| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * Licensed 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. |
| */ |
| |
| |
| // |
| // Log4j uses the JUnit framework for internal unit testing. JUnit |
| // available from |
| // |
| // http://www.junit.org |
| package org.apache.log4j.helpers; |
| |
| import junit.framework.Test; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| |
| import org.apache.log4j.Level; |
| import org.apache.log4j.Logger; |
| import org.apache.log4j.helpers.CyclicBuffer; |
| import org.apache.log4j.spi.LoggingEvent; |
| |
| |
| /** |
| Unit test the {@link CyclicBuffer}. |
| |
| @author Ceki Gülcü |
| |
| */ |
| public class CyclicBufferTestCase extends TestCase { |
| static Logger logger = Logger.getLogger("x"); |
| static int MAX = 1000; |
| static LoggingEvent[] e = new LoggingEvent[MAX]; |
| |
| { |
| for (int i = 0; i < MAX; i++) { |
| e[i] = new LoggingEvent("", logger, Level.DEBUG, "e" + i, null); |
| } |
| } |
| |
| public CyclicBufferTestCase(String name) { |
| super(name); |
| } |
| |
| public void setUp() { |
| } |
| |
| public void test0() { |
| int size = 2; |
| |
| CyclicBuffer cb = new CyclicBuffer(size); |
| assertEquals(cb.getMaxSize(), size); |
| |
| cb.add(e[0]); |
| assertEquals(cb.length(), 1); |
| assertEquals(cb.get(), e[0]); |
| assertEquals(cb.length(), 0); |
| assertNull(cb.get()); |
| assertEquals(cb.length(), 0); |
| |
| cb = new CyclicBuffer(size); |
| cb.add(e[0]); |
| cb.add(e[1]); |
| assertEquals(cb.length(), 2); |
| assertEquals(cb.get(), e[0]); |
| assertEquals(cb.length(), 1); |
| assertEquals(cb.get(), e[1]); |
| assertEquals(cb.length(), 0); |
| assertNull(cb.get()); |
| assertEquals(cb.length(), 0); |
| } |
| |
| /** |
| Test a buffer of size 1,2,4,8,..,128 |
| */ |
| public void test1() { |
| for (int bufSize = 1; bufSize <= 128; bufSize *= 2) |
| doTest1(bufSize); |
| } |
| |
| void doTest1(int size) { |
| //System.out.println("Doing test with size = "+size); |
| CyclicBuffer cb = new CyclicBuffer(size); |
| |
| assertEquals(cb.getMaxSize(), size); |
| |
| for (int i = -(size + 10); i < (size + 10); i++) { |
| assertNull(cb.get(i)); |
| } |
| |
| for (int i = 0; i < MAX; i++) { |
| cb.add(e[i]); |
| |
| int limit = (i < (size - 1)) ? i : (size - 1); |
| |
| //System.out.println("\nLimit is " + limit + ", i="+i); |
| for (int j = limit; j >= 0; j--) { |
| //System.out.println("i= "+i+", j="+j); |
| assertEquals(cb.get(j), e[i - (limit - j)]); |
| } |
| |
| assertNull(cb.get(-1)); |
| assertNull(cb.get(limit + 1)); |
| } |
| } |
| |
| public void testResize() { |
| for (int isize = 1; isize <= 128; isize *= 2) { |
| doTestResize(isize, (isize / 2) + 1, (isize / 2) + 1); |
| doTestResize(isize, (isize / 2) + 1, isize + 10); |
| doTestResize(isize, isize + 10, (isize / 2) + 1); |
| doTestResize(isize, isize + 10, isize + 10); |
| } |
| } |
| |
| void doTestResize(int initialSize, int numberOfAdds, int newSize) { |
| //System.out.println("initialSize = "+initialSize+", numberOfAdds=" |
| // +numberOfAdds+", newSize="+newSize); |
| CyclicBuffer cb = new CyclicBuffer(initialSize); |
| |
| for (int i = 0; i < numberOfAdds; i++) { |
| cb.add(e[i]); |
| } |
| |
| cb.resize(newSize); |
| |
| int offset = numberOfAdds - initialSize; |
| |
| if (offset < 0) { |
| offset = 0; |
| } |
| |
| int len = (newSize < numberOfAdds) ? newSize : numberOfAdds; |
| len = (len < initialSize) ? len : initialSize; |
| |
| //System.out.println("Len = "+len+", offset="+offset); |
| for (int j = 0; j < len; j++) { |
| assertEquals(cb.get(j), e[offset + j]); |
| } |
| } |
| |
| public static Test suite() { |
| TestSuite suite = new TestSuite(); |
| suite.addTest(new CyclicBufferTestCase("test0")); |
| suite.addTest(new CyclicBufferTestCase("test1")); |
| suite.addTest(new CyclicBufferTestCase("testResize")); |
| |
| return suite; |
| } |
| } |