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/*-
* ============LICENSE_START=======================================================
* ONAP-Logging
* ================================================================================
* Copyright (C) 2018-2020 Ericsson, AT&T. 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.onap.policy.common.logging.flexlogger;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.onap.policy.common.logging.flexlogger.PropertyUtil.Listener;
import org.powermock.reflect.Whitebox;
public class PropertyUtilTest {
private static final String TIMER_FIELD = "timer";
private static final File FILE = new File("target/test.properties");
private static Timer saveTimer;
private TimerTask task;
private Timer timer;
private TestListener testListener;
@BeforeClass
public static void setUpBeforeClass() {
saveTimer = Whitebox.getInternalState(PropertyUtil.LazyHolder.class, TIMER_FIELD);
}
@AfterClass
public static void tearDownAfterClass() {
Whitebox.setInternalState(PropertyUtil.LazyHolder.class, TIMER_FIELD, saveTimer);
}
/**
* Perform test case set up.
*/
@Before
public void setUp() throws IOException {
task = null;
timer = mock(Timer.class);
Whitebox.setInternalState(PropertyUtil.LazyHolder.class, TIMER_FIELD, timer);
doAnswer(args -> {
task = args.getArgument(0, TimerTask.class);
return null;
}).when(timer).schedule(any(TimerTask.class), anyLong(), anyLong());
testListener = new TestListener();
FileOutputStream fileOutputStream = new FileOutputStream(FILE);
Properties properties = new Properties();
properties.put("testProperty", "testValue");
properties.store(fileOutputStream, "");
fileOutputStream.close();
}
@After
public void tearDown() throws IOException {
PropertyUtil.stopListening(FILE, testListener);
FILE.delete();
}
@Test
public void testTimer() {
assertNotNull(saveTimer);
}
@Test
public void testGetProperties() throws IOException {
FileOutputStream fileOutputStream = new FileOutputStream(FILE);
Properties properties = new Properties();
properties.put("testProperty", "testValue");
properties.store(fileOutputStream, "");
fileOutputStream.close();
Properties readProperties = PropertyUtil.getProperties(FILE, testListener);
assertEquals("testValue", readProperties.getProperty("testProperty"));
}
@Test
public void testPropertiesChanged() throws IOException, InterruptedException {
PropertyUtil.getProperties(FILE, testListener);
FileOutputStream fileOutputStream = new FileOutputStream(FILE);
Properties newProperties = new Properties();
newProperties.put("testProperty", "testValueNew");
newProperties.store(fileOutputStream, "");
// fire task and verify that it notifies the listener
task.run();
assertTrue(testListener.isPropertiesChangedInvoked());
}
@Test
public void testStopListening() throws IOException {
FileOutputStream fileOutputStream = new FileOutputStream(FILE);
Properties properties = new Properties();
properties.put("testProperty", "testValue");
properties.store(fileOutputStream, "");
Properties readProperties = PropertyUtil.getProperties(FILE, testListener);
assertEquals("testValue", readProperties.getProperty("testProperty"));
PropertyUtil.stopListening(FILE, testListener);
properties.put("testProperty", "testValueNew");
properties.store(fileOutputStream, "");
fileOutputStream.close();
readProperties = PropertyUtil.getProperties(FILE, testListener);
// If stopListening did not remove the listener, the properties file will not be re-read
// until poll expires and
// hence "testValue" will be returned here instead of "testNewValue"
assertEquals("testValueNew", readProperties.getProperty("testProperty"));
}
/**
* The {@link #propertiesChanged(Properties, Set)} method is invoked via a background
* thread, thus we have to use a latch to wait for it to be invoked.
*/
private class TestListener implements Listener {
private CountDownLatch latch = new CountDownLatch(1);
@Override
public void propertiesChanged(Properties properties, Set<String> changedKeys) {
latch.countDown();
}
public boolean isPropertiesChangedInvoked() throws InterruptedException {
return latch.await(5, TimeUnit.SECONDS);
}
}
}
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