text: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  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 Inc. 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 <memory>
  #include <string>
  #include <vector>
  
  #include <google/protobuf/test_util.h>
  #include <google/protobuf/unittest.pb.h>
  #include <google/protobuf/unittest_proto3_arena.pb.h>
  #include <google/protobuf/arena.h>
  #include <google/protobuf/testing/googletest.h>
  #include <gtest/gtest.h>
  
  using proto3_arena_unittest::TestAllTypes;
  
  namespace google {
  namespace protobuf {
  namespace {
  // We selectively set/check a few representative fields rather than all fields
  // as this test is only expected to cover the basics of arena support.
  void SetAllFields(TestAllTypes* m) {
    m->set_optional_int32(100);
    m->set_optional_string("asdf");
    m->set_optional_bytes("jkl;");
    m->mutable_optional_nested_message()->set_bb(42);
    m->mutable_optional_foreign_message()->set_c(43);
    m->set_optional_nested_enum(
        proto3_arena_unittest::TestAllTypes_NestedEnum_BAZ);
    m->set_optional_foreign_enum(proto3_arena_unittest::FOREIGN_BAZ);
    m->mutable_optional_lazy_message()->set_bb(45);
    m->add_repeated_int32(100);
    m->add_repeated_string("asdf");
    m->add_repeated_bytes("jkl;");
    m->add_repeated_nested_message()->set_bb(46);
    m->add_repeated_foreign_message()->set_c(47);
    m->add_repeated_nested_enum(
        proto3_arena_unittest::TestAllTypes_NestedEnum_BAZ);
    m->add_repeated_foreign_enum(proto3_arena_unittest::FOREIGN_BAZ);
    m->add_repeated_lazy_message()->set_bb(49);
  
    m->set_oneof_uint32(1);
    m->mutable_oneof_nested_message()->set_bb(50);
    m->set_oneof_string("test");  // only this one remains set
  }
  
  void ExpectAllFieldsSet(const TestAllTypes& m) {
    EXPECT_EQ(100, m.optional_int32());
    EXPECT_EQ("asdf", m.optional_string());
    EXPECT_EQ("jkl;", m.optional_bytes());
    EXPECT_EQ(true, m.has_optional_nested_message());
    EXPECT_EQ(42, m.optional_nested_message().bb());
    EXPECT_EQ(true, m.has_optional_foreign_message());
    EXPECT_EQ(43, m.optional_foreign_message().c());
    EXPECT_EQ(proto3_arena_unittest::TestAllTypes_NestedEnum_BAZ,
              m.optional_nested_enum());
    EXPECT_EQ(proto3_arena_unittest::FOREIGN_BAZ, m.optional_foreign_enum());
    EXPECT_EQ(true, m.has_optional_lazy_message());
    EXPECT_EQ(45, m.optional_lazy_message().bb());
  
    EXPECT_EQ(1, m.repeated_int32_size());
    EXPECT_EQ(100, m.repeated_int32(0));
    EXPECT_EQ(1, m.repeated_string_size());
    EXPECT_EQ("asdf", m.repeated_string(0));
    EXPECT_EQ(1, m.repeated_bytes_size());
    EXPECT_EQ("jkl;", m.repeated_bytes(0));
    EXPECT_EQ(1, m.repeated_nested_message_size());
    EXPECT_EQ(46, m.repeated_nested_message(0).bb());
    EXPECT_EQ(1, m.repeated_foreign_message_size());
    EXPECT_EQ(47, m.repeated_foreign_message(0).c());
    EXPECT_EQ(1, m.repeated_nested_enum_size());
    EXPECT_EQ(proto3_arena_unittest::TestAllTypes_NestedEnum_BAZ,
              m.repeated_nested_enum(0));
    EXPECT_EQ(1, m.repeated_foreign_enum_size());
    EXPECT_EQ(proto3_arena_unittest::FOREIGN_BAZ, m.repeated_foreign_enum(0));
    EXPECT_EQ(1, m.repeated_lazy_message_size());
    EXPECT_EQ(49, m.repeated_lazy_message(0).bb());
  
    EXPECT_EQ(proto3_arena_unittest::TestAllTypes::kOneofString,
              m.oneof_field_case());
    EXPECT_EQ("test", m.oneof_string());
  }
  
  // In this file we only test some basic functionalities of arena support in
  // proto3 and expect the arena support to be fully tested in proto2 unittests
  // because proto3 shares most code with proto2.
  
  TEST(Proto3ArenaTest, Parsing) {
    TestAllTypes original;
    SetAllFields(&original);
  
    Arena arena;
    TestAllTypes* arena_message = Arena::CreateMessage<TestAllTypes>(&arena);
    arena_message->ParseFromString(original.SerializeAsString());
    ExpectAllFieldsSet(*arena_message);
  }
  
  TEST(Proto3ArenaTest, UnknownFields) {
    TestAllTypes original;
    SetAllFields(&original);
  
    Arena arena;
    TestAllTypes* arena_message = Arena::CreateMessage<TestAllTypes>(&arena);
    arena_message->ParseFromString(original.SerializeAsString());
    ExpectAllFieldsSet(*arena_message);
  
    // In proto3 we can still get a pointer to the UnknownFieldSet through
    // reflection API.
    UnknownFieldSet* unknown_fields =
        arena_message->GetReflection()->MutableUnknownFields(arena_message);
    // We can modify this UnknownFieldSet.
    unknown_fields->AddVarint(1, 2);
    // And the unknown fields should be changed.
    ASSERT_NE(original.ByteSize(), arena_message->ByteSize());
    ASSERT_FALSE(
        arena_message->GetReflection()->GetUnknownFields(*arena_message).empty());
  }
  
  TEST(Proto3ArenaTest, Swap) {
    Arena arena1;
    Arena arena2;
  
    // Test Swap().
    TestAllTypes* arena1_message = Arena::CreateMessage<TestAllTypes>(&arena1);
    TestAllTypes* arena2_message = Arena::CreateMessage<TestAllTypes>(&arena2);
    arena1_message->Swap(arena2_message);
    EXPECT_EQ(&arena1, arena1_message->GetArena());
    EXPECT_EQ(&arena2, arena2_message->GetArena());
  }
  
  TEST(Proto3ArenaTest, SetAllocatedMessage) {
    Arena arena;
    TestAllTypes* arena_message = Arena::CreateMessage<TestAllTypes>(&arena);
    TestAllTypes::NestedMessage* nested = new TestAllTypes::NestedMessage;
    nested->set_bb(118);
    arena_message->set_allocated_optional_nested_message(nested);
    EXPECT_EQ(118, arena_message->optional_nested_message().bb());
  }
  
  TEST(Proto3ArenaTest, ReleaseMessage) {
    Arena arena;
    TestAllTypes* arena_message = Arena::CreateMessage<TestAllTypes>(&arena);
    arena_message->mutable_optional_nested_message()->set_bb(118);
    std::unique_ptr<TestAllTypes::NestedMessage> nested(
        arena_message->release_optional_nested_message());
    EXPECT_EQ(118, nested->bb());
  }
  
  TEST(Proto3ArenaTest, MessageFieldClear) {
    // GitHub issue #310: https://github.com/protocolbuffers/protobuf/issues/310
    Arena arena;
    TestAllTypes* arena_message = Arena::CreateMessage<TestAllTypes>(&arena);
    arena_message->mutable_optional_nested_message()->set_bb(118);
    // This should not crash, but prior to the bugfix, it tried to use `operator
    // delete` the nested message (which is on the arena):
    arena_message->Clear();
  }
  
  TEST(Proto3ArenaTest, MessageFieldClearViaReflection) {
    Arena arena;
    TestAllTypes* message = Arena::CreateMessage<TestAllTypes>(&arena);
    const Reflection* r = message->GetReflection();
    const Descriptor* d = message->GetDescriptor();
    const FieldDescriptor* msg_field =
        d->FindFieldByName("optional_nested_message");
  
    message->mutable_optional_nested_message()->set_bb(1);
    r->ClearField(message, msg_field);
    EXPECT_FALSE(message->has_optional_nested_message());
    EXPECT_EQ(0, message->optional_nested_message().bb());
  }
  
  }  // namespace
  }  // namespace protobuf
  }  // namespace google
  