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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.statistics;
import java.util.Arrays;
import java.util.logging.Logger;
import com.yahoo.container.StatisticsConfig;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
/**
* Check counters work.
*
* @author Steinar Knutsen
*/
public class CounterTestCase {
@Test
public void testBasic() {
Counter c = new Counter("test", Statistics.nullImplementation, false);
c.increment();
assertEquals(1, c.get());
c.increment(499);
assertEquals(500, c.get());
c.reset();
assertEquals(500, c.get());
c = new Counter("test", Statistics.nullImplementation, false, null, true);
c.increment();
assertEquals(1, c.get());
c.increment(499);
assertEquals(500, c.get());
c.reset();
assertEquals(0, c.get());
}
@Test
public void testObjectContracts() {
final String counterName = "test";
Counter c = new Counter(counterName, Statistics.nullImplementation, false);
Counter c2 = new Counter(counterName, Statistics.nullImplementation, false);
c2.increment();
assertEquals(c, c2);
assertEquals(c.hashCode(), c2.hashCode());
c2 = new Counter("nalle", Statistics.nullImplementation, false);
assertFalse("Different names should lead to different hashcodes",
c.hashCode() == c2.hashCode());
assertFalse("Different names should lead to equals() return false",
c.equals(c2));
String prefix = "com.yahoo.statistics.Counter";
String suffix = counterName + " 0";
String image = c.toString();
assertEquals(suffix, image.substring(image.length() - suffix.length()));
assertEquals(prefix, image.substring(0, prefix.length()));
}
@Test
public void testConfigStuff() {
Logger logger = Logger.getLogger(Counter.class.getName());
boolean initUseParentHandlers = logger.getUseParentHandlers();
logger.setUseParentHandlers(false);
MockStatistics m = new MockStatistics();
final String joppe = "joppe";
StatisticsConfig config = new StatisticsConfig(
new StatisticsConfig.Builder().counterresets(Arrays
.asList(new StatisticsConfig.Counterresets.Builder[] { new StatisticsConfig.Counterresets.Builder()
.name(joppe) })));
m.config = config;
Counter c = new Counter("nalle", m, true);
Counter c2 = new Counter(joppe, m, true);
c.increment();
c2.increment();
assertEquals(1L, c.get());
assertEquals(1L, c2.get());
c.run();
c2.run();
assertEquals(1L, c.get());
assertEquals(0L, c2.get());
logger.setUseParentHandlers(initUseParentHandlers);
}
public class MockStatistics implements Statistics {
public StatisticsConfig config = null;
public int registerCount = 0;
@Override
public void register(Handle h) {
registerCount += 1;
}
@Override
public void remove(String name) {
}
@Override
public StatisticsConfig getConfig() {
return config;
}
@Override
public int purge() {
return 0;
}
}
}
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