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#
#   http://www.apache.org/licenses/LICENSE-2.0
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class TestParquetArrowFileWriter < Test::Unit::TestCase
  include Helper::Buildable

  def setup
    omit("Parquet is required") unless defined?(::Parquet)
    Tempfile.create(["data", ".parquet"]) do |file|
      @file = file
      yield
    end
  end

  def test_schema
    schema = build_schema("enabled" => :boolean)
    writer = Parquet::ArrowFileWriter.new(schema, @file.path)
    assert_equal(schema, writer.schema)
    writer.close
  end

  def test_write_record_batch
    enabled_values = [true, nil, false, true]
    record_batch =
      build_record_batch("enabled" => build_boolean_array(enabled_values))

    writer = Parquet::ArrowFileWriter.new(record_batch.schema, @file.path)
    writer.write_record_batch(record_batch)
    writer.new_buffered_row_group
    writer.write_record_batch(record_batch)
    writer.close

    reader = Parquet::ArrowFileReader.new(@file.path)
    begin
      reader.use_threads = true
      assert_equal([
                     2,
                     Arrow::Table.new(record_batch.schema,
                                      [record_batch, record_batch]),
                   ],
                   [
                     reader.n_row_groups,
                     reader.read_table,
                   ])
    ensure
      reader.unref
    end
  end

  def test_write_table
    enabled_values = [true, nil, false, true]
    table = build_table("enabled" => build_boolean_array(enabled_values))
    chunk_size = 2

    writer = Parquet::ArrowFileWriter.new(table.schema, @file.path)
    writer.write_table(table, chunk_size)
    writer.close

    reader = Parquet::ArrowFileReader.new(@file.path)
    begin
      reader.use_threads = true
      assert_equal([
                     enabled_values.length / chunk_size,
                     table,
                   ],
                   [
                     reader.n_row_groups,
                     reader.read_table,
                   ])
    ensure
      reader.unref
    end
  end

  def test_write_chunked_array
    schema = build_schema("enabled" => :boolean)
    writer = Parquet::ArrowFileWriter.new(schema, @file.path)
    writer.new_row_group(2)
    chunked_array = Arrow::ChunkedArray.new([build_boolean_array([true, nil])])
    writer.write_chunked_array(chunked_array)
    writer.new_row_group(1)
    chunked_array = Arrow::ChunkedArray.new([build_boolean_array([false])])
    writer.write_chunked_array(chunked_array)
    writer.close

    reader = Parquet::ArrowFileReader.new(@file.path)
    begin
      reader.use_threads = true
      assert_equal([
                     2,
                     build_table("enabled" => [
                                   build_boolean_array([true, nil]),
                                   build_boolean_array([false]),
                                 ]),
                   ],
                   [
                     reader.n_row_groups,
                     reader.read_table,
                   ])
    ensure
      reader.unref
    end
  end
end
