| /** |
| * 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.mapreduce; |
| |
| import java.io.IOException; |
| import java.util.Random; |
| |
| import org.junit.Test; |
| import static org.junit.Assert.*; |
| |
| /** |
| * TestCounters checks the sanity and recoverability of {@code Counters} |
| */ |
| public class TestCounters { |
| |
| /** |
| * Verify counter value works |
| */ |
| @Test |
| public void testCounterValue() { |
| final int NUMBER_TESTS = 100; |
| final int NUMBER_INC = 10; |
| final Random rand = new Random(); |
| for (int i = 0; i < NUMBER_TESTS; i++) { |
| long initValue = rand.nextInt(); |
| long expectedValue = initValue; |
| Counter counter = new Counter("foo", "bar", expectedValue); |
| assertEquals("Counter value is not initialized correctly", |
| expectedValue, counter.getValue()); |
| for (int j = 0; j < NUMBER_INC; j++) { |
| int incValue = rand.nextInt(); |
| counter.increment(incValue); |
| expectedValue += incValue; |
| assertEquals("Counter value is not incremented correctly", |
| expectedValue, counter.getValue()); |
| } |
| expectedValue = rand.nextInt(); |
| counter.setValue(expectedValue); |
| assertEquals("Counter value is not set correctly", |
| expectedValue, counter.getValue()); |
| } |
| } |
| |
| } |