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/*
* Derby - Class org.apache.derbyTesting.functionTests.util.TimeZoneTestSetup
*
* 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.derbyTesting.junit;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.TimeZone;
import junit.framework.Test;
/**
* Decorator that changes the default timezone of the runtime environment
* for the duration of the test.
*/
public class TimeZoneTestSetup extends BaseTestSetup {
/** Original timezone. */
private TimeZone savedDefault;
/** The timezone to use as default while running the test. */
private TimeZone requestedDefault;
/**
* Wrap a test in a decorator that changes the default timezone.
* @param test the test to decorate
* @param timeZoneID the ID of the timezone to use
*/
public TimeZoneTestSetup(Test test, String timeZoneID) {
this(test, TimeZone.getTimeZone(timeZoneID));
}
/**
* Wrap a test in a decorator that changes the default timezone.
* @param test the test to decorate
* @param zone the timezone to use
*/
public TimeZoneTestSetup(Test test, TimeZone zone) {
super(test);
this.requestedDefault = zone;
}
/**
* Set the timezone.
*/
protected void setUp() {
savedDefault = TimeZone.getDefault();
setDefault(requestedDefault);
}
/**
* Reset the timezone.
*/
protected void tearDown() {
setDefault(savedDefault);
savedDefault = null;
requestedDefault = null;
}
public static void setDefault(final TimeZone tz) {
if (tz== null) {
throw new IllegalArgumentException("tz cannot be <null>");
}
AccessController.doPrivileged(
new PrivilegedAction<Void>() {
public Void run() {
TimeZone.setDefault(tz);
return null;
}});
}
}
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