Reland of "Use address_data.h from upstream libaddressinput".

third_party/libaddressinput/chromium/cpp/test/language_test.cc

+// Copyright (C) 2014 Google Inc.
+//
+// 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.
+
+#include "language.h"
+
+#include <string>
+
+#include <gtest/gtest.h>
+
+namespace {
+
+using i18n::addressinput::Language;
+
+struct LanguageTestCase {
+  LanguageTestCase(const std::string& input_language_tag,
+                   const std::string& expected_language_tag,
+                   const std::string& expected_base_language,
+                   bool expected_has_latin_script)
+      : input_language_tag(input_language_tag),
+        expected_language_tag(expected_language_tag),
+        expected_base_language(expected_base_language),
+        expected_has_latin_script(expected_has_latin_script) {}
+
+  ~LanguageTestCase() {}
+
+  const std::string input_language_tag;
+  const std::string expected_language_tag;
+  const std::string expected_base_language;
+  const bool expected_has_latin_script;
+};
+
+class LanguageTest : public testing::TestWithParam<LanguageTestCase> {};
+
+TEST_P(LanguageTest, ExtractedDataIsCorrect) {
+  Language language(GetParam().input_language_tag);
+  EXPECT_EQ(GetParam().expected_language_tag, language.tag);
+  EXPECT_EQ(GetParam().expected_base_language, language.base);
+  EXPECT_EQ(GetParam().expected_has_latin_script, language.has_latin_script);
+}
+
+INSTANTIATE_TEST_CASE_P(
+    LanguageTestCases, LanguageTest,
+    testing::Values(
+        LanguageTestCase("", "", "", false),
+        LanguageTestCase("en", "en", "en", false),
+        LanguageTestCase("zh-Latn-CN", "zh-Latn-CN", "zh", true),
+        LanguageTestCase("zh-cmn-Latn-CN", "zh-cmn-Latn-CN", "zh", true),
+        LanguageTestCase("zh-Hans", "zh-Hans", "zh", false),
+        LanguageTestCase("en_GB", "en-GB", "en", false)));
+
+}  // namespace