Method Check

cpp/src/arrow/array/array_test.cc:1285–1314

  }

  void Check(const std::unique_ptr<BuilderType>& builder, bool nullable) {
    int64_t size = builder->length();
    auto ex_data = Buffer::Wrap(draws_.data(), size);

    std::shared_ptr<Buffer> ex_null_bitmap;
    int64_t ex_null_count = 0;

    if (nullable) {
      ASSERT_OK_AND_ASSIGN(ex_null_bitmap, internal::BytesToBits(valid_bytes_));
      ex_null_count = CountNulls(valid_bytes_);
    } else {
      ex_null_bitmap = nullptr;
    }

    auto expected =
        std::make_shared<ArrayType>(size, ex_data, ex_null_bitmap, ex_null_count);

    std::shared_ptr<Array> out;
    FinishAndCheckPadding(builder.get(), &out);

    std::shared_ptr<ArrayType> result = checked_pointer_cast<ArrayType>(out);

    // Builder is now reset
    ASSERT_EQ(0, builder->length());
    ASSERT_EQ(0, builder->capacity());
    ASSERT_EQ(0, builder->null_count());

    ASSERT_EQ(ex_null_count, result->null_count());
    ASSERT_TRUE(result->Equals(*expected));
  }

  void FlipValue(CType* ptr) {
    auto byteptr = reinterpret_cast<uint8_t*>(ptr);