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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/win/embedded_i18n/language_selector.h"
#include <string>
#include <tuple>
#include <vector>
#include "base/test/gtest_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace win {
namespace i18n {
namespace {
constexpr const wchar_t* kExactMatchCandidates[] = {
L"am", L"ar", L"bg", L"bn", L"ca", L"cs", L"da", L"de",
L"el", L"en-gb", L"en-us", L"es", L"es-419", L"et", L"fa", L"fi",
L"fil", L"fr", L"gu", L"hi", L"hr", L"hu", L"id", L"it",
L"iw", L"ja", L"kn", L"ko", L"lt", L"lv", L"ml", L"mr",
L"nl", L"no", L"pl", L"pt-br", L"pt-pt", L"ro", L"ru", L"sk",
L"sl", L"sr", L"sv", L"sw", L"ta", L"te", L"th", L"tr",
L"uk", L"vi", L"zh-cn", L"zh-tw"};
constexpr const wchar_t* kAliasMatchCandidates[] = {
L"he", L"nb", L"tl", L"zh-chs", L"zh-cht",
L"zh-hans", L"zh-hant", L"zh-hk", L"zh-mo"};
constexpr const wchar_t* kWildcardMatchCandidates[] = {L"en-AU", L"es-CO",
L"pt-AB", L"zh-SG"};
std::vector<LanguageSelector::LangToOffset> MakeLanguageOffsetPairs() {
std::vector<LanguageSelector::LangToOffset> language_offset_pairs;
int i = 0;
for (const wchar_t* lang : kExactMatchCandidates) {
language_offset_pairs.emplace_back(lang, i++);
}
return language_offset_pairs;
}
class TestLanguageSelector : public LanguageSelector {
public:
TestLanguageSelector() : TestLanguageSelector(std::vector<std::wstring>()) {}
explicit TestLanguageSelector(const std::vector<std::wstring>& candidates)
: TestLanguageSelector(candidates, MakeLanguageOffsetPairs()) {}
TestLanguageSelector(
const std::vector<std::wstring>& candidates,
span<const LanguageSelector::LangToOffset> languages_to_offset)
: LanguageSelector(candidates, languages_to_offset) {}
};
} // namespace
// Test that a language is selected from the system.
TEST(LanguageSelectorTest, DefaultSelection) {
TestLanguageSelector instance;
EXPECT_FALSE(instance.matched_candidate().empty());
}
// Test some hypothetical candidate sets.
TEST(LanguageSelectorTest, AssortedSelections) {
{
std::vector<std::wstring> candidates = {L"fr-BE", L"fr", L"en"};
TestLanguageSelector instance(candidates);
// Expect the exact match to win.
EXPECT_EQ(L"fr", instance.matched_candidate());
}
{
std::vector<std::wstring> candidates = {L"xx-YY", L"cc-Ssss-RR"};
TestLanguageSelector instance(candidates);
// Expect the fallback to win.
EXPECT_EQ(L"en-us", instance.matched_candidate());
}
{
std::vector<std::wstring> candidates = {L"zh-SG", L"en-GB"};
TestLanguageSelector instance(candidates);
// Expect the alias match to win.
EXPECT_EQ(L"zh-SG", instance.matched_candidate());
}
}
// A fixture for testing sets of single-candidate selections.
class LanguageSelectorMatchCandidateTest
: public ::testing::TestWithParam<const wchar_t*> {};
TEST_P(LanguageSelectorMatchCandidateTest, TestMatchCandidate) {
TestLanguageSelector instance({GetParam()});
EXPECT_EQ(GetParam(), instance.matched_candidate());
}
// Test that all existing translations can be found by exact match.
INSTANTIATE_TEST_SUITE_P(TestExactMatches,
LanguageSelectorMatchCandidateTest,
::testing::ValuesIn(kExactMatchCandidates));
// Test the alias matches.
INSTANTIATE_TEST_SUITE_P(TestAliasMatches,
LanguageSelectorMatchCandidateTest,
::testing::ValuesIn(kAliasMatchCandidates));
// Test a few wildcard matches.
INSTANTIATE_TEST_SUITE_P(TestWildcardMatches,
LanguageSelectorMatchCandidateTest,
::testing::ValuesIn(kWildcardMatchCandidates));
// A fixture for testing aliases that match to an expected translation. The
// first member of the tuple is the expected translation, the second is a
// candidate that should be aliased to the expectation.
class LanguageSelectorAliasTest
: public ::testing::TestWithParam<
std::tuple<const wchar_t*, const wchar_t*>> {};
// Test that the candidate language maps to the aliased translation.
TEST_P(LanguageSelectorAliasTest, AliasesMatch) {
TestLanguageSelector instance({std::get<1>(GetParam())});
EXPECT_EQ(std::get<0>(GetParam()), instance.selected_translation());
}
INSTANTIATE_TEST_SUITE_P(EnGbAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"en-gb"),
::testing::Values(L"en-au",
L"en-ca",
L"en-nz",
L"en-za")));
INSTANTIATE_TEST_SUITE_P(IwAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"iw"),
::testing::Values(L"he")));
INSTANTIATE_TEST_SUITE_P(NoAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"no"),
::testing::Values(L"nb")));
INSTANTIATE_TEST_SUITE_P(FilAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"fil"),
::testing::Values(L"tl")));
INSTANTIATE_TEST_SUITE_P(
ZhCnAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"zh-cn"),
::testing::Values(L"zh-chs", L"zh-hans", L"zh-sg")));
INSTANTIATE_TEST_SUITE_P(ZhTwAliases,
LanguageSelectorAliasTest,
::testing::Combine(::testing::Values(L"zh-tw"),
::testing::Values(L"zh-cht",
L"zh-hant",
L"zh-hk",
L"zh-mo")));
// Test that we can get a match of the default language.
TEST(LanguageSelectorTest, DefaultLanguageName) {
TestLanguageSelector instance;
EXPECT_FALSE(instance.selected_translation().empty());
}
// All languages given to the selector must be lower cased (since generally
// the language names are generated by a python script).
TEST(LanguageSelectorTest, InvalidLanguageCasing) {
constexpr LanguageSelector::LangToOffset kLangToOffset[] = {{L"en-US", 0}};
EXPECT_DCHECK_DEATH(LanguageSelector instance(
std::vector<std::wstring>({L"en-us"}), kLangToOffset));
}
// Language name and offset pairs must be ordered when generated by the
// python script.
TEST(LanguageSelectorTest, InvalidLanguageNameOrder) {
constexpr LanguageSelector::LangToOffset kLangToOffset[] = {{L"en-us", 0},
{L"en-gb", 1}};
EXPECT_DCHECK_DEATH(LanguageSelector instance(
std::vector<std::wstring>({L"en-us"}), kLangToOffset));
}
// There needs to be a fallback language available in the generated
// languages if ever the selector is given a language that does not exist.
TEST(LanguageSelectorTest, NoFallbackLanguageAvailable) {
constexpr LanguageSelector::LangToOffset kLangToOffset[] = {{L"en-gb", 0}};
EXPECT_DCHECK_DEATH(LanguageSelector instance(
std::vector<std::wstring>({L"aa-bb"}), kLangToOffset));
}
// No languages available.
TEST(LanguageSelectorTest, NoLanguagesAvailable) {
EXPECT_DCHECK_DEATH(
LanguageSelector instance(std::vector<std::wstring>({L"en-us"}), {}));
}
} // namespace i18n
} // namespace win
} // namespace base
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