Java example source code file (SystemDefaultsSwitchTest.java)

This example Java source code file (SystemDefaultsSwitchTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

cet, default_locale_before_test, default_timezone_before_test, exception, locale, rule, systemdefaultsswitch, systemdefaultsswitchtest, test, test_default_locale, test_default_timezone, timezone, utc, util

The SystemDefaultsSwitchTest.java Java example source code

/*
 * 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.commons.lang3.test;

import static org.junit.Assert.assertEquals;

import java.util.Locale;
import java.util.TimeZone;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

public class SystemDefaultsSwitchTest {

    private static Locale TEST_DEFAULT_LOCALE;
    private static Locale DEFAULT_LOCALE_BEFORE_TEST;

    private static TimeZone DEFAULT_TIMEZONE_BEFORE_TEST;
    private static TimeZone TEST_DEFAULT_TIMEZONE;

    @BeforeClass
    public static void classSetUp() {
        DEFAULT_LOCALE_BEFORE_TEST = Locale.getDefault();
        if (!DEFAULT_LOCALE_BEFORE_TEST.equals(Locale.CANADA)) {
            Locale.setDefault(Locale.CANADA);
        } else {
            // you seem to be from Canada...
            Locale.setDefault(Locale.CHINESE);
        }
        TEST_DEFAULT_LOCALE = Locale.getDefault();

        DEFAULT_TIMEZONE_BEFORE_TEST = TimeZone.getDefault();
        TimeZone utc = TimeZone.getTimeZone("UTC");
        if (!DEFAULT_TIMEZONE_BEFORE_TEST.equals(utc)) {
            TimeZone.setDefault(utc);
        } else {
            TimeZone.setDefault(TimeZone.getTimeZone("GMT"));
        }
        TEST_DEFAULT_TIMEZONE = TimeZone.getDefault();
    }

    @Rule
    public SystemDefaultsSwitch defaultsSwitch = new SystemDefaultsSwitch();

    @Test
    public void testDefaultLocaleNoAnnotation() throws Exception {
        assertEquals(TEST_DEFAULT_LOCALE, Locale.getDefault());
    }

    @Test
    @SystemDefaults(locale = "en_EN")
    public void testUseDifferentLocale() throws Exception {
        assertEquals(new Locale("en", "EN"), Locale.getDefault());
    }

    @Test
    public void testDefaultTimeZoneNoAnnotation() throws Exception {
        assertEquals(TEST_DEFAULT_TIMEZONE, TimeZone.getDefault());
    }

    @Test
    @SystemDefaults(timezone = "CET")
    public void testUseDifferentTimeZone() throws Exception {
        assertEquals(TimeZone.getTimeZone("CET"), TimeZone.getDefault());
    }

    @AfterClass
    public static void classTearDown() {
        Locale.setDefault(DEFAULT_LOCALE_BEFORE_TEST);
        TimeZone.setDefault(DEFAULT_TIMEZONE_BEFORE_TEST);
    }
}