#include "required_table_default_test.h"

#include "required_table_default_test_generated.h"
#include "test_assert.h"

namespace flatbuffers {
namespace tests {

// Exercises the (required) table-field default member initializer added to
// GenMember() in idl_gen_cpp.cpp: a `(required)` table field can never
// legally be missing once Pack()/Verify() succeed, so a plain native default
// constructor must not leave it null - callers should never have to
// remember to allocate it themselves before the first Pack(). The sibling
// `optional_inner` field (same type, no `required`) is checked alongside it
// to confirm the change is scoped to required fields only.
void RequiredTableDefaultTest() {
  using RequiredTableDefaultTestNS::Holder;
  using RequiredTableDefaultTestNS::HolderT;

  HolderT src;
  TEST_NOTNULL(src.required_inner.get());
  TEST_NULL(src.optional_inner.get());

  // Never manually allocated required_inner - only relying on the default
  // constructor above - yet Pack() must still succeed and round-trip it.
  src.required_inner->value = 42;

  flatbuffers::FlatBufferBuilder fbb;
  fbb.Finish(Holder::Pack(fbb, &src));

  auto dst = RequiredTableDefaultTestNS::UnPackHolder(fbb.GetBufferPointer());

  TEST_NOTNULL(dst->required_inner.get());
  TEST_EQ(dst->required_inner->value, 42u);
  TEST_NULL(dst->optional_inner.get());
}

}  // namespace tests
}  // namespace flatbuffers