ceph/src/arrow/c_glib/test/test-stream-writer.rb

   1 # Licensed to the Apache Software Foundation (ASF) under one
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   5 # to you under the Apache License, Version 2.0 (the
   6 # "License"); you may not use this file except in compliance
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   9 #   http://www.apache.org/licenses/LICENSE-2.0
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  11 # Unless required by applicable law or agreed to in writing,
  12 # software distributed under the License is distributed on an
  13 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  14 # KIND, either express or implied.  See the License for the
  15 # specific language governing permissions and limitations
  16 # under the License.
  17
  18 class TestStreamWriter < Test::Unit::TestCase
  19   include Helper::Buildable
  20
  21   def test_write_record_batch
  22     data = [true]
  23     field = Arrow::Field.new("enabled", Arrow::BooleanDataType.new)
  24     schema = Arrow::Schema.new([field])
  25
  26     tempfile = Tempfile.open("arrow-ipc-stream-writer")
  27     output = Arrow::FileOutputStream.new(tempfile.path, false)
  28     begin
  29       stream_writer = Arrow::RecordBatchStreamWriter.new(output, schema)
  30       begin
  31         columns = [
  32           build_boolean_array(data),
  33         ]
  34         record_batch = Arrow::RecordBatch.new(schema, data.size, columns)
  35         stream_writer.write_record_batch(record_batch)
  36       ensure
  37         stream_writer.close
  38       end
  39     ensure
  40       output.close
  41     end
  42
  43     input = Arrow::MemoryMappedInputStream.new(tempfile.path)
  44     begin
  45       stream_reader = Arrow::RecordBatchStreamReader.new(input)
  46       assert_equal([field.name],
  47                    stream_reader.schema.fields.collect(&:name))
  48       assert_equal(Arrow::RecordBatch.new(schema,
  49                                           data.size,
  50                                           [build_boolean_array(data)]),
  51                    stream_reader.read_next)
  52       assert_nil(stream_reader.read_next)
  53     ensure
  54       input.close
  55     end
  56   end
  57 end