main/tests/core/src/com/ibm/icu/dev/test/util/LocaleMatcherTest.java

/*
 ******************************************************************************************
 * Copyright (C) 2009-2010, Google, Inc.; International Business Machines Corporation and *
 * others. All Rights Reserved.                                                           *
 ******************************************************************************************
 */

package com.ibm.icu.dev.test.util;

import com.ibm.icu.dev.test.TestFmwk;
import com.ibm.icu.util.LocaleMatcher;
import com.ibm.icu.util.LocaleMatcher.LanguageMatcherData;
import com.ibm.icu.util.LocalePriorityList;
import com.ibm.icu.util.ULocale;

/**
 * Test the LanguageMatcher.
 * 
 * @author markdavis
 */
public class LocaleMatcherTest extends TestFmwk {

    public static void main(String[] args) throws Exception {
        new LocaleMatcherTest().run(args);
    }

    public void testBasics() {
        final LocaleMatcher matcher = new LocaleMatcher(LocalePriorityList.add(ULocale.FRENCH).add(ULocale.UK)
                .add(ULocale.ENGLISH).build());
        logln(matcher.toString());

        assertEquals(ULocale.UK, matcher.getBestMatch(ULocale.UK));
        assertEquals(ULocale.ENGLISH, matcher.getBestMatch(ULocale.US));
        assertEquals(ULocale.FRENCH, matcher.getBestMatch(ULocale.FRANCE));
        assertEquals(ULocale.FRENCH, matcher.getBestMatch(ULocale.JAPAN));
    }

    public void testFallback() {
        // check that script fallbacks are handled right
        final LocaleMatcher matcher = new LocaleMatcher("zh_CN, zh_TW, iw");
        assertEquals(new ULocale("zh_TW"), matcher.getBestMatch("zh_Hant"));
        assertEquals(new ULocale("zh_CN"), matcher.getBestMatch("zh"));
        assertEquals(new ULocale("zh_CN"), matcher.getBestMatch("zh_Hans_CN"));
        assertEquals(new ULocale("zh_TW"), matcher.getBestMatch("zh_Hant_HK"));
        assertEquals(new ULocale("he"), matcher.getBestMatch("iw_IT"));
    }

    public void testSpecials() {
        // check that nearby languages are handled
        final LocaleMatcher matcher = new LocaleMatcher("en, fil, ro, nn");
        assertEquals(new ULocale("fil"), matcher.getBestMatch("tl"));
        assertEquals(new ULocale("ro"), matcher.getBestMatch("mo"));
        assertEquals(new ULocale("nn"), matcher.getBestMatch("nb"));
        // make sure default works
        assertEquals(new ULocale("en"), matcher.getBestMatch("ja"));
    }

    public void testRegionalSpecials() {
        // verify that en_AU is closer to en_GB than to en (which is en_US)
        final LocaleMatcher matcher = new LocaleMatcher("en, en_GB, es, es_419");
        assertEquals("en_AU in {en, en_GB, es, es_419}", new ULocale("en_GB"), matcher.getBestMatch("en_AU"));
        assertEquals("es_MX in {en, en_GB, es, es_419}", new ULocale("es_419"), matcher.getBestMatch("es_MX"));
        assertEquals("es_ES in {en, en_GB, es, es_419}", new ULocale("es"), matcher.getBestMatch("es_ES"));
    }

    public void TestLocaleMatcherCoverage() {
        // Add tests for better code coverage
        LocaleMatcher matcher = new LocaleMatcher(LocalePriorityList.add(null, 0).build(), null);
        logln(matcher.toString());

        LanguageMatcherData data = new LanguageMatcherData();

        LanguageMatcherData clone = data.cloneAsThawed();

        if (clone.equals(data)) {
            errln("Error cloneAsThawed() is equal.");
        }

        if (data.isFrozen()) {
            errln("Error LanguageMatcherData is frozen!");
        }
    }

    private void assertEquals(Object expected, Object string) {
        assertEquals("", expected, string);
    }

}