| package org.apache.logging.log4j.core.layout;/* |
| * 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. |
| */ |
| |
| import java.nio.charset.Charset; |
| |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.*; |
| |
| /** |
| * Tests AbstractStringLayout. |
| */ |
| public class AbstractStringLayoutTest { |
| static class ConcreteStringLayout extends AbstractStringLayout { |
| public static int DEFAULT_STRING_BUILDER_SIZE = AbstractStringLayout.DEFAULT_STRING_BUILDER_SIZE; |
| public static int MAX_STRING_BUILDER_SIZE = AbstractStringLayout.MAX_STRING_BUILDER_SIZE; |
| |
| public ConcreteStringLayout() { |
| super(Charset.defaultCharset()); |
| } |
| |
| public static StringBuilder getStringBuilder() { |
| return AbstractStringLayout.getStringBuilder(); |
| } |
| |
| @Override |
| public String toSerializable(final LogEvent event) { |
| return null; |
| } |
| } |
| |
| @Test |
| public void testGetStringBuilderCapacityRestrictedToMax() throws Exception { |
| final StringBuilder sb = ConcreteStringLayout.getStringBuilder(); |
| final int initialCapacity = sb.capacity(); |
| assertEquals("initial capacity", ConcreteStringLayout.DEFAULT_STRING_BUILDER_SIZE, sb.capacity()); |
| |
| final int SMALL = 100; |
| final String smallMessage = new String(new char[SMALL]); |
| sb.append(smallMessage); |
| assertTrue("capacity not grown", sb.capacity() == initialCapacity); |
| assertEquals("length=msg length", SMALL, sb.length()); |
| |
| final StringBuilder sb2 = ConcreteStringLayout.getStringBuilder(); |
| assertEquals("capacity unchanged", sb2.capacity(), initialCapacity); |
| assertEquals("empty, ready for use", 0, sb2.length()); |
| |
| final int LARGE = ConcreteStringLayout.MAX_STRING_BUILDER_SIZE * 2; |
| final String largeMessage = new String(new char[LARGE]); |
| sb2.append(largeMessage); |
| assertTrue("capacity grown to fit msg length", sb2.capacity() >= LARGE); |
| assertTrue("capacity is now greater than max length", sb2.capacity() >= ConcreteStringLayout.MAX_STRING_BUILDER_SIZE); |
| assertEquals("length=msg length", LARGE, sb2.length()); |
| sb2.setLength(0); // set 0 before next getStringBuilder() call |
| assertEquals("empty, cleared", 0, sb2.length()); |
| assertTrue("capacity remains very large", sb2.capacity() >= ConcreteStringLayout.MAX_STRING_BUILDER_SIZE); |
| |
| final StringBuilder sb3 = ConcreteStringLayout.getStringBuilder(); |
| assertEquals("capacity, trimmed to MAX_STRING_BUILDER_SIZE", ConcreteStringLayout.MAX_STRING_BUILDER_SIZE, sb3.capacity()); |
| assertEquals("empty, ready for use", 0, sb3.length()); |
| } |
| } |