Use BCP47 compliant format for locale representation

base/android/junit/src/org/chromium/base/LocaleUtilsTest.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.base;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+
+import org.chromium.testing.local.LocalRobolectricTestRunner;
+
+import java.util.Locale;
+
+/** Unit tests for the LocaleUtils class. */
+@RunWith(LocalRobolectricTestRunner.class)
+@Config(manifest = Config.NONE)
+public class LocaleUtilsTest {
+    // TODO(yirui): update tests for LocaleList once SDK Roll is completed.
+
+    // This is also a part of test for toLanguageTag when API level is equal or higher than 24
+    @Test
+    public void testGetUpdatedLanguageForChromium() {
+        String language = "en";
+        String updatedLanguage = LocaleUtils.getUpdatedLanguageForChromium(language);
+        Assert.assertEquals(language, updatedLanguage);
+
+        language = "iw";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForChromium(language);
+        Assert.assertEquals("he", updatedLanguage);
+
+        language = "ji";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForChromium(language);
+        Assert.assertEquals("yi", updatedLanguage);
+
+        language = "in";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForChromium(language);
+        Assert.assertEquals("id", updatedLanguage);
+
+        language = "tl";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForChromium(language);
+        Assert.assertEquals("fil", updatedLanguage);
+    }
+
+    // This is also a part of test for forLanguageTag when API level is equal or higher than 21
+    @Test
+    public void testGetUpdatedLanguageForAndroid() {
+        String language = "en";
+        String updatedLanguage = LocaleUtils.getUpdatedLanguageForAndroid(language);
+        Assert.assertEquals(language, updatedLanguage);
+
+        language = "und";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForAndroid(language);
+        Assert.assertEquals("", updatedLanguage);
+
+        language = "fil";
+        updatedLanguage = LocaleUtils.getUpdatedLanguageForAndroid(language);
+        Assert.assertEquals("tl", updatedLanguage);
+    }
+
+    // Test for toLanguageTag when API level is lower than 24
+    @Test
+    public void testToLanguageTagCompat() {
+        Locale locale = new Locale("en", "US");
+        String localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("en-US", localeString);
+
+        locale = new Locale("jp");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("jp", localeString);
+
+        locale = new Locale("mas");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("mas", localeString);
+
+        locale = new Locale("es", "005");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("es-005", localeString);
+
+        locale = new Locale("iw");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("he", localeString);
+
+        locale = new Locale("ji");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("yi", localeString);
+
+        locale = new Locale("in", "ID");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("id-ID", localeString);
+
+        locale = new Locale("tl", "PH");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("fil-PH", localeString);
+
+        locale = new Locale("no", "NO", "NY");
+        localeString = LocaleUtils.toLanguageTagCompat(locale);
+        Assert.assertEquals("nn-NO", localeString);
+    }
+
+    // Test for forLanguageTag when API level is lower than 21
+    @Test
+    public void testForLanguageTagCompat() {
+        String languageTag = "";
+        Locale locale = new Locale("");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "und";
+        locale = new Locale("");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "en";
+        locale = new Locale("en");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "mas";
+        locale = new Locale("mas");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "en-GB";
+        locale = new Locale("en", "GB");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "es-419";
+        locale = new Locale("es", "419");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        // Tests if updated Chromium language code and deprecated language code
+        // are pointing to the same Locale Object.
+        languageTag = "he";
+        locale = new Locale("iw");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "iw";
+        locale = new Locale("he");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "ji";
+        locale = new Locale("yi");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "yi";
+        locale = new Locale("ji");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "in";
+        locale = new Locale("id");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "id";
+        locale = new Locale("in");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        // Tests for Tagalog/Filipino if updated Chromium language code and
+        // language code are pointing to the same Locale Object.
+        languageTag = "tl";
+        locale = new Locale("tl");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "fil";
+        locale = new Locale("tl");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        // Test with invalid inputs.
+        languageTag = "notValidLanguage";
+        locale = new Locale("");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "en-notValidCountry";
+        locale = new Locale("en");
+        Assert.assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+    }
+}