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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.
*/
package libcore.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.util.TimeZone;
public class ZoneInfoDBTest extends junit.framework.TestCase {
private static final String CURRENT_VERSION = ZoneInfoDB.getInstance().getVersion();
// Any new file in /data...
private static final String TZDATA_IN_DATA = System.getenv("ANDROID_DATA") + "/misc/zoneinfo/tzdata";
// ...overrides any existing file in /system.
private static final String TZDATA_IN_ROOT = System.getenv("ANDROID_ROOT") + "/usr/share/zoneinfo/tzdata";
// An empty override file should fall back to the default file.
public void testEmptyOverrideFile() throws Exception {
ZoneInfoDB.TzData data = new ZoneInfoDB.TzData(makeEmptyFile(), TZDATA_IN_DATA, TZDATA_IN_ROOT);
assertEquals(CURRENT_VERSION, data.getVersion());
assertEquals(TimeZone.getAvailableIDs().length, data.getAvailableIDs().length);
}
// A corrupt override file should fall back to the default file.
public void testCorruptOverrideFile() throws Exception {
ZoneInfoDB.TzData data = new ZoneInfoDB.TzData(makeCorruptFile(), TZDATA_IN_DATA, TZDATA_IN_ROOT);
assertEquals(CURRENT_VERSION, data.getVersion());
assertEquals(TimeZone.getAvailableIDs().length, data.getAvailableIDs().length);
}
// Given no tzdata files we can use, we should fall back to built-in "GMT".
public void testNoGoodFile() throws Exception {
ZoneInfoDB.TzData data = new ZoneInfoDB.TzData(makeEmptyFile());
assertEquals("missing", data.getVersion());
assertEquals(1, data.getAvailableIDs().length);
assertEquals("GMT", data.getAvailableIDs()[0]);
}
// Given a valid override file, we should find ourselves using that.
public void testGoodOverrideFile() throws Exception {
// We copy /system/usr/share/zoneinfo/tzdata because we know that always exists.
RandomAccessFile in = new RandomAccessFile(TZDATA_IN_ROOT, "r");
byte[] content = new byte[(int) in.length()];
in.readFully(content);
// Bump the version number to one long past where humans will be extinct.
content[6] = '9';
content[7] = '9';
content[8] = '9';
content[9] = '9';
content[10] = 'z';
in.close();
String goodFile = makeTemporaryFile(content);
try {
ZoneInfoDB.TzData data = new ZoneInfoDB.TzData(goodFile, TZDATA_IN_DATA, TZDATA_IN_ROOT);
assertEquals("9999z", data.getVersion());
assertEquals(TimeZone.getAvailableIDs().length, data.getAvailableIDs().length);
} finally {
new File(goodFile).delete();
}
}
private static String makeCorruptFile() throws Exception {
return makeTemporaryFile("invalid content".getBytes());
}
private static String makeEmptyFile() throws Exception {
return makeTemporaryFile(new byte[0]);
}
private static String makeTemporaryFile(byte[] content) throws Exception {
File f = File.createTempFile("temp-", ".txt");
FileOutputStream fos = new FileOutputStream(f);
fos.write(content);
fos.close();
return f.getPath();
}
}
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