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#include "gtest/gtest.h"
#include "google/protobuf/test_messages_proto2.upb.h"
#include "google/protobuf/test_messages_proto3.upb.h"
#include "upb/mini_table/field.h"
#include "upb/mini_table/message.h"
#include "upb/test/test.upb.h"
#include "upb/upb.hpp"

// Must be last.
#include "upb/port/def.inc"

TEST(MiniTableOneofTest, OneOfIteratorProto2) {
  constexpr int oneof_first_field_number = 111;
  constexpr int oneof_test_field_number = 116;

  const upb_MiniTable* google_protobuf_table =
      &protobuf_test_messages_proto2_TestAllTypesProto2_msg_init;
  const upb_MiniTableField* field =
      upb_MiniTable_FindFieldByNumber(google_protobuf_table, oneof_test_field_number);
  ASSERT_TRUE(field != nullptr);
  const upb_MiniTableField* ptr = upb_MiniTable_GetOneof(google_protobuf_table, field);
  int field_num = oneof_first_field_number;
  do {
    EXPECT_EQ(ptr->number, field_num++);
  } while (upb_MiniTable_NextOneofField(google_protobuf_table, &ptr));
}

TEST(MiniTableOneofTest, InitialFieldNotOneOf) {
  constexpr int test_field_number = 1;  // optional int that is not a oneof
  const upb_MiniTable* google_protobuf_table =
      &protobuf_test_messages_proto2_TestAllTypesProto2_msg_init;
  const upb_MiniTableField* field =
      upb_MiniTable_FindFieldByNumber(google_protobuf_table, test_field_number);
  ASSERT_TRUE(field != nullptr);
  const upb_MiniTableField* first_field =
      upb_MiniTable_GetOneof(google_protobuf_table, field);
  EXPECT_EQ(first_field, nullptr);
}