luni/src/test/java/libcore/java/text/DecimalFormatSymbolsTest.java

/*
 * Copyright (C) 2010 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.java.text;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.text.DecimalFormatSymbols;
import java.util.Locale;

public class DecimalFormatSymbolsTest extends junit.framework.TestCase {
    private void checkLocaleIsEquivalentToRoot(Locale locale) {
        DecimalFormatSymbols dfs = DecimalFormatSymbols.getInstance(locale);
        assertEquals(DecimalFormatSymbols.getInstance(Locale.ROOT), dfs);
    }
    public void test_getInstance_unknown_or_invalid_locale() throws Exception {
        // TODO: we fail these tests because ROOT has "INF" for infinity but 'dfs' has "\u221e".
        // On the RI, ROOT has "\u221e" too, but DecimalFormatSymbols.equals appears to be broken;
        // it returns false for objects that -- if you compare their externally visible state --
        // are equal. It could be that they're accidentally checking the Locale.
        checkLocaleIsEquivalentToRoot(new Locale("xx", "XX"));
        checkLocaleIsEquivalentToRoot(new Locale("not exist language", "not exist country"));
    }

    // http://code.google.com/p/android/issues/detail?id=14495
    public void testSerialization() throws Exception {
        DecimalFormatSymbols originalDfs = DecimalFormatSymbols.getInstance(Locale.GERMANY);

        // Serialize...
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        new ObjectOutputStream(out).writeObject(originalDfs);
        byte[] bytes = out.toByteArray();

        // Deserialize...
        ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes));
        DecimalFormatSymbols deserializedDfs = (DecimalFormatSymbols) in.readObject();
        assertEquals(-1, in.read());

        // The two objects should claim to be equal.
        assertEquals(originalDfs, deserializedDfs);
    }
}