Method CheckRoundtripSpaced

cpp/src/parquet/encoding_test.cc:337–357

  }

  void CheckRoundtripSpaced(const uint8_t* valid_bits, int64_t valid_bits_offset) {
    auto encoder =
        MakeTypedEncoder<Type>(Encoding::PLAIN, /*use_dictionary=*/false, descr_.get());
    auto decoder = MakeTypedDecoder<Type>(Encoding::PLAIN, descr_.get());
    int null_count = 0;
    for (auto i = 0; i < num_values_; i++) {
      if (!bit_util::GetBit(valid_bits, valid_bits_offset + i)) {
        null_count++;
      }
    }

    encoder->PutSpaced(draws_, num_values_, valid_bits, valid_bits_offset);
    encode_buffer_ = encoder->FlushValues();
    decoder->SetData(num_values_ - null_count, encode_buffer_->data(),
                     static_cast<int>(encode_buffer_->size()));
    auto values_decoded = decoder->DecodeSpaced(decode_buf_, num_values_, null_count,
                                                valid_bits, valid_bits_offset);
    ASSERT_EQ(num_values_, values_decoded);
    ASSERT_NO_FATAL_FAILURE(VerifyResultsSpaced<c_type>(decode_buf_, draws_, num_values_,
                                                        valid_bits, valid_bits_offset));
  }

 protected:
  USING_BASE_MEMBERS();