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/*-
* ============LICENSE_START=======================================================
* Common Logging Library
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.cl.eelf;
import static org.junit.Assert.*;
import org.junit.Test;
import org.openecomp.cl.api.Logger;
import org.openecomp.cl.eelf.LoggerFactory;
/** This suite of tests is intended to exercise the basic functionality of the
* {@link LoggerFactory}. */
public class LoggerFactoryTest {
/** This test validates that the {@link LoggerFactory} is a singleton. */
@Test
public void loggerFactorySingletonTest() {
// Call getInstance() on the LoggerFactory twice.
LoggerFactory loggerFactory1 = LoggerFactory.getInstance();
LoggerFactory loggerFactory2 = LoggerFactory.getInstance();
// Validate that what we got was two references to the same instance
// of the LoggerFactory (ie: yes, it really is a singleton).
assertTrue("Expected references to the SAME LoggerFactory instance",
loggerFactory1 == loggerFactory2);
}
/** This test validates that we can request {@link Logger} instances from the
* {@link LoggerFactory} by specifying either a name to use as the logger's
* identifier, or a class. */
@Test
public void getLoggerTest() {
// Get an instance of the LoggerFactory.
LoggerFactory loggerFactory = LoggerFactory.getInstance();
// Request a Logger instance by specifying the name we want for
// the logger.
Logger myLoggerByName = loggerFactory.getLogger("UnitTestLogger");
// Validate that we got a logger back.
assertNotNull(myLoggerByName);
// Now, request a Logger instance by specifying a class as our logger
// identifier.
Logger myLoggerByClass = loggerFactory.getLogger(LoggerFactoryTest.class);
// Validate that we got a logger back.
assertNotNull(myLoggerByClass);
}
/** This test validates that the {@link LoggerFactory} will only produce a
* single unique {@link Logger} instance for each requested log name.
* <p>
* In other words, two requests for a {@link Logger} with the same name will
* produce two references to the same instance, not two unique {@link Logger}
* instances. */
@Test
public void getLoggerSingleInstanceForNameTest() {
// Get an instance of the LoggerFactory.
LoggerFactory loggerFactory = LoggerFactory.getInstance();
// Request a Logger instance by specifying the name we want for
// the logger.
Logger myFirstLogger = loggerFactory.getLogger("UnitTestLogger");
// Request another Logger instance, but specify the same name for
// the logger's identifier.
Logger mySecondLogger = loggerFactory.getLogger("UnitTestLogger");
// Validate, that because there was already a Logger instance with the
// specified name, we just get back a reference to that instance.
assertTrue("Expected references to the same logger instance", myFirstLogger == mySecondLogger);
// Now, make a third logger request, but specify a different name.
Logger myThirdLogger = loggerFactory.getLogger("AnotherUnitTestLogger");
// Validate that, in this case, we really do get a new instance.
assertFalse("Expected a unique logger instance", myFirstLogger == myThirdLogger);
assertFalse("Expected a unique logger instance", mySecondLogger == myThirdLogger);
}
/** This test validates that the {@link LoggerFactory} will only produce a
* single unique {@link Logger} instance for each requested class.
* <p>
* In other words, two requests for a {@link Logger} with the same class will
* produce two references to the same instance, not two unique {@link Logger}
* instances. */
@Test
public void getLoggerSingleInstanceForClassTest() {
// Get an instance of the LoggerFactory.
LoggerFactory loggerFactory = LoggerFactory.getInstance();
// Request a Logger instance by specifying the class to use as the
// logger's identifier.
Logger myFirstLogger = loggerFactory.getLogger(LoggerFactoryTest.class);
// Request another Logger instance, but specify the same class for
// the logger's identifier.
Logger mySecondLogger = loggerFactory.getLogger(LoggerFactoryTest.class);
// Validate, that because there was already a Logger instance with the
// specified class, we just get back a reference to that instance.
assertTrue("Expected references to the same logger instance", myFirstLogger == mySecondLogger);
// Now, make a third logger request, but specify a different class.
Logger myThirdLogger = loggerFactory.getLogger(LoggerFactory.class);
// Validate that, in this case, we really do get a new instance.
assertFalse("Expected a unique logger instance", myFirstLogger == myThirdLogger);
assertFalse("Expected a unique logger instance", mySecondLogger == myThirdLogger);
}
}
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