// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google LLC nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <stdlib.h>

#include <gtest/gtest.h>
#include "upb/base/string_view.h"
#include "upb/mem/arena.h"
#include "upb/mem/arena.hpp"
#include "upb/message/utf8_test.upb.h"
#include "upb/message/utf8_test.upb_minitable.h"
#include "upb/wire/decode.h"

namespace {

const char bad_utf8[] = "\xff";

static char* GetBadUtf8Payload(upb_Arena* arena, size_t* size) {
  upb_test_TestUtf8Bytes* msg = upb_test_TestUtf8Bytes_new(arena);
  upb_test_TestUtf8Bytes_set_data(msg, upb_StringView_FromString(bad_utf8));
  char* data = upb_test_TestUtf8Bytes_serialize(msg, arena, size);
  EXPECT_TRUE(data != nullptr);
  return data;
}

TEST(Utf8Test, BytesFieldDoesntValidate) {
  upb::Arena arena;
  size_t size;
  char* data = GetBadUtf8Payload(arena.ptr(), &size);
  upb_test_TestUtf8Bytes* msg2 =
      upb_test_TestUtf8Bytes_parse(data, size, arena.ptr());

  // Parse succeeds, because the bytes field does not validate UTF-8.
  ASSERT_TRUE(msg2 != nullptr);
}

TEST(Utf8Test, Proto3FieldValidates) {
  upb::Arena arena;
  size_t size;
  char* data = GetBadUtf8Payload(arena.ptr(), &size);

  upb_test_TestUtf8Proto3String* msg =
      upb_test_TestUtf8Proto3String_new(arena.ptr());

  upb_DecodeStatus status =
      upb_Decode(data, size, msg, &upb_0test__TestUtf8Proto3String_msg_init,
                 nullptr, 0, arena.ptr());

  // Parse fails, because proto3 string fields validate UTF-8.
  ASSERT_EQ(kUpb_DecodeStatus_BadUtf8, status);
}

TEST(Utf8Test, RepeatedProto3FieldValidates) {
  upb::Arena arena;
  size_t size;
  char* data = GetBadUtf8Payload(arena.ptr(), &size);

  upb_test_TestUtf8RepeatedProto3String* msg =
      upb_test_TestUtf8RepeatedProto3String_new(arena.ptr());

  upb_DecodeStatus status = upb_Decode(
      data, size, msg, &upb_0test__TestUtf8RepeatedProto3String_msg_init,
      nullptr, 0, arena.ptr());

  // Parse fails, because proto3 string fields validate UTF-8.
  ASSERT_EQ(kUpb_DecodeStatus_BadUtf8, status);
}

// begin:google_only
// TEST(Utf8Test, Proto3MixedFieldValidates) {
//   upb::Arena arena;
//   size_t size;
//   char* data = GetBadUtf8Payload(arena.ptr(), &size);
//
//   upb_test_TestUtf8Proto3StringMixed* msg =
//       upb_test_TestUtf8Proto3StringMixed_new(arena.ptr());
//
//   upb_DecodeStatus status = upb_Decode(
//       data, size, msg, &upb_0test__TestUtf8Proto3StringMixed_msg_init, nullptr,
//       0, arena.ptr());
//
//   // Parse fails, because proto3 string fields validate UTF-8.
//   ASSERT_EQ(kUpb_DecodeStatus_BadUtf8, status);
// }
//
// TEST(Utf8Test, EnforceUtf8Options) {
//   upb::Arena arena;
//   size_t size;
//   char* data = GetBadUtf8Payload(arena.ptr(), &size);
//   upb_test_TestUtf8Proto3StringEnforceUtf8False* msg2 =
//       upb_test_TestUtf8Proto3StringEnforceUtf8False_parse(data, size,
//                                                           arena.ptr());
//
//   // Parse succeeds, because enforce_utf8=false inhibits utf-8 validation.
//   ASSERT_TRUE(msg2 != nullptr);
// }
//
// TEST(Utf8Test, RepeatedEnforceUtf8Options) {
//   upb::Arena arena;
//   size_t size;
//   char* data = GetBadUtf8Payload(arena.ptr(), &size);
//   upb_test_TestUtf8RepeatedProto3StringEnforceUtf8False* msg2 =
//       upb_test_TestUtf8RepeatedProto3StringEnforceUtf8False_parse(data, size,
//                                                                   arena.ptr());
//
//   // Parse succeeds, because enforce_utf8=false inhibits utf-8 validation.
//   ASSERT_TRUE(msg2 != nullptr);
// }
//
// TEST(Utf8Test, EnforceUtf8OptionsMixed) {
//   upb::Arena arena;
//   size_t size;
//   char* data = GetBadUtf8Payload(arena.ptr(), &size);
//   upb_test_TestUtf8Proto3StringEnforceUtf8FalseMixed* msg2 =
//       upb_test_TestUtf8Proto3StringEnforceUtf8FalseMixed_parse(data, size,
//                                                                arena.ptr());
//
//   // Parse succeeds, because enforce_utf8=false inhibits utf-8 validation.
//   ASSERT_TRUE(msg2 != nullptr);
// }
// end:google_only

}  // namespace