// Protocol Buffers - Google's data interchange format
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// Author: kenton@google.com (Kenton Varda)

#include "google/protobuf/stubs/strutil.h"

#include <gtest/gtest.h>
#include <locale.h>

#include "google/protobuf/testing/googletest.h"

#ifdef _WIN32
#define snprintf _snprintf
#endif

namespace google {
namespace protobuf {
namespace {

// TODO(kenton):  Copy strutil tests from google3?

TEST(StringUtilityTest, ImmuneToLocales) {
  // Remember the old locale.
  char* old_locale_cstr = setlocale(LC_NUMERIC, nullptr);
  ASSERT_TRUE(old_locale_cstr != nullptr);
  std::string old_locale = old_locale_cstr;

  // Set the locale to "C".
  ASSERT_TRUE(setlocale(LC_NUMERIC, "C") != nullptr);

  EXPECT_EQ("1.5", SimpleDtoa(1.5));
  EXPECT_EQ("1.5", SimpleFtoa(1.5));

  if (setlocale(LC_NUMERIC, "es_ES") == nullptr &&
      setlocale(LC_NUMERIC, "es_ES.utf8") == nullptr) {
    // Some systems may not have the desired locale available.
    GOOGLE_LOG(WARNING)
      << "Couldn't set locale to es_ES.  Skipping this test.";
  } else {
    EXPECT_EQ("1.5", SimpleDtoa(1.5));
    EXPECT_EQ("1.5", SimpleFtoa(1.5));
  }

  // Return to original locale.
  setlocale(LC_NUMERIC, old_locale.c_str());
}

}  // anonymous namespace
}  // namespace protobuf
}  // namespace google