third_party/WebKit/Source/platform/LayoutLocaleTest.cpp

// 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.

#include "platform/LayoutLocale.h"

#include "platform/Logging.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace blink {

TEST(LayoutLocaleTest, Get)
{
    LayoutLocale::clearForTesting();

    EXPECT_EQ(nullptr, LayoutLocale::get(nullAtom));

    EXPECT_EQ(emptyAtom, LayoutLocale::get(emptyAtom)->localeString());

    EXPECT_STRCASEEQ("en-us", LayoutLocale::get("en-us")->localeString().ascii().data());
    EXPECT_STRCASEEQ("ja-jp", LayoutLocale::get("ja-jp")->localeString().ascii().data());

    LayoutLocale::clearForTesting();
}

TEST(LayoutLocaleTest, GetCaseInsensitive)
{
    const LayoutLocale* enUS = LayoutLocale::get("en-us");
    EXPECT_EQ(enUS, LayoutLocale::get("en-US"));
}

TEST(LayoutLocaleTest, ScriptTest)
{
    // Test combinations of BCP 47 locales.
    // https://tools.ietf.org/html/bcp47
    struct {
        const char* locale;
        UScriptCode script;
        bool hasScriptForHan;
        UScriptCode scriptForHan;
    } tests[] = {
        { "en-US", USCRIPT_LATIN },

        // Common lang-region in East Asia.
        { "ja-JP", USCRIPT_KATAKANA_OR_HIRAGANA, true },
        { "ko-KR", USCRIPT_HANGUL, true },
        { "zh", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-CN", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-HK", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-MO", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-SG", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-TW", USCRIPT_TRADITIONAL_HAN, true },

        // Encompassed languages within the Chinese macrolanguage.
        // Both "lang" and "lang-extlang" should work.
        { "nan", USCRIPT_TRADITIONAL_HAN, true },
        { "wuu", USCRIPT_SIMPLIFIED_HAN, true },
        { "yue", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-nan", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-wuu", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-yue", USCRIPT_TRADITIONAL_HAN, true },

        // Script has priority over other subtags.
        { "zh-Hant", USCRIPT_TRADITIONAL_HAN, true },
        { "en-Hans", USCRIPT_SIMPLIFIED_HAN, true },
        { "en-Hant", USCRIPT_TRADITIONAL_HAN, true },
        { "en-Hans-TW", USCRIPT_SIMPLIFIED_HAN, true },
        { "en-Hant-CN", USCRIPT_TRADITIONAL_HAN, true },
        { "wuu-Hant", USCRIPT_TRADITIONAL_HAN, true },
        { "yue-Hans", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-wuu-Hant", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-yue-Hans", USCRIPT_SIMPLIFIED_HAN, true },

        // Lang has priority over region.
        // icu::Locale::getDefault() returns other combinations if, for instnace,
        // English Windows with the display language set to Japanese.
        { "ja", USCRIPT_KATAKANA_OR_HIRAGANA, true },
        { "ja-US", USCRIPT_KATAKANA_OR_HIRAGANA, true },
        { "ko", USCRIPT_HANGUL, true },
        { "ko-US", USCRIPT_HANGUL, true },
        { "wuu-TW", USCRIPT_SIMPLIFIED_HAN, true },
        { "yue-CN", USCRIPT_TRADITIONAL_HAN, true },
        { "zh-wuu-TW", USCRIPT_SIMPLIFIED_HAN, true },
        { "zh-yue-CN", USCRIPT_TRADITIONAL_HAN, true },

        // Region should not affect script, but it can influence scriptForHan.
        { "en-CN", USCRIPT_LATIN, false },
        { "en-HK", USCRIPT_LATIN, true, USCRIPT_TRADITIONAL_HAN },
        { "en-MO", USCRIPT_LATIN, true, USCRIPT_TRADITIONAL_HAN },
        { "en-SG", USCRIPT_LATIN, false },
        { "en-TW", USCRIPT_LATIN, true, USCRIPT_TRADITIONAL_HAN },
        { "en-JP", USCRIPT_LATIN, true, USCRIPT_KATAKANA_OR_HIRAGANA },
        { "en-KR", USCRIPT_LATIN, true, USCRIPT_HANGUL },

        // Multiple regions are invalid, but it can still give hints for the font selection.
        { "en-US-JP", USCRIPT_LATIN, true, USCRIPT_KATAKANA_OR_HIRAGANA },
    };

    for (const auto& test : tests) {
        RefPtr<LayoutLocale> locale = LayoutLocale::createForTesting(test.locale);
        EXPECT_EQ(test.script, locale->script()) << test.locale;
        EXPECT_EQ(test.hasScriptForHan, locale->hasScriptForHan()) << test.locale;
        if (!test.hasScriptForHan)
            EXPECT_EQ(USCRIPT_SIMPLIFIED_HAN, locale->scriptForHan()) << test.locale;
        else if (test.scriptForHan)
            EXPECT_EQ(test.scriptForHan, locale->scriptForHan()) << test.locale;
        else
            EXPECT_EQ(test.script, locale->scriptForHan()) << test.locale;
    }
}

} // namespace blink