| /** |
| * 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.hadoop.yarn.util; |
| |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| /** |
| * Test class for {@link BoundedAppender}. |
| */ |
| public class TestBoundedAppender { |
| @Rule |
| public ExpectedException expected = ExpectedException.none(); |
| |
| @Test |
| public void initWithZeroLimitThrowsException() { |
| expected.expect(IllegalArgumentException.class); |
| expected.expectMessage("limit should be positive"); |
| |
| new BoundedAppender(0); |
| } |
| |
| @Test |
| public void nullAppendedNullStringRead() { |
| final BoundedAppender boundedAppender = new BoundedAppender(4); |
| boundedAppender.append(null); |
| |
| assertEquals("null appended, \"null\" read", "null", |
| boundedAppender.toString()); |
| } |
| |
| @Test |
| public void appendBelowLimitOnceValueIsReadCorrectly() { |
| final BoundedAppender boundedAppender = new BoundedAppender(2); |
| |
| boundedAppender.append("ab"); |
| |
| assertEquals("value appended is read correctly", "ab", |
| boundedAppender.toString()); |
| } |
| |
| @Test |
| public void appendValuesBelowLimitAreReadCorrectlyInFifoOrder() { |
| final BoundedAppender boundedAppender = new BoundedAppender(3); |
| |
| boundedAppender.append("ab"); |
| boundedAppender.append("cd"); |
| boundedAppender.append("e"); |
| boundedAppender.append("fg"); |
| |
| assertEquals("last values appended fitting limit are read correctly", |
| String.format(BoundedAppender.TRUNCATED_MESSAGES_TEMPLATE, 3, 7, "efg"), |
| boundedAppender.toString()); |
| } |
| |
| @Test |
| public void appendLastAboveLimitPreservesLastMessagePostfix() { |
| final BoundedAppender boundedAppender = new BoundedAppender(3); |
| |
| boundedAppender.append("ab"); |
| boundedAppender.append("cde"); |
| boundedAppender.append("fghij"); |
| |
| assertEquals( |
| "last value appended above limit postfix is read correctly", String |
| .format(BoundedAppender.TRUNCATED_MESSAGES_TEMPLATE, 3, 10, "hij"), |
| boundedAppender.toString()); |
| } |
| |
| @Test |
| public void appendMiddleAboveLimitPreservesLastMessageAndMiddlePostfix() { |
| final BoundedAppender boundedAppender = new BoundedAppender(3); |
| |
| boundedAppender.append("ab"); |
| boundedAppender.append("cde"); |
| |
| assertEquals("last value appended above limit postfix is read correctly", |
| String.format(BoundedAppender.TRUNCATED_MESSAGES_TEMPLATE, 3, 5, "cde"), |
| boundedAppender.toString()); |
| |
| boundedAppender.append("fg"); |
| |
| assertEquals( |
| "middle value appended above limit postfix and last value are " |
| + "read correctly", |
| String.format(BoundedAppender.TRUNCATED_MESSAGES_TEMPLATE, 3, 7, "efg"), |
| boundedAppender.toString()); |
| |
| boundedAppender.append("hijkl"); |
| |
| assertEquals( |
| "last value appended above limit postfix is read correctly", String |
| .format(BoundedAppender.TRUNCATED_MESSAGES_TEMPLATE, 3, 12, "jkl"), |
| boundedAppender.toString()); |
| } |
| } |