/**
* 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.hbase.metrics.impl;
import static org.junit.Assert.assertEquals;
import org.apache.hadoop.hbase.metrics.Counter;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* Test class for {@link CounterImpl}.
*/
@Category(SmallTests.class)
public class TestCounterImpl {
private Counter counter;
@Before public void setup() {
this.counter = new CounterImpl();
}
@Test public void testCounting() {
counter.increment();
assertEquals(1L, counter.getCount());
counter.increment();
assertEquals(2L, counter.getCount());
counter.increment(2L);
assertEquals(4L, counter.getCount());
counter.increment(-1L);
assertEquals(3L, counter.getCount());
counter.decrement();
assertEquals(2L, counter.getCount());
counter.decrement();
assertEquals(1L, counter.getCount());
counter.decrement(4L);
assertEquals(-3L, counter.getCount());
counter.decrement(-3L);
assertEquals(0L, counter.getCount());
}
}