Source Code Cross Referenced for TestUnboundedFifoBuffer.java in  » Library » Apache-common-Collections » org » apache » commons » collections » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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


001:        /*
002:         *  Copyright 2001-2004 The Apache Software Foundation
003:         *
004:         *  Licensed under the Apache License, Version 2.0 (the "License");
005:         *  you may not use this file except in compliance with the License.
006:         *  You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         *  Unless required by applicable law or agreed to in writing, software
011:         *  distributed under the License is distributed on an "AS IS" BASIS,
012:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         *  See the License for the specific language governing permissions and
014:         *  limitations under the License.
015:         */
016:        package org.apache.commons.collections;
017:
018:        import java.util.ArrayList;
019:        import java.util.Collection;
020:        import java.util.Iterator;
021:
022:        import junit.framework.Test;
023:
024:        import org.apache.commons.collections.collection.AbstractTestCollection;
025:
026:        /**
027:         * Test cases for UnboundedFifoBuffer.
028:         * 
029:         * @version $Revision: 219316 $ $Date: 2005-07-16 12:17:02 +0100 (Sat, 16 Jul 2005) $
030:         * 
031:         * @author Unknown
032:         */
033:        public class TestUnboundedFifoBuffer extends AbstractTestCollection {
034:
035:            public TestUnboundedFifoBuffer(String n) {
036:                super (n);
037:            }
038:
039:            public static Test suite() {
040:                return BulkTest.makeSuite(TestUnboundedFifoBuffer.class);
041:            }
042:
043:            //-----------------------------------------------------------------------
044:            /**
045:             *  Verifies that the ArrayList has the same elements in the same 
046:             *  sequence as the UnboundedFifoBuffer.
047:             */
048:            public void verify() {
049:                super .verify();
050:                Iterator iterator1 = collection.iterator();
051:                Iterator iterator2 = confirmed.iterator();
052:                while (iterator2.hasNext()) {
053:                    assertTrue(iterator1.hasNext());
054:                    Object o1 = iterator1.next();
055:                    Object o2 = iterator2.next();
056:                    assertEquals(o1, o2);
057:                }
058:            }
059:
060:            //-----------------------------------------------------------------------
061:            /**
062:             * Overridden because UnboundedFifoBuffer doesn't allow null elements.
063:             * @return false
064:             */
065:            public boolean isNullSupported() {
066:                return false;
067:            }
068:
069:            /**
070:             * Overridden because UnboundedFifoBuffer isn't fail fast.
071:             * @return false
072:             */
073:            public boolean isFailFastSupported() {
074:                return false;
075:            }
076:
077:            //-----------------------------------------------------------------------
078:            /**
079:             *  Returns an empty ArrayList.
080:             *
081:             *  @return an empty ArrayList
082:             */
083:            public Collection makeConfirmedCollection() {
084:                return new ArrayList();
085:            }
086:
087:            /**
088:             *  Returns a full ArrayList.
089:             *
090:             *  @return a full ArrayList
091:             */
092:            public Collection makeConfirmedFullCollection() {
093:                Collection c = makeConfirmedCollection();
094:                c.addAll(java.util.Arrays.asList(getFullElements()));
095:                return c;
096:            }
097:
098:            /**
099:             *  Returns an empty UnboundedFifoBuffer with a small capacity.
100:             *
101:             *  @return an empty UnboundedFifoBuffer
102:             */
103:            public Collection makeCollection() {
104:                return new UnboundedFifoBuffer(5);
105:            }
106:
107:            //-----------------------------------------------------------------------
108:            /**
109:             *  Tests that UnboundedFifoBuffer removes elements in the right order.
110:             */
111:            public void testUnboundedFifoBufferRemove() {
112:                resetFull();
113:                int size = confirmed.size();
114:                for (int i = 0; i < size; i++) {
115:                    Object o1 = ((UnboundedFifoBuffer) collection).remove();
116:                    Object o2 = ((ArrayList) confirmed).remove(0);
117:                    assertEquals("Removed objects should be equal", o1, o2);
118:                    verify();
119:                }
120:            }
121:
122:            /**
123:             * Tests that the constructor correctly throws an exception.
124:             */
125:            public void testConstructorException1() {
126:                try {
127:                    new UnboundedFifoBuffer(0);
128:                } catch (IllegalArgumentException ex) {
129:                    return;
130:                }
131:                fail();
132:            }
133:
134:            /**
135:             * Tests that the constructor correctly throws an exception.
136:             */
137:            public void testConstructorException2() {
138:                try {
139:                    new UnboundedFifoBuffer(-20);
140:                } catch (IllegalArgumentException ex) {
141:                    return;
142:                }
143:                fail();
144:            }
145:
146:            //-----------------------------------------------------------------------
147:            public void testInternalStateAdd() {
148:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(2);
149:                assertEquals(3, test.m_buffer.length);
150:                assertEquals(0, test.m_head);
151:                assertEquals(0, test.m_tail);
152:                test.add("A");
153:                assertEquals(3, test.m_buffer.length);
154:                assertEquals(0, test.m_head);
155:                assertEquals(1, test.m_tail);
156:                test.add("B");
157:                assertEquals(3, test.m_buffer.length);
158:                assertEquals(0, test.m_head);
159:                assertEquals(2, test.m_tail);
160:                test.add("C"); // forces m_buffer increase
161:                assertEquals(5, test.m_buffer.length);
162:                assertEquals(0, test.m_head);
163:                assertEquals(3, test.m_tail);
164:                test.add("D");
165:                assertEquals(5, test.m_buffer.length);
166:                assertEquals(0, test.m_head);
167:                assertEquals(4, test.m_tail);
168:            }
169:
170:            public void testInternalStateAddWithWrap() {
171:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
172:                assertEquals(4, test.m_buffer.length);
173:                assertEquals(0, test.m_head);
174:                assertEquals(0, test.m_tail);
175:                test.add("A");
176:                assertEquals(4, test.m_buffer.length);
177:                assertEquals(0, test.m_head);
178:                assertEquals(1, test.m_tail);
179:                test.add("B");
180:                assertEquals(4, test.m_buffer.length);
181:                assertEquals(0, test.m_head);
182:                assertEquals(2, test.m_tail);
183:                test.add("C");
184:                assertEquals(4, test.m_buffer.length);
185:                assertEquals(0, test.m_head);
186:                assertEquals(3, test.m_tail);
187:                test.remove("A");
188:                assertEquals(4, test.m_buffer.length);
189:                assertEquals(1, test.m_head);
190:                assertEquals(3, test.m_tail);
191:                test.remove("B");
192:                assertEquals(4, test.m_buffer.length);
193:                assertEquals(2, test.m_head);
194:                assertEquals(3, test.m_tail);
195:                test.add("D");
196:                assertEquals(4, test.m_buffer.length);
197:                assertEquals(2, test.m_head);
198:                assertEquals(0, test.m_tail);
199:                test.add("E");
200:                assertEquals(4, test.m_buffer.length);
201:                assertEquals(2, test.m_head);
202:                assertEquals(1, test.m_tail);
203:            }
204:
205:            public void testInternalStateRemove1() {
206:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
207:                test.add("A");
208:                test.add("B");
209:                test.add("C");
210:                assertEquals(5, test.m_buffer.length);
211:                assertEquals(0, test.m_head);
212:                assertEquals(3, test.m_tail);
213:
214:                test.remove("A");
215:                assertEquals(5, test.m_buffer.length);
216:                assertEquals(1, test.m_head);
217:                assertEquals(3, test.m_tail);
218:
219:                test.add("D");
220:                assertEquals(5, test.m_buffer.length);
221:                assertEquals(1, test.m_head);
222:                assertEquals(4, test.m_tail);
223:            }
224:
225:            public void testInternalStateRemove2() {
226:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
227:                test.add("A");
228:                test.add("B");
229:                test.add("C");
230:                assertEquals(5, test.m_buffer.length);
231:                assertEquals(0, test.m_head);
232:                assertEquals(3, test.m_tail);
233:
234:                test.remove("B");
235:                assertEquals(5, test.m_buffer.length);
236:                assertEquals(0, test.m_head);
237:                assertEquals(2, test.m_tail);
238:
239:                test.add("D");
240:                assertEquals(5, test.m_buffer.length);
241:                assertEquals(0, test.m_head);
242:                assertEquals(3, test.m_tail);
243:            }
244:
245:            public void testInternalStateIteratorRemove1() {
246:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
247:                test.add("A");
248:                test.add("B");
249:                test.add("C");
250:                assertEquals(5, test.m_buffer.length);
251:                assertEquals(0, test.m_head);
252:                assertEquals(3, test.m_tail);
253:
254:                Iterator it = test.iterator();
255:                it.next();
256:                it.remove();
257:                assertEquals(5, test.m_buffer.length);
258:                assertEquals(1, test.m_head);
259:                assertEquals(3, test.m_tail);
260:
261:                test.add("D");
262:                assertEquals(5, test.m_buffer.length);
263:                assertEquals(1, test.m_head);
264:                assertEquals(4, test.m_tail);
265:            }
266:
267:            public void testInternalStateIteratorRemove2() {
268:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
269:                test.add("A");
270:                test.add("B");
271:                test.add("C");
272:
273:                Iterator it = test.iterator();
274:                it.next();
275:                it.next();
276:                it.remove();
277:                assertEquals(5, test.m_buffer.length);
278:                assertEquals(0, test.m_head);
279:                assertEquals(2, test.m_tail);
280:
281:                test.add("D");
282:                assertEquals(5, test.m_buffer.length);
283:                assertEquals(0, test.m_head);
284:                assertEquals(3, test.m_tail);
285:            }
286:
287:            public void testInternalStateIteratorRemoveWithTailAtEnd1() {
288:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
289:                test.add("A");
290:                test.add("B");
291:                test.add("C");
292:                test.remove("A");
293:                test.add("D");
294:                assertEquals(4, test.m_buffer.length);
295:                assertEquals(1, test.m_head);
296:                assertEquals(0, test.m_tail);
297:
298:                Iterator it = test.iterator();
299:                assertEquals("B", it.next());
300:                it.remove();
301:                assertEquals(4, test.m_buffer.length);
302:                assertEquals(2, test.m_head);
303:                assertEquals(0, test.m_tail);
304:            }
305:
306:            public void testInternalStateIteratorRemoveWithTailAtEnd2() {
307:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
308:                test.add("A");
309:                test.add("B");
310:                test.add("C");
311:                test.remove("A");
312:                test.add("D");
313:                assertEquals(4, test.m_buffer.length);
314:                assertEquals(1, test.m_head);
315:                assertEquals(0, test.m_tail);
316:
317:                Iterator it = test.iterator();
318:                assertEquals("B", it.next());
319:                assertEquals("C", it.next());
320:                it.remove();
321:                assertEquals(4, test.m_buffer.length);
322:                assertEquals(1, test.m_head);
323:                assertEquals(3, test.m_tail);
324:            }
325:
326:            public void testInternalStateIteratorRemoveWithTailAtEnd3() {
327:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
328:                test.add("A");
329:                test.add("B");
330:                test.add("C");
331:                test.remove("A");
332:                test.add("D");
333:                assertEquals(4, test.m_buffer.length);
334:                assertEquals(1, test.m_head);
335:                assertEquals(0, test.m_tail);
336:
337:                Iterator it = test.iterator();
338:                assertEquals("B", it.next());
339:                assertEquals("C", it.next());
340:                assertEquals("D", it.next());
341:                it.remove();
342:                assertEquals(4, test.m_buffer.length);
343:                assertEquals(1, test.m_head);
344:                assertEquals(3, test.m_tail);
345:            }
346:
347:            public void testInternalStateIteratorRemoveWithWrap1() {
348:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
349:                test.add("A");
350:                test.add("B");
351:                test.add("C");
352:                test.remove("A");
353:                test.remove("B");
354:                test.add("D");
355:                test.add("E");
356:                assertEquals(4, test.m_buffer.length);
357:                assertEquals(2, test.m_head);
358:                assertEquals(1, test.m_tail);
359:
360:                Iterator it = test.iterator();
361:                assertEquals("C", it.next());
362:                it.remove();
363:                assertEquals(4, test.m_buffer.length);
364:                assertEquals(3, test.m_head);
365:                assertEquals(1, test.m_tail);
366:            }
367:
368:            public void testInternalStateIteratorRemoveWithWrap2() {
369:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
370:                test.add("A");
371:                test.add("B");
372:                test.add("C");
373:                test.remove("A");
374:                test.remove("B");
375:                test.add("D");
376:                test.add("E");
377:                assertEquals(4, test.m_buffer.length);
378:                assertEquals(2, test.m_head);
379:                assertEquals(1, test.m_tail);
380:
381:                Iterator it = test.iterator();
382:                assertEquals("C", it.next());
383:                assertEquals("D", it.next());
384:                it.remove();
385:                assertEquals(4, test.m_buffer.length);
386:                assertEquals(2, test.m_head);
387:                assertEquals(0, test.m_tail);
388:            }
389:
390:            public void testInternalStateIteratorRemoveWithWrap3() {
391:                UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
392:                test.add("A");
393:                test.add("B");
394:                test.add("C");
395:                test.remove("A");
396:                test.remove("B");
397:                test.add("D");
398:                test.add("E");
399:                assertEquals(4, test.m_buffer.length);
400:                assertEquals(2, test.m_head);
401:                assertEquals(1, test.m_tail);
402:
403:                Iterator it = test.iterator();
404:                assertEquals("C", it.next());
405:                assertEquals("D", it.next());
406:                assertEquals("E", it.next());
407:                it.remove();
408:                assertEquals(4, test.m_buffer.length);
409:                assertEquals(2, test.m_head);
410:                assertEquals(0, test.m_tail);
411:            }
412:
413:        }
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