// =================================================================================================
// Copyright 2011 Twitter, Inc.
// -------------------------------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this work except in compliance with the License.
// You may obtain a copy of the License in the LICENSE file, or 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 com.twitter.common.stats;
import org.junit.After;
import org.junit.Test;
import java.util.concurrent.atomic.AtomicLong;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
/**
* @author William Farner
*/
public class StatsTest {
@After
public void tearDown() {
Stats.flush();
}
@Test
public void testSimpleExport() {
AtomicLong var = Stats.exportLong("test_long");
assertCounter("test_long", 0);
var.incrementAndGet();
assertCounter("test_long", 1);
var.addAndGet(100);
assertCounter("test_long", 101);
}
@Test
public void testNormalizesSpace() {
AtomicLong leading = Stats.exportLong(" leading space");
AtomicLong trailing = Stats.exportLong("trailing space ");
AtomicLong surround = Stats.exportLong(" surround space ");
leading.incrementAndGet();
trailing.incrementAndGet();
surround.incrementAndGet();
assertCounter("__leading_space", 1);
assertCounter("trailing_space___", 1);
assertCounter("___surround_space___", 1);
}
@Test
public void testNormalizesIllegalChars() {
AtomicLong colon = Stats.exportLong("a:b");
AtomicLong plus = Stats.exportLong("b+c");
AtomicLong hyphen = Stats.exportLong("c-d");
AtomicLong slash = Stats.exportLong("d/f");
colon.incrementAndGet();
plus.incrementAndGet();
hyphen.incrementAndGet();
slash.incrementAndGet();
assertCounter("a_b", 1);
assertCounter("b_c", 1);
assertCounter("c_d", 1);
assertCounter("d_f", 1);
}
private void assertCounter(String name, long value) {
assertThat(Stats.<Long>getVariable(name).read(), is(value));
}
}