ruby/red-arrow/test/test-column.rb

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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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class ColumnTest < Test::Unit::TestCase
  def setup
    table = Arrow::Table.new("visible" => [true, nil, false])
    @column = table.visible
  end

  test("#to_arrow") do
    assert_equal(@column.data, @column.to_arrow)
  end

  test("#to_arrow_array") do
    assert_equal(@column.data.chunks[0], @column.to_arrow_chunked_array)
  end

  test("#to_arrow_chunked_array") do
    assert_equal(@column.data, @column.to_arrow_chunked_array)
  end

  test("#name") do
    assert_equal("visible", @column.name)
  end

  test("#data_type") do
    assert_equal(Arrow::BooleanDataType.new, @column.data_type)
  end

  test("#null?") do
    assert do
      @column.null?(1)
    end
  end

  test("#valid?") do
    assert do
      @column.valid?(0)
    end
  end

  test("#each") do
    assert_equal([true, nil, false], @column.each.to_a)
  end

  test("#reverse_each") do
    assert_equal([false, nil, true], @column.reverse_each.to_a)
  end

  test("#size") do
    assert_equal(3, @column.size)
  end

  test("#length") do
    assert_equal(3, @column.length)
  end

  test("#n_rows") do
    assert_equal(3, @column.n_rows)
  end

  test("#n_nulls") do
    assert_equal(1, @column.n_nulls)
  end

  sub_test_case("#==") do
    test("same value") do
      table1 = Arrow::Table.new("visible" => [true, false])
      table2 = Arrow::Table.new("visible" => [true, false])
      assert do
        table1.visible == table2.visible
      end
    end

    test("different name") do
      table1 = Arrow::Table.new("visible" => [true, false])
      table2 = Arrow::Table.new("invisible" => [true, false])
      assert do
        not table1.visible == table2.invisible
      end
    end

    test("different value") do
      table1 = Arrow::Table.new("visible" => [true, false])
      table2 = Arrow::Table.new("visible" => [true, true])
      assert do
        not table1.visible == table2.visible
      end
    end

    test("not Arrow::Column") do
      table = Arrow::Table.new("visible" => [true, false])
      assert do
        not table.visible == 29
      end
    end
  end

  test("#count") do
    table = Arrow::Table.new("revenue" => [1, nil, 3])
    assert_equal(2, table["revenue"].count)
  end

  test("#min") do
    table = Arrow::Table.new("revenue" => [1, 2, 3])
    assert_equal(1, table["revenue"].min)
  end

  test("#max") do
    table = Arrow::Table.new("revenue" => [1, 2, 3])
    assert_equal(3, table["revenue"].max)
  end

  test("#sum") do
    table = Arrow::Table.new("revenue" => [1, 2, 3])
    assert_equal(6, table["revenue"].sum)
  end

  test("#uniq") do
    table = Arrow::Table.new("revenue" => [1, 2, 2])
    assert_equal([1, 2], table["revenue"].uniq)
  end

  test("#cast") do
    table = Arrow::Table.new("revenue" => [1, nil, 3])
    assert_equal(Arrow::ChunkedArray.new([["1", nil, "3"]]),
                 table["revenue"].cast(:string))
  end
end