
346:                File file = newFile("lines.txt");
347:                InputStream in = null;
348:                try {
349:                    String[] data = new String[] { "hello", "world", "",
350:                            "this is", "some text" };
351:                    createLineBasedFile(file, data);
352:
353:                    in = new FileInputStream(file);
354:                    List lines = IOUtils.readLines(in);
355:                    assertEquals(Arrays.asList(data), lines);
356:                    assertEquals(-1, in.read());
357:                } finally {
358:                    IOUtils.closeQuietly(in);
359:                    deleteFile(file);
360:                }
361:            }
362:
363:            //-----------------------------------------------------------------------
364:            public void testReadLines_InputStream_String() throws Exception {
365:                File file = newFile("lines.txt");
366:                InputStream in = null;
367:                try {
368:                    String[] data = new String[] { "hello", "/u1234", "",
369:                            "this is", "some text" };
370:                    createLineBasedFile(file, data);
371:
372:                    in = new FileInputStream(file);
373:                    List lines = IOUtils.readLines(in, "UTF-8");
374:                    assertEquals(Arrays.asList(data), lines);
375:                    assertEquals(-1, in.read());
376:                } finally {
377:                    IOUtils.closeQuietly(in);
378:                    deleteFile(file);
379:                }
380:            }
381:
382:            //-----------------------------------------------------------------------
383:            public void testReadLines_Reader() throws Exception {
384:                File file = newFile("lines.txt");
385:                Reader in = null;
386:                try {
387:                    String[] data = new String[] { "hello", "/u1234", "",
388:                            "this is", "some text" };
389:                    createLineBasedFile(file, data);
390:
391:                    in = new InputStreamReader(new FileInputStream(file));
392:                    List lines = IOUtils.readLines(in);
393:                    assertEquals(Arrays.asList(data), lines);
394:                    assertEquals(-1, in.read());
395:                } finally {
396:                    IOUtils.closeQuietly(in);
397:                    deleteFile(file);
398:                }
399:            }
400:
401:        }
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